03.fm

Size: px
Start display at page:

Download "03.fm"

Transcription

1 29«6y ( ) w œwz 257 š³ š p e ³ w y Á Á½ y *Á **Á y w» w w e lg Effects of Si and Mo on the Temperature-Dependent Properties of High Si High Mo Ductile Cast Irons Kyeong-Hwan Choe, Sang-Mok Lee, Myung-Ho Kim*, Sang-Weon Yun**, and Kyong-Whoan Lee Korea Institute of Industrial Technology, Incheon, , Korea *Inha University, Incheon, , Korea **Castec Korea Co., Ltd, Busan, , Korea Abstract The effects of silicon and molybdenum on the temperature-dependent properties of high silicon and high molybdenum ductile cast iron were investigated. Microstructure was composed of ferrite, cell boundary complex carbide, carbide precipitated in the grain and graphite. The number and size of carbide decreased with the increase of silicon content and increased with the increase of molybdenum content, however, the size of cell boundary carbide increased above 0.81wt%Mo. The room temperature tensile strength increased with the increase of silicon and molybdenum contents. That did not increase with the latter with more than 0.8wt%. Meanwhile the high temperature tensile strength showed the similar trend to that of room temperature one, that of the specimen with 0.55wt%Mo was the highest. The A 1 transformation temperature increased with the silicon and molybdenum contents, and showed similar tendency with the variation of strength. It was discussed due to the solubility limit of Molybdenum in ferrite, of which value was assumed to be in the vicinity of 0.81wt%Mo. The weight after oxidation at 1,173K showed the result caused by the difference in solubility of molybdenum in the matrix. That and the thickness change after oxidation did not show any consistent trend with the silicon and molybdenum contents. Key words: Si-Mo ductile iron, Si and Mo addition, High temperature strength, Oxidation behavior, Thermal expansion. (Received November 10, 2009 ; Accepted December 1, 2009) 1. š³ š ³ w ƒƒ 4.0~6.0, š 0.4~2.0wt% r p ü w. œwz(society of Automotive Engineers) ³ w» ü ³ [1] Si w 4.0wt% ³ wš (Table 1 ). ü ƒ š lù p Ni w ƒ ƒ š š³ š ü w, w ü w w š. w ³ w 4.9wt% ¾ š, ü ù š ü y w j ù ù ƒw w š y [2-4]. š³ š w w ü j w e ³ w w w ƒ v w. ü ƒ e ³ w w ƒ [5-11], 1970 z z, 80 z l, 2000 CV w [12]ƒ. ü ü š w š p, ü y w e q p [13].» r p ü t š, w A 1 k w A 1 k e Áq w» ü k ƒ w w. w, t w q y ww v w. š³ š w ü ³ w w ƒƒ p w ƒ w w e ƒ w sƒw.

2 258 š³ š p e ³ w - y et al. Table 1. Chemical compositions of commercial heat resistant cast irons of SAE J2515[4]. Grade C (wt%) Si (wt%) Mo (wt%) Grade A 0.8~1.0 Grade B ~0.7 Grade C 0.4~ x 2.1 r x š š³ š ³ ³ (4.0~4.4wt%) š³ (4.7~ 4.9wt%) wš, w 0.6, 0.8, 1.0wt% y g ƒ x r w., r g, r ƒk 50 kg š q w, ww e k w Y w. 4%Ba-Fe-Si w y w. r yw Table 2 ùkü. r 1203K 3 w 873K¾ þwš w œþw w. w r x» w 2,000 ¾ w z 0.1 µm ù w v w 5% ù k 10 k w z Ÿwx (EPIPHOT 200, Nikon) w w. 2.2» sƒ» p sƒw» w 250 kn x» w x, š x» w v x w. ƒ r Y z l, KS B 0801 ³ 10y r ASTM A 327M-91 ³ w e r» ƒœw w. x KS B 0802 w j x 2 mm/min w. š extensometerƒ š x» (AUTOGRAPH AG-1, SHIMADZU, 250 kn) w 1,083K 15 w xr ³ w w z 0.5 mm j x w. 2.3 q p sƒ q p sƒ w r 6 mm, š ¼ 25 mm mx w š ASTM E831 ³ w dilatometer w xw. x w DIL 402PC (v NETZSCH) š N 2»» w 5K/ min 1,103K¾ j ƒ q d wš q š p w k d w. q p» š w» w ƒ r X- z e (XRD, D8-02/ BRUKER AXS GMBH) w X z ql š Cohen w» w. 2.4 š y p š yp sƒw» w r Y z ƒ, ƒ ƒƒ 10 mm (t 600 mm 2 ) j» w š t 2,000 ¾ w w. r wš 2L/min j 1,023 1,173K 50 w y d wš y w. 5 K/min w š 50 z þ k p sƒw. 3. š 3.1 Fig. 1 sƒ w ƒ r. š³ š r p» ky. ³ w r w. Fig. 2 ³ w ƒƒ wt% r k w z. k w µm j» ky r p w w (Fig. 2(a)), w y w (Fig. 2(b)). š z ky 1µm ü ky y. Fig. 3 e mw k y x y w a t ky, š b t ky. B. Black, w ky Fe, Mo Table 2. Chemical compositions of test specimens. Nominal group Low Si High Si Chemical compositions (wt%) Specimen C Si Mn Mo S P Fe Heat Heat Heat Heat bal. Heat Heat

3 Vol. 29, No. 6, 2009 Journal of the Korean FoundrymenÌs Society 259 Fig. 1. Representative annealed microstructures of nominal groups. Fig. 2. Comparison of as-cast and annealed microstructures in the case of 4.2wt% Si and 0.8wt%Mo: a) as-cast and b) annealed microstructure. Fig. 3. The morphologies of eutectic and precipitate carbide. Si w ky œ š x, ky œ k z x ky š šwš [14]. w ƒw œ ky j» ky ƒw, š³ ky j» ùkû. r p ü ³ w r p» y jš w yv x w š p w j.[15] Fig. 4 Thermo-Calc vp w ³ w Fe-C k œ y. ³ w ƒw, œ k d wš Si. w š ³ ƒ» k ww» [16] w w. œ š ƒwš œ j» w œ ky j» w., w ƒw, œ ƒw. œ š lù p / w š k. œ j w ù w. w ƒw œ š x ky j» ƒw. lù p» š þƒ lù p š ƒ w» š ƒ š k ww ky x w. Fig. 5 ³ w ƒƒ wt% Fe-Mo k. œ 2.0wt% š þƒ wì w 1,173K 1.0wt%, z ü w š

