64.fm

Size: px
Start display at page:

Download "64.fm"

Transcription

1 Journal of the Korean Ceramic Society Vol. 44, No. 7, pp. 375~380, Tribological Properties of Carbon Layers Produced by High Temperature Chlorination in Comparison with DLC Coating Hyun-Ju Choi, Heung-Taek Bae, Byung Chul Na,* Jeon-Kook Lee** and Dae-Soon Lim Division of Materials Science and Engineering, Korea University, Seoul , Korea *Energy Technology Research Center, KATECH, Chon An , Korea **Thin Film Materials Research Center, KIST, Seoul , Korea (Received July 5, 2007; Accepted July 20, 2007) DLC gq š w k Tribological p x Á káù *Á **Á š w œw * t t l **w w» l ( ; ) ABSTRACT Tribological properties of carbon layers produced by high temperature chlorination of SiC ceramic and DLC (diamond-like carbon) coatings produced by ion plating method were investigated and compared. Carbon coatings were produced by exposure of ball and disc type SiC in chlorine and hydrogen gas mixtures at 1200 o C. After treatment for 10 h, dense carbon films up to 180 µm in thickness were formed. Tribological behavior of newly developed carbon films were compared with that of DLC films. Wear resistance and frictional coefficient of the surface modified ball and disc type SiC were significantly improved compared to an untreated SiC specimen, and also the modified carbon layer had better performance than DLC coatings. Therefore, in this study, the newly developed carbon films have several advantages over existing carbon coatings such as DLC coatings and showed superior tribological performances. Key words : Silicon carbide, DLC, Chlorination, Wear volume, Friction coefficient 1. SiC, TiC, Si 3 N 4 w yw, š, šü p š, š œ, š w y w ü t z š. 1) w w», yw, p wš y k ü» w e w w y w w. 2) w w» w TiC, TiN, MoS 2 p ƒw ù, DLC(diamond-like carbon)ù TiC t gqw ƒ w. 3,4) DLC w w y p w ü t z Corresponding author : Dae-Soon Lim Tel : Fax : t š ù š š. ù DLC 500 y(thermal degradation)» w š. w 10 GPa w Ì ƒƒ š. DLC gqw ü t w» w w» ƒ w w. ¾ 5,6) w w š w w ƒ. SiC š w k t d ü p w ƒ š š. 7,8)», CDC(carbide-derived carbon) substrate gqw ƒ w SiC etching k Ì y ky³ t ù k g k û w. k ky³ ƒ yw w k d w x» gq» (adhesion) 375

2 376 x Á káù Á Á ƒ. ü t k d w û ü p p w w tribology p». 9) CDC g q d tribology p w ƒ w š š ù, Si 3 N 4 SiC w DLC gq d CDC gq d tribology p w š š. 10) ky³ gq DLC ky³ l x CDC SiC Si 3 N 4 w ñ g tribology p wš wš w. 2. x 2.1. k x w w ky³ disc( 20 mm, Ì 3 mm) xk ƒœw., w œ furnace k z,, š ƒ w š w r w. p x ky³ t w g k j» w Ar-5 ~ 10% Cl 2 Ar-5 ~ 10% Cl ~5% H 2 yw ƒ w, š g. x w t Si w w CCl 4 xk w SiCl 4 x k š, t k û w CDC xk k x j. r 1200 o C w, 10 k z þƒ e, z ùƒš û k w y k w. r DLC gq (C 6 H 6 ) v p y jš, e bias ky³ disc DLC x y w. 200 C o ww ƒ w r t k w» w, Raman spectroscopy(labram HR model, Jobin -Yvon, France) w nm q Ar-ion laser g»(excitation) rp - w. w, X-ray diffractometry (XRD) w gq w. r Ì ü w» w Scanning Electron Microscopy(Hitachi S-4300, field emission SEM) Energy Dispersive Spectroscopy(Horiba EX -200, EDS) w d 20 mm Ì 3mm ƒœ disc r gq DLC CDC 6.35 mm Si 3 N 4 SiC w ball-on-plate x ww m/s w w. x - x 5z w, d 30 l pƒ óù z Ÿw x w ball j» w. k x x k j» w» w ¼ d w s³ w. š r w y w N ƒ w ƒ j w r 6 12z d w. 3. š 3.1. t rt q wš XRD w Fig. 1 ùkþ. Moissanite-6H bulk SiC w rhombohedral graphite. w DLC graphite vjƒ w xk y w. Fig. 2 t r t k w» w Raman w ùkþ. t (a) bulk SiC x Si-C w 789 cm cm 1 e vjƒ š, r (b) DLC vjƒ y w 1550 cm cm 1 e. 11) w, (c) t r XRD Fig. 1. XRD patterns of SiC, DLC coating, and modified carbon layer (CDC). w wz