4 260 š³ š p e ³ w - y et al. Fig. 4. Variation of eutectic point in Fe-C phase diagram calculated by the Thermo-Calc software: (a) 4.2wt%Si & 0.55wt%Mo, (b) 4.8wt%Si & 0.55wt%Mo, (c) 4.2wt%Si & 1.05wt%Mo and (d) 4.8wt%Si & 1.05wt%Mo. Fig. 5. Fe-Mo phase diagram calculated by the Thermo-Calc software: (a) 3.0wt%C & 4.2wt%Si and (b) 3.0wt%C and 4.8wt%Si. Fig. 6. Various ambient temperature mechanical properties with the variation of Si and Mo contents; (a) tensile strength, (b) elongation, and (c) impact energy. 0.1wt%. þƒ ky k ƒ y» w» j»ƒ w. w, 1,203K w, w ky» š š w k y w w Fig. 2 ù kü. 3.2» Fig. 6» e ³ w w š. ³ w ƒw ƒwš w. w 0.55wt% ³ w ƒw w, j w. w 0.8wt%¾ w ƒw ƒ

5 29«6y ( ) w œwz 261 Fig. 7. Variation of high temperature tensile strength with Si and Mo contents at 1,083K. ƒw, w. w w ³ w w ùkû. w ƒw w, š³ w ƒ wì w w ³ 0.8wt%¾ j wš s j. ³ w š (1,083K) d Fig. 7. š³ ƒ 0.8wt%¾ ƒw, w, ³ w 0.55wt% ƒ š, w 0.8wt% 1.05wt% š³ û ùkü. ³ r p ü š y z g ƒ j [17]. Bjrkegren x mw ³ w ƒ [18]. r p» w š y z ƒ, 0.5wt% ƒ, ky x [19]. š³ š š y z ky w y z w w š q., y r, Fig. 8. Variation of onset temperature of A 1 transformation with Si and Mo contents. w û j ƒw ƒ 0.81wt% ƒs w. w ƒ ky ƒ j ky j» ƒ j» y z ƒ j w». š w e» p (y, k, d w ), x,,, j» [20]. š³ š» p r p» w ³ š w. A 1 k d 0.81wt% w ƒw w 0.81wt%¾» š ƒw w š y z ùkü, sy š y z» w š. š³ r š, 0.81wt% w w š yz w w ƒ, / ky w y z w ƒ š q. w, ³ r w ƒ û 0.55wt% ƒ ùkü. š w j» j» w r, j, j»ƒ Fig. 9. Variation of thermal expansion coefficient with Si and Mo contents for various temperature range; (a) 373~573K, (b) 573~773K, and (c) 773~973K.

6 262 š³ š p e ³ w - y et al. š ƒw. w 0.55wt% ³ r r w j»ƒ j r. š w ƒw ky j»ƒ ƒw. w w w š ƒ, ³ r š y w ¾ ƒ v w. 3.3 q p Fig. 8 ³ w A 1 k y š. A 1 k w ƒ BCC (r p) FCC ( lù p) ë w, ƒƒ k ƒ k w. ³ š³ w ƒw A 1 k ƒ w ƒ 0.8wt% w. w ³ w ƒw, A 1 k w. Fig. 9 ƒƒ r w q w. q w ƒw 0.8wt% ƒ, w, ³ ƒw š, š ³ w w. w w w ùkû. r, 373 ~ ~ , 573 ~ 773 Fig. 10. Variation of lattice parameter of ferrite matrix varying with Si and Mo contents ~ , š 773 ~ 973K 15.0 ~ ƒ w q ƒ ƒw ùkü. A 1 k q d w 0.81wt% š ƒ, w r p» w š w Fig. 11. Representative cross sections showing the oxidized layers after the high temperature oxidation test; (a) 1,023 and (b) 1,173K.

7 Vol. 29, No. 6, 2009 Journal of the Korean FoundrymenÌs Society 263 Fig. 12. Weight change of specimens after high temperature oxidation test; (a) 1,023 and (b) 1,173K. Fig. 13. Thickness change of specimens after high temperature oxidation test; (a) 1,023 and (b) 1,173K.., q 0.81wt% w w. 0.81wt% w w ƒ wì ky j» ƒ w. š³ š r p, Fe- Si-Mo wky w w. ky q (Mo 2 C α = ( )) r p. w q ƒ ƒw q wš, q ƒ j»ƒ ƒw q ƒw. w w XRD l r p» w ùkù (Fig. 10). 3.4 š y p Fig. 8 1,023 1,173K» 50 w z r w. r 2 yd x, w y d t, wù t üd x. 1,023 1,173K yd s ƒw š, 1023K yd ƒ ùkû. SEM-EDX w yd Fe Si s w, t yd Fe ƒ ùkùš, üd yd Si ƒ w ùkù. Fig ƒƒ y x z y Ì y ³ w w ùkü. y w y (š³ K) w w š, w ƒw wš 0.85wt% ƒ. Ì y ³ w w w.» š w 0.81wt% Fig. 9 y w y d y w. 1,173K y w 0.81wt% yƒ, y» w w y x» w»» ƒ ƒ». 4. š³ š e ³ w w w. 1) š³ š r p, w ky, ü ky. 2) ³ w ƒw ky j» wš w ƒw ƒw, 0.81wt% w ky j»ƒ ƒw. 3) ³ w w

8 264 š³ š p e ³ w - y et al. ƒw ƒw, 0.81wt% w ƒw. š š³ w w, ³ 0.55wt% w ƒ ùkü. 4) A 1 k w ³ w w ƒw w, 0.81wt% w s w. 5) 1,173K y» š» w ùkü. 1,023K y Ì y ³ w w w. š x [1] "High temperature materials for exhaust manifold", SAE Standard J 2515, SAE (1999). [3] H. Tsuda, N. Suzuki, S. Ishuzuka and T. Kurikuma: J. JFS, "Effect of Molybdenum and Vanadium on properties at elevated temperature of high silicon spheroidal graphite cast iron", 76(10) (2004) [4] N. Suzuki, S. Ishizuka, Z. Z. Zhang and N. Akita: J. JSAE, "Development of Vanadium-added heat resistant cast iron for exhaust manifold", 28 (2003) [5] H. I. Park and H. Y. Jeong: J. Kor. Foundrymen's Soc., "High temperature properties of vanadium and molybdenum added high silicon ductile iron", 27(5) (2007) [6] D. L. Sponseller, W. G. Scholz and D. F. Rundle: AFS Trans., "Development of Low-Alloy Ductile Irons for Service at F", 76 (1968) [7] J. Y. Kim and H. Y. Ra: J. Kor. Foundrymen's Soc., "The Effects of Si and Mo on the Structures and Mechanical Properties in High Si Spheroidal Graphite Cast Iron", 10(3) (1990) [8] H. J. Bang: J. Kor. Foundrymen's Soc., "Ductile Cast Irons for Elevated Temperature Service", 12(2) (1992) [9] S. W. Kim, K. D. Woo, S. W. Han, J. K. Kim and D. Y. Kim: J. Kor. Foundrymen's Soc., "The study on high Si and Mo DCI with high temperature oxidation resistance property", 18(2) (1998) [10] S. W. Kim, K. D. Woo, S. W. Han and J. K. Kim: Proc. of KSAE, "A development of high Si DCI with heat resistance and high temperature oxidation resistance properties for automobile parts", (1996) [11] S. H. Park, J. M. Kim, H. J. Kim, S. J. Ko, H. S. Park and J. D. Lim: "Development of a heat resistant cast iron alloy for engine exhaust manifolds", SAE (2005). [12] D. Li and R. Logan: "High Silicon Cast Iron with Mixed Graphite (MG) Shape for Elevated Temperature Applications", SAE (2007). [13] D. Li, R. Perrin, G. Burger, D. McFarlan, B. Black, R. Logan and R. Williams: "Solidification Behavior, Microstructure, Mechanical Properties, Hot Oxidation and Thermal Fatigue Resistance of High Silicon SiMo Nodular Cast Irons", SAE (2004). [14] B. Black, G. Burger, R. Logan, R. Perrin and R. Gundlach: "Microstructure and dimensional stability in Si-Mo ductile irons for elevated temperature applications", SAE (2002). [15] J. D. Mullins: "Ductile Iron Data for Design Engineers", Rio Tinto Iron & Titanium Inc., (1990) [16] K. Ogi, A. Sawamoto and J. Hiwatashi: "Transformation Process and Behavior of Carbon in Austempering Heat Treatment of Spheroidal Graphite Cast Iron", 60(4), (1988) [17] F. B. Pickering and T. Gladmann: ISI Special Report No. 81, (1963), 10. [18] L. -E. Björkegren, H. Hamberg and B. Johannesson: AFS Trans. "Mechanical Properties and Machinability of Si- Solution-Hardened Ferritic Ductile Iron", 104 (1997) [19] American Foundrymen's Society: "Ductile Iron Handbook" (1993), 88. [20] K. Maruyama and H. Nakashima: "Materials Science of High Temperature Strength" (1997), 189.

untitled

untitled [ ] œwz, 21«6y(2008) J. of the Korean Society for Heat Treatment, Vol. 21, No. 6, (2008) pp. 300~306 š y w p x*, **Á **Áy y* * ** w œ w œw, w» gœ Solid State Diffusion Brazing of the Aluminum Alloy Castings

More information

fm

fm [ ] w wz DOI: 10.3740/MRSK.2009.19.12.692 Kor. J. Mater. Res. Vol. 19, No. 12 (2009) y INCONEL 718w Gas Tungsten Arc Welding» p sƒ ½»y Á *Á *Á y** ( ) d lj p wœq, *w wœ» q **( ) d lj p t Mechanical Properties

More information

14.531~539(08-037).fm

14.531~539(08-037).fm G Journal of the Korea Concrete Institute Vol. 20, No. 4, pp. 531~539, August, 2008 š x y w m š gj p { sƒ z 1) * 1) w w Evaluation of Flexural Strength for Normal and High Strength Concrete with Hooked

More information

10.063~070(B04_윤성식).fm

10.063~070(B04_윤성식).fm J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 63-70 Mg-3%Al-1%Zn w ƒœ» y Á x*á **Á Á w œw *w s l I ûer ** t Effect of Thermomechanical Treatment on Microstructure and Mechanical Properties

More information

12.077~081(A12_이종국).fm

12.077~081(A12_이종국).fm J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 77-81 y w» e wx Á w œw Fabrication of Ceramic Batch Composition for Porcelain by Using Recycled Waste Ceramic Powder Hyun Guen Han, and

More information

14.fm

14.fm Journal of the Korean Ceramic Society Vol. 44, No. 2, pp. 93~97, 2007. Preparation of High Purity Si Powder by SHS Chang Yun Shin, Hyun Hong Min, Ki Seok Yun, and Chang Whan Won Engineering Research Center

More information

304.fm

304.fm Journal of the Korean Housing Association Vol. 20, No. 3, 2009 yw s w - û - A Study on the Planning of Improved-Hanok - Focused on Jeon-Nam Province - y* ** z*** **** Kang, Man-Ho Lee, Woo-Won Jeong, Hun

More information

(163번 이희수).fm

(163번 이희수).fm Journal of the Korean Ceramic Society Vol. 48, No. 4, pp. 323~327, 2011. DOI:10.4191/KCERS.2011.48.4.323 Electrical Properties and Temperature Stability of Dysprosium and Erbium Co-doped Barium Titanate

More information

< DC1A4C3A5B5BFC7E22E666D>

< DC1A4C3A5B5BFC7E22E666D> ¼ (Jeong, Jung Chae)*, ý (Kim, Yoon Soo), (Shin, Woo Young), Þ Ñ (Park, Jong Man) ò ý ƒ Ð (Korea Evaluation Institute of Industrial Technology) (Shin, Jae-Heyg) Š æ (Ministry of Knowledge Economy) 1. :

More information

12(4) 10.fm

12(4) 10.fm KIGAS Vol. 12, No. 4, December, 2008 (Journal of the Korean Institute of Gas) l x CNG» v m s w ½ Á y w» œw (2008 9 30, 2008 12 10, 2008 12 10 k) Numerical Analysis for Temperature Distribution and Thermal

More information

64.fm

64.fm Journal of the Korean Ceramic Society Vol. 44, No. 7, pp. 375~380, 2007. Tribological Properties of Carbon Layers Produced by High Temperature Chlorination in Comparison with DLC Coating Hyun-Ju Choi,