3 DLC gq š w k Tribological p 377 Fig. 2. Micro-Raman spectra of (a) untreated SiC, (b) DLC, and (c) modified carbon coatings. Fig. 3. Cross-sectional images of the fracture surface of DLC and modified carbon coatings. t k C-C w wš disordered graphite D vj G vjƒ š š e ƒƒ cm cm 1. gq d Ì w» w SEM w Fig. 3 ùkþ. r DLC Ì 1µm, ƒ w r 180 µm. CDC d SEM-EDX SiCƒ w š k y y w Tribology p Fig. 4 ƒ k w SiC SiC gq DLC CDC v y ùküš. Fig. 4(a) Si 3 N 4 ñ x w, SiC r w ƒ ù ù 2N w w ƒ ùš. w CDC r 6N¾ w ƒ ù. DLC r 2N¾ w CDC w û ù, z w Fig. 4. Variation of wear volume as a function of applied load for SiC, DLC, and CDC coatings with a (a) Si 3 N 4 and (b) SiC ball. Wear tests were conducted using a steploading procedure by the ball-on-disk type wear tester. ƒw SiC w xk ƒ w ƒ. 4.5 N DLC ü w w w. Fig. 4(b) SiC xw, Si 3 N 4 w w w ù v SiC DLC r ƒ { w w. Si 3 N 4 SiC» w. Si e g k y³ œ ü š. 12) w» w ky³ w û. Fig. 4 ƒ (abrasive wear) k š. Fig. 5 Si 3 N 4 w ƒw w y ùkþ. gq w ky³ w ƒ k «7y(2007)

4 378 x Á káù Á Á Fig. 5. Variation of frictional coefficient as a function of sliding time and applied load for SiC, DLC, and CDC discs with a Si 3 N 4 ball. Fig. 6. Variation of frictional coefficient as a function of sliding time and applied load for SiC, DLC, and CDC discs with a SiC ball. w wz

5 DLC gq š w k Tribological p ¾ y. ù j gq DLC CDC 0.2 w û y. yw w Ì gqw w w, w DLC œ ü p û w Ì ƒ w 1µm Ì gqw» y w. DLC p x DLC CDC w w. DLC ú ƒw w (fluctuating) w. DLC Ì w w gq d x y j w». w, w t k CDC Si 3 N 4 w xw ƒ w û 0.16 w. Fig. 6 SiC w ƒw w y š. ky³ xw , Fig. 5 w ƒ y³ w Fig. 7. SEM micrographs of the worn disc surfaces of (a) SiC, (b) DLC, and (c) CDC wear tracks with a Si 3 N 4 ball, and corresponding magnified images (d) ~ (f). Fig. 8. SEM micrographs of the worn disc surfaces of (a) SiC, (b) DLC, and (c) CDC wear tracks with a SiC ball, and corresponding magnified images (d) ~ (f). û. wr, DLC y gqw r w û û ƒ. w, ü Ì w x w š y». ù k CDC Si 3 N 4 w xw Fig. 5 w DLC w x w 0.1 w. Fig. 7 Fig. 4(a) y³ w xw x w. (a) ~ (c) SiC DLC š CDC disc p (d) ~ (f) ƒƒ p y w. Fig. 4(a) SiC DLC š w ƒw w, p 6N¾ w ƒw w ƒ û. w DLC y (e) gq ü w gq d ƒ û. w CDC ñ. Fig. 8 Fig. 4(b) ky³ w xw x 44«7y(2007)

6 380 x Á káù Á Á w. w t y³ w w. ù p. SEM w mw ky³ ƒ j y³ k y³ abrasive wearƒ w û y w. 13) 4. ü p k w» w 1200 o C š w graphite 180 µm Ì CDC w. SiC Si 3 N 4 w SiC gq DLC CDC - p y k ww š w w. ky³ disc w Si 3 N 4 tribology sƒ abrasive wear p. w DLC gq d ü p ù, Ì w ü w w gq d. t k w r w 1/5 ƒ w û, v 50% w. ƒ, SiC gq DLC r š w k w w û ü w. Acknowledgments t t l»». REFERENCES (1996). 2. B. Bhushan and B. K. Gupta, Handbook