More information

10(3)-09.fm

10(3)-09.fm w y wz 10«3y 253~258 (2010.12.) Journal of Korean Society of Urban Environment ³ w Á» Á Á y w y œw (2010 11 22, 2010 12 9 k) Study on Determine of Detention Pond in Small Developed Area In-Soo Chang ½

More information

16(5)-04(61).fm

16(5)-04(61).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.326 ƒ w Fe œ w Cu wy SPS (II) II. w SPS p ½ *Á½ Á½{ a Á½ š b w œw, a w» gœ, b y œ Production of Fe Amorphous Powders by Gas-Atomization

More information

16(5)-03(56).fm

16(5)-03(56).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.316 ƒ w Fe œ w Cu wy SPS (I) I. ƒ wy y Á xá½ Á½ *Á½{ a w œw, a w» gœ Production of Fe Amorphous Powders by Gas-atomization Process

More information

10(3)-10.fm

10(3)-10.fm w y wz 10«3y 259~264 (2010.12.) Journal of Korean Society of Urban Environment w gj p p y Á Á½k * w m œw Á* w y œw (2010 9 28, 2010 10 12 k) Characteristics of Antiwashout Underwater Concrete for Reduction

More information

605.fm

605.fm Journal of the Korean Housing Association Vol. 19, No. 6, 2008 y k y p w sƒ Care-giver s Needs and Evaluation on the Actual Condition of the Playgrounds in Child Care Facilities y* Choi, Mock-Wha x **

More information

82-01.fm

82-01.fm w y wz 8«( 2y) 57~61, 2005 J. of the Korean Society for Environmental Analysis p w w Á Á w w» y l Analysis of Influence Factors and Corrosion Characteristics of Water-pipe in Potable Water System Jae Seong

More information

19(1) 02.fm

19(1) 02.fm Korean J. Crystallography Vol. 19, No. 1, pp.7~13, 2008 Ÿ (ICISS) w š t w (2): t w y w œw Surface Structure Analysis of Solids by Impact Collision Ion Scattering Spectroscopy (2): Atomic Structure of Semiconductor

More information

16(5)-06(58).fm

16(5)-06(58).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.336 y-y w Sm-Fe w ƒ w zá *Á w»» The Effect of Excess Samarium Oxide on the PreparationG of Sm-Fe Alloy Powder by Reduction-diffusion

More information

10(3)-02.fm

10(3)-02.fm w y wz 10«3y 203~211 (2010.12.) Journal of Korean Society of Urban Environment w ù p yá k«áyw *Á xá½k w y œw Á* y w (2010 9 15, 2010 12 2 k) Characterization of Nonpoint Source Pollutant Loads from the

More information

16(1)-3(국문)(p.40-45).fm

16(1)-3(국문)(p.40-45).fm w wz 16«1y Kor. J. Clin. Pharm., Vol. 16, No. 1. 2006 x w$btf3fqpsu'psn û w m w Department of Statistics, Chonnam National University Eunsik Park College of Natural Sciences, Chonnam National University

More information

10(3)-12.fm

10(3)-12.fm w y wz 10«3y 273~280 (2010.12.) Journal of Korean Society of Urban Environment p yá xá½k w y œw (2010 9 15, 2010 12 2 k) Analysis of Characteristics of Delivered Nonpoint Source Pollution at Forested Watershed

More information

82.fm

82.fm Journal of the Korean Ceramic Society Vol. 44, No. 9, pp. 524~528, 2007. Determination of Critical Chloride Content of Ordinary Portland Cement Concrete by Linear Polarization Technique Hong-Sam Kim, Hai-Moon

More information

9(3)-4(p ).fm

9(3)-4(p ).fm w wz J. Kor. Soc. Cloth. Ind. 9«3y, 2007 Vol. 9, No. 3, pp.319-326(2007) w xk x p w q w Analysis of Foot Characteristics According to the Classification of Foot Types of Junior High School Girls Ji-Young

More information

416.fm

416.fm Journal of the Korean Housing Association Vol. 20, No. 4, 2009 œ qp œ y An Analysis of Change on the Apartment Unit Plans and the Interior Spaces Related to Women * Choi, ByungSook ** Park, JungA "CTUSBDU

More information

11(5)-12(09-10)p fm

11(5)-12(09-10)p fm w wz J. Kor. Soc. Cloth. Ind. 11«5y, 2009 Vol. 11, No. 5, pp.799-807(2009) w w * k ƒm w pg p w, ƒm w q w A Qualitative Research on Pursuing Image and Appearance Management Behavior of Brides Eun-Joo Bae

More information

17.393~400(11-033).fm

17.393~400(11-033).fm Journal of the Korea Concrete Institute Vol. 23, No. 3, pp. 393~400, June, 2011 GGGGG DOI 10.4334/JKCI.2011.23.3.393 x RC { sƒ y y 1) *Á½ 1) Á 2) 1) y w œw 2) w œw Bond Strength Evaluation of RC Beams

More information

07.051~058(345).fm

07.051~058(345).fm w wz 8«3y 2008 6 pp. 51 ~ 58 m qp yp š w k sƒ Evaluation of Dynamic Modulus based on Aged Asphalt Binder y*á **Á***Á**** Lee, Kwan-HoÁCho, Kyung-RaeÁLee, Byung-SikÁSong, Yong-Seon Abstract Development

More information

8(3)-15(p ).fm

8(3)-15(p ).fm w wz J. Kor. Soc. Cloth. Ind. 8«3y, 2006 Vol. 8, No. 3, pp.357-362(2006) w p k sƒ ½ Á Á w w w A Study on the Mechanical and Hand Properties of the Lining Fabrics Myung-Ok Kim, Mi-Kyung Uh and Myung-Ja

More information

page 1end

page 1end C 0.0.2 ma Cr 14.5~16.5 Co 2.5 max Iron 4~7 Mn 1 max Mo 15 ~ 17 Ni Balance P 0.03 max Si 0.08 max S 0.03 max W 3 ~ 4.5 V 0.35 max 8.89g/cm 3 Multipurpose corrosion resistance of NickelMolybdenumChrome.

More information

69-1(p.1-27).fm

69-1(p.1-27).fm 99 A 380 B 787 : wœ z w * w w wœ» A380 B787 wœ» w. wœ» ww r. w wœ» p j y w r» w. I. II. z III. A380 B787 IV. A380 V. wœ» : x VI. z VII. I. A380 B787»ƒ z wœ w, w w p j w w ƒ r. t wœ w ƒ w w wœ» š œm wš,

More information

50(5)-07.fm

50(5)-07.fm Printed in the Republic of Korea w 3w yû x w w w Á x* w w w yw (2006. 3. 14 ) A research of the Difference in Teaching Styles and Understanding of 9 th Grade Students About Lead-iodide Precipitation Reaction

More information

4.fm

4.fm Journal of the Korean Ceramic Society Vol. 46, No. 1, pp. 30~34, 2009. Optimization of Glass Wafer Dicing Process using Sand Blast Won Seo, Young-mo Koo*, Jae-Woong Ko**, and Gusung Kim Department of Electronic

More information

fm

fm Journal of the Korea Concrete Institute Vol. 24, No. 1, pp. 079~086, February, 2012 GGGGG http://dx.doi.org/10.4334/jkci.2012.24.1.079 섬유보강콘크리트에묻힌 GFRP 보강근의부착거동에대한섬유영향평가 1) Á½ 1) Á 2) Á 1) * 1) ³ w y lœw

More information

본문.PDF

본문.PDF ' Zr-Nb-Sn-Fe-X Evaluation of Corrosion and Mechanical Properties of Zr-Nb-Sn-Fe-X Alloys for Fuel Claddings,,, 15 36 LiOH 4 Zr-Nb-Sn-Fe-X. LiOH Zr-Nb-Sn-Fe-X, LiOH Zircaloy-4.. 47 52. Abstract The corrosion

More information

untitled

untitled ª Œª Œ 27ƒ 2B Á 2007 3œ pp. 193 ~ 199 ª ƒ w d w ƒ sƒ Methodology of Drought Assessment Using National Groundwater Monitoring Network Data «x Á½ Kwon, Hyung JoongÁKim, Seong Joon Abstract The objective

More information

<312D303128C1B6BAB4BFC1292E666D>

<312D303128C1B6BAB4BFC1292E666D> k Ÿy y y + ûz m Ì ˆw k Ÿ ø ky w y y» wk Ÿ v w k w w ƒ Ÿ ew k Ÿy yø k Ÿ ý k z» w ƒ w Ÿ y k y w x mw w w ³Ÿ wšy v mw y w r œw yÿ ý w z»ÿ Ÿ»» Ÿ ¾ Ÿ 6TCXGN 9GGMN[ ýw k Ÿ Ÿ ƒ š wš y w k Ÿ ƒ m ³ w w y y y 'EQVQWTKUO

More information

50(1)-09.fm

50(1)-09.fm 2006, Vol. 50, No. 1 Printed in the Republic of Korea 언빨래가마르는현상에대한중등학교화학전공교사들의인식조사 ½x Á» Á½ # Á x* w w yw y š w w # w w (2005. 5. 11 ) A Research of Secondary School Chemistry Major Teachers Perceptions

More information

10(1)-08.fm

10(1)-08.fm w y wz 10«( 1y) 47~52, 2007 J. of the Korean Society for Environmental Analysis œ w t y ½ xá Á x Á½ Á x* Ÿ œ, * w œw Optimization of Coagulation In The Conventional Water Treatment Plant Jun-Hyun Kim,

More information

27(5A)-07(5806).fm

27(5A)-07(5806).fm ª Œª Œ 27ƒ 5A Á 2007 9œ pp. 753 ~ 758 gj pœw gj p { x A New Test Method for Pure Isotropic Flexural Tensile Strength of Concretes Ÿ Á y Á x Zi, GoangseupÁOh, HongseobÁChoi, Jinhyek Abstract Proposed is

More information

16(2)-7(p ).fm

16(2)-7(p ).fm w wz 16«2y Kor. J. Clin. Pharm., Vol. 16, No. 2. 2006 ü t xy y w tœ ½ BÁ x BC B y w w w C y w w w Current Status and Expectations of Orphan Drugs in Korea -In point of supplying medicines for the rare

More information

23(2) 71.fm

23(2) 71.fm J. of Korean Institute of Fire Sci. & Eng. [ ] Vol. 23, No. 2, 2009 w w w w w w Stud on the Fire Behaviour of Composite Beam with Loading and Unloading ½ *Á û**á½ ***Á½ Sung-Bae Kim* Chang-Nam Lee** Woo-Chul

More information

3.fm

3.fm Journal of the Korean Ceramic Society Vol. 44, No. 1, pp. 12~17, 2007. A Study on the Preparation of Bone Ash and Celadon Bone Body Using Pig Bone Jae-Jin Jeong, Sang-Hee Lee, Yong-Seok Lee,* and Byung-Ha

More information

( )-36.fm

( )-36.fm Journal of the Korean Ceramic Society Vol. 47, No. 3, pp. 232~236, 2010. DOI:10.4191/KCERS.2010.47.3.232 Development of the Abrasives for Water-jet by Using an Air Bubbling SedimentationG Rate Control

More information

Alloy Group Material Al 1000,,, Cu Mg 2000 ( 2219 ) Rivet, Mn 3000 Al,,, Si 4000 Mg 5000 Mg Si 6000, Zn 7000, Mg Table 2 Al (%

Alloy Group Material Al 1000,,, Cu Mg 2000 ( 2219 ) Rivet, Mn 3000 Al,,, Si 4000 Mg 5000 Mg Si 6000, Zn 7000, Mg Table 2 Al (% http://wwwtechnonetcokr (Aluminum & Aluminum BasedAlloy) : LG 1 Aluminum Table 1, 2 1000 7000 4 Al 990% Al 1XXX AlCu 2XXX AlMn 3XXX AlSi 4XXX AlMg 5XXX AlMgSi 6XXX AlZn(Mg, Cu) 7XXX 8XXX ( ) 9XXX Fig 1

More information

26(2)-04(손정국).fm

26(2)-04(손정국).fm Ñ s k w 1Á y 2 Á û 1 Á½ z 1 Á½ 1* 1 ³ w yw, 2 w» (*E-mail: jimankim@skku.edu) 1. m ƒ w»» w 4»» y š. w 4»» l, l, l w» w» k. w»» { ƒ j. x š x w ƒwš k (Direct Methanol Fuel Cell: DMFC)[1]ƒ wù ƒ w š. DMFC

More information

w w l v e p ƒ ü x mw sƒw. ü w v e p p ƒ w ƒ w š (½kz, 2005; ½xy, 2007). ù w l w gv ¾ y w ww.» w v e p p ƒ(½kz, 2008a; ½kz, 2008b) gv w x w x, w mw gv

w w l v e p ƒ ü x mw sƒw. ü w v e p p ƒ w ƒ w š (½kz, 2005; ½xy, 2007). ù w l w gv ¾ y w ww.» w v e p p ƒ(½kz, 2008a; ½kz, 2008b) gv w x w x, w mw gv ª Œª Œ 30ƒ 5A Á 2010 9œ pp. 475 ~ 484 gj p ª v e p p PSC ƒ gv : II. x w Precast Concrete Copings for Precast Segmental PSC Bridge Columns : II. Experiments and Analyses ½kzÁ½ Á zá x Kim, Tae-HoonÁKim,

More information

( )45.fm

( )45.fm Journal of the Korean Ceramic Society Vol. 46, No. 3, pp. 295~300, 2009. DOI:10.4191/KCERS.2009.46.3.295 Analysis of Oxide Coatings Formed on Al1050 Alloy by Plasma Electrolytic Oxidation Bae-Yeon Kim,

More information

93.fm

93.fm Journal of the Korean Ceramic Society Vol. 45, No. 10, pp. 625~630, 2008. Effect of Storage Conditions on the Setting Properties of Brushite Bone Cement Containing Granular β-tricalcium Phosphate Sun-Ae

More information

012임수진

012임수진 Received : 2012. 11. 27 Reviewed : 2012. 12. 10 Accepted : 2012. 12. 12 A Clinical Study on Effect of Electro-acupuncture Treatment for Low Back Pain and Radicular Pain in Patients Diagnosed with Lumbar

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA Printed in the Republic of Korea "/"-:5*$"- 4$*&/$& 5&$)/0-0(: Vol. 18, No. 5, 436-443, 2005,1"$ w Q) t p z Á 1w w œw 2 w œ yw Effects of surface properties and solution ph on the pollutants removal of

More information

85.fm

85.fm Jurnal f the Krean Ceramic Sciety Vl. 44, N. 9, pp. 502~509, 2007. Examinatin n Applicatin f High-Perfrmance Cncrete using Fine Fly Ash as Replacement Material f Silica Fume Bum-Sik Lee, Sang-Kyu Kim,

More information

12(2)-04.fm

12(2)-04.fm J. Korean. Soc. Living. Environ. Sys. Vol. 12, No. 2, pp 106~111(2005) w y y w z œ k üœ» p ½ Á Á Á ³ Á Á½Ÿ w w w, *g», ** w w Effects of Strategies to Improve Indoor Air Quality at Pre-occupancy Stage

More information

87.fm

87.fm Journal of the Korean Ceramic Society Vol. 44, No. 9, pp. 489~495, 2007. Physical Properties of Ultrafine Ash Blended Cement Dong-Woo Yoo, Seung-Ho Byun, and Jong-Taek Song Department of New Materials

More information

( )-83.fm

( )-83.fm Journal of the Korean Ceramic Society Vol. 8, No. 1, pp. 0~5, 011. DOI:10.191/KCERS.011.8.1.00 Solidification of Heavy Metal Ions Using Magnesia-phosphate Cement HunG Choi, Hyun Ju Kang, Myung Shin Song,

More information

18(3)-10(33).fm

18(3)-10(33).fm Journal of Korean Powder Metallurgy Institute Vol 18 No 3 011 DOI: 10150/KPMI01118383 e x 5Mg(OH) MgSO 3H O x w MgO NH OH w a báv y aá½xk aá½ aá½ cá½ bá½ a * aw» l bš w œw ck Effect of MgO and NH OH on

More information

27(5A)-13(5735).fm

27(5A)-13(5735).fm 27ƒ 5A Á 2007 9œ pp. 735 ~ 743 gj p ª w š p w { ³ p Flexural Behavior and Cracking Characteristics of High Performance Fiber Reinforced Cementitious Composites according to Fine Aggregate Contents *Á ³x**

More information

144.fm

144.fm Journal of the Korean Ceramic Society Vol. 43, No. 12, pp. 865~871, 2006. Evaluation of Characteristics of Simulated Radioactive Vitrified Form Using Cooling Methods Kang-Taek Lee, Kyu-Ho Lee, Duk-Ki Yoon,

More information

한 fm

한 fm Journal of the Korean Magnetics Society, Volume 19, Number 6, December 2009 DOI: 10.4283/JKMS.2009.19.6.203 BaTi 0.5 Co 0.5 Fe 11 O 19 Mx r p Ka- q p ½ Á½ w, œw, w», 12, 361-763 (2009 8 4, 2009 9 10, 2009

More information

fm

fm [ ] w wz Kor. J. Mater. Res. Vol. 17, No. 3 (2007) Sn-3.0 Ag-0.5 Cu/OSP 무연솔더접합계면의접합강도변화에따른전자부품열충격싸이클최적화 y Á½{ *Á Á½Ÿ * t sƒ l *w wœ w wœ œw Thermal Shock Cycles Optimization of Sn-3.0 Ag-0.5 Cu/OSP Solder

More information

83.fm

83.fm Journal of the Korean Ceramic Society Vol. 44, No. 9, pp. 483~488, 2007. The Influence of on the Clinker Mineral Composition and Cement Quality Tae-Hyoung Eom, Won-Seok Kim, Chang-Bum Kim, Byeong-Yong

More information

04-46(1)-06(조현태).fm

04-46(1)-06(조현태).fm w œwz, 46«1y 2009 Textile Science and Engineering Vol. 46, No. 1, 2009 ù 2'6 wx xk Á «w œ w» Áq œw k 1PG $CVJ1PG 5VGR &[GKPI H 0[NP2'6 5RNKV 6[RG /KETHKDGT *[GP 6CG %J CPF%JWN-YP2CTM &GRCTVOGPV H 1TICPKE

More information

43(5)-1.fm

43(5)-1.fm w œwz, 43«5y 2006 Textile Science and Engineering Vol. 43, No. 5, 2006 용융블렌드를이용한 PLA/PEG 블록공중합체의제조 Á w œw k Preparation of PLA/PEG Block Copolymer via Melt Blend %JGQN 5QQ ;QQP CPF &QPI 5WP,K 8q g yq r

More information

12(3) 10.fm

12(3) 10.fm KIGAS Vol. 12, No. 3, September, 2008 (Journal of the Korean Institute of Gas) ü LP ƒ š Database w š Á Á½z w ywœw (2008 6 10, 2008 8 12 (1 ), 2008 9 5 (2 ), 2008 9 5 k) Constructing a Database Structure

More information

17(3)-00(282).fm

17(3)-00(282).fm w ywz 17«3y(2012)/ 1 PPS l yw p le * Á * Áh s * Áfld ** Comparison of Nano-particle Emission Characteristics in CI Engine with Various Biodiesel Blending Rates by using PPS System J. W. Kwon, M. S. Kim,

More information

06.177~184(10-079).fm

06.177~184(10-079).fm Journal of the Korea Concrete Institute Vol. 23, No. 2, pp. 177~184, April, 2011 GGGGG DOI 10.4334/JKCI.2011.23.2.177 x w w MRS w p s y 1) Á z 2) Á x 3) * 1) wû w œw 2) w œw 3) w Nonlinear Analysis for

More information

82-02.fm

82-02.fm w y wz 8«( 2y) 00~00, 2005 J. of the Korean Society for Environmental Analysis Calix[6]arene w k š w *Á x Á Á«ƒm w yw, *w w yw Cesium Ion Selective Solid Contact Electrodes Based on Calix[6]arene Won-sik

More information

( )-113.fm

( )-113.fm Journal of the Korean Ceramic Society Vol. 46, No. 6, pp. 657~661, 009. DOI:10.4191/KCERS.009.46.6.657 Rheological Properties of Cement Pastes Blended Finex-Slag Powder Keun Jae Lee, Seung Ho Byun, and

More information

38(6)-01.fm

38(6)-01.fm y, 38«, 6y, 699-705, 2005 Econ. Environ. Geol., 38(6), 699-705, 2005 t sÿ y xk 1 Á s 2Á z 1 Á½ 1 Á e 3 1 w y w,» w, 2w y w, 3š w y w Chemical Speciation of Heavy Metals in Geologic Environments on the

More information

14(4) 09.fm

14(4) 09.fm J. Korean. Soc. Living. Environ. Sys. Vol. 14, No. 4, pp 343~350(2007) w y y w z 14 «4 y 2007 yw» l s p»xá ³ *w w w œw, **w w w The Property of Pressure Distribution of Hybrid Underfloor Air Distribution

More information

16(5)-02(57).fm

16(5)-02(57).fm Jurnal f Krean Pwder Metallurg Institute Vl. 16, N. 5, 2009 DI: 10.4150/KPMI.2009.16.5.310 /ekœ w TiC/C w w ¼ *Áw a w œ w œw, a Snthesis f TiC/C Cmpsite Pwder b the Carbthermal Reductin Prcess Gil-Geun

More information

( )-101.fm

( )-101.fm Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 503~508, 2010. DOI:10.4191/KCERS.2010.47.6.503 The High Density Sintering of Green-emitting -SiAlON:Eu Ceramic Plate Phosphor Young-Jo Park, Sung-Hoon

More information

( )-42.fm

( )-42.fm Journal of the Korean Ceramic Society Vol. 47, No. 3, pp. 256~261, 2010. DOI:10.4191/KCERS.2010.47.3.256 Effect of Al Alloy Composition on Physical and Crystallographical Properties of Plasma Electrolytic

More information

15.101~109(174-하천방재).fm

15.101~109(174-하천방재).fm w wz 8«4y 2008 8 pp. 101 ~ 109 w» m -,, - A Study on Warnning Criteria Investigation of Automated Rainfall Warning System -Focused on Realationship of Water Level, Discharge and Precipitation - Á Á Á Ahn,

More information

16(6)-06(08(77)).fm

16(6)-06(08(77)).fm Journal of Korean Powder Metallurgy Institute DOI: 104150/KPMI2009166416 š / g e w p» p a,b Á y b Áy x a, * a KAIST œw, b ( )» Interfacial Characteristics and Mechanical Properties of HPHT Sintered Diamond/SiC

More information

17(1)-08(06).fm

17(1)-08(06).fm Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2010.17.1.052 š p x œ w Al jy p sƒ xá a Á Á½x * swœ w œw, a x HYSCO» Microstructure and Mechanical Behavior of Ultrafine Grained Bulk Al

More information

41(6)-09(김창일).fm

41(6)-09(김창일).fm 269 Ar v Na 0.5 K 0.5 NbO 3 t ½ t,, ½ w,, ½ w»œw Surface Reaction of Na 0.5 K 0.5 NbO 3 Thin Films in Inductively Coupled Ar Plasma w t œwz J. Kor. Inst. Surf. Eng. Vol. 41, No. 6, 2008. < > Dong-Pyo Kim,

More information

Microsoft Word - KSR2012A038.doc

Microsoft Word - KSR2012A038.doc YWXY º º t rzyywxyhwz_ º zƒ A Study on the Relation of Railroad System and Energy Saving ö ä ø ã ä ãã In Moon, Han-Min Lee *, Jong-Eun Ha * * Abstract Now the world, such as the impact of fossil energy

More information

( )-103.fm

( )-103.fm Jurnal f the Krean Ceramic Sciety Vl. 46, N. 6, pp. 643~647, 2009. DOI:10.4191/KCERS.2009.46.6.643 Densificatin Behavir f C/C Cmpsite Derived frm Cal Tar Pitch with Small Amunt f Idine Additin Kwang Yun

More information

<30332DB9E8B0E6BCAE2E666D>

<30332DB9E8B0E6BCAE2E666D> kœw» y w k p y w k» z wš ye z w mdkqvqrg üœ» y» Ÿ w kœwgeqgpikpggtkpiy glj GEQVGEJPQNQI[ œw w k w yz š y j œ w m w y ˆ mw y» kœ w k û ³ y ƒ ƒ» ƒ w œw w w y ƒƒ» k z w» %NGCP 9CVGT #EV wšw y ù» œ w w w t

More information

15.fm

15.fm Journal of the Korean Ceramic Society Vol. 44, No. 2, pp. 98~102, 2007. Effect of Recycling Time on Stability of Colloidal Silica Slurry and Removal Rate in Silicon Wafer Polishing Eun-Suck Choi and So-Ik

More information

?

? Annual Report National Museum of Modern and Contemporary Art, Korea CONTENTS Annual Report National Museum of Modern and Contemporary Art, Korea Annual Report National Museum of Modern and Contemporary

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA Printed in the Republic of Korea "/"-:5*$"- 4$*&/$& 5&$)/0-0(: Vol. 18, No. 5, 425-430, 2005» 677*4 Ÿ w sƒ ½»x Á Á½ k w y w, w y œw Some considerations for the analytical approaches to measure atmospheric

More information

26(3D)-17.fm

26(3D)-17.fm 26ƒ 3D Á 2006 5œ pp. ~ ª y w qp yw k d Predictive Equation of Dynamic Modulus for Hot Mix Asphalt with Granite Aggregates yá½x Á Lee, Kwan-HoÁKim, Hyun-OÁJang, Min-Seok Abstract The presented work provided

More information

8(2)-4(p ).fm

8(2)-4(p ).fm w wz J. Kor. Soc. Cloth. Ind. 8«2y, 2006 Vol. 8, No. 2, pp.177-182(2006) x w e w 1) Á Ÿ 1) Á»û 2) 1) ƒm w q w 2) w w w The Effect of Media on Taking Plastic Surgery Chong-Hee Yun 1), Su-Kwang Sung 1) and

More information

<30312DC0CCC7E2B9FC2E666D>

<30312DC0CCC7E2B9FC2E666D> 균류의다양성과역할 이향범 û w œw 머리말 k w š ³ q š yw < Ð >» w ww k w w v š q w Á Á w tyw š 2QKPVKPI CPF *[FG ú ƒ x %QPXGPVKQP QP $KQNQIKECN &KXGTUKV[ %$&» w w ««wš y w» š x ƒ w œ ƒ» ƒ œsw w ³ wš ù š y š ƒ t š ƒ wš»ƒ

More information

50(4)-10.fm

50(4)-10.fm 2006, Vol. 50, No. 4 Printed in the Republic of Korea 칼코겐이도핑된망간산화물의저온합성연구 k Á z Á, *Áy, * y w ù w yw x ù l w» ww (2006. 7. 13 ) Chimie Douce Synthesis of Chalcogen-Doped Manganese Oxides Seung Tae Lim,GDae

More information

DOOSAN HEAVY INDUSTRIES & CONSTRUCTION TOOL STEEL FOR DIE CASTING & HOT STAMPING The ever-faster pace of change necessitates products of ever-higher p

DOOSAN HEAVY INDUSTRIES & CONSTRUCTION TOOL STEEL FOR DIE CASTING & HOT STAMPING The ever-faster pace of change necessitates products of ever-higher p Doosan Heavy Industries & Construction TOOL STEEL FOR DIE CASTING & HOT STAMPING DOOSAN HEAVY INDUSTRIES & CONSTRUCTION TOOL STEEL FOR DIE CASTING & HOT STAMPING The ever-faster pace of change necessitates

More information

Microsoft Word - KSR2013A320

Microsoft Word - KSR2013A320 k ƒ! YWXZ º º t rzyywxzhzyw k ep k Dynamic Behavior of Bridge considering Various Light Weight Rail Vehicles Õ äø ÐãäÕò ãã Sang-Su Kim, Yong-ul Park *, Man-Cheol Kim ** Abstract The purpose of this paper

More information

( )-94.fm

( )-94.fm Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 566~571, 2010. DOI:10.4191/KCERS.2010.47.6.566 Effect of Dispersion on Tape Casted Green Sheet Prepared from Bimodal-Type AlN Powders Hong-Soo

More information

untitled

untitled G Journal of the Korea Concrete Institute Vol. 20, No. 3, pp. 345~356, June, 2008 p -k w gj p k k 1) Á y 2) * 1) ƒm w w 2) w w Direct Inelastic Design of Reinforced Concrete Members Using Strut-and-Tie

More information

07.045~051(D04_신상욱).fm

07.045~051(D04_신상욱).fm J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 45-51 f m s p» w Á xá zá Ÿ Á w m œw Image Retrieval Based on Gray Scale Histogram Refinement and Horizontal Edge Features Sang-Uk Shin,

More information

fm

fm Journal of the Korea Concrete Institute Vol. 24, No. 1, pp. 015~023, February, 2012 GGGGG http://dx.doi.org/10.4334/jkci.2012.24.1.015 인장증강효과에기반한콘크리트구조부재의사용성능검증» 1) Á½ 2) Á½ 2) Á y 3) * 1) w m 2) û w m

More information

49(6)-06.fm

49(6)-06.fm Journal of the Korean Chemical Society 2005, Vol. 49, No. 6 Printed in the Republic of Korea 중학교과학교과서불꽃반응실험에서선스펙트럼관찰의문제점분석및개선연구 ½ Á Á * w w yw (2005. 10. 4 ) An Analysis and Improvement of the Line Spectrum

More information

16(4)-05.fm

16(4)-05.fm w m y Vol. 16(4), p. 53~61, 2011 œ 광물찌꺼기에함유된오염물질의안정화를위한표면차폐재의성능평가 ½ ³ 1 Á 1 *Á½ 2 Á½ 2 Á 3 Á 3 1 w œ w œw, 2 ( ) f lp, 3 w Ÿw œ Ÿw» Evaluation of Surface Water-preventing Materials on Stabilization of

More information

57.fm

57.fm Journal of the Korean Ceramic Society Vol. 45, No. 6, pp. 336~344, 2008. Rheological Properties of Cement Paste Blended Blast Furnace Slag or Fly Ash Powder Jong Taek Song, Hyo Sang Park, Seung Ho Byun,

More information

( )-123.fm

( )-123.fm Journal of the Korean Ceramic Society Vol. 48, No. 1, pp. 63~68, 2011. DOI:10.4191/KCERS.2011.48.1.063 Effects of Substituting B 2 O 3 for P 2 O 5 on the Structure and Properties of SnO-P 2 O 5 Glass Systems

More information

50(6)-03.fm

50(6)-03.fm Journal of the Korean Chemical Society Printed in the Republic of Korea w yw w w ½ Á Áw Á k * w yw w w w w w (2006. 8. 9 ) Relationship between Conceptual Understanding and Mapping Errors Induced in Learning

More information

19(5)-04[57].fm

19(5)-04[57].fm J. Kor. Powd. Met. Inst., Vol. 19, No. 5, 2012 DOI: 10.4150/KPMI.2012.19.5.348 pk gqd p d e x w y ûá Á½x a Á x b Á» w œw, a sw w, b w» Effects of Powder Morphology and Powder Preheating on the Properties

More information

KAERIAR hwp

KAERIAR hwp - i - - ii - - iii - - iv - - v - - vi - Photograph of miniature SiC p-n and Schottky diode detector Photograph SiC chip mounted on a standard electrical package Photograph of SiC neutron detector with

More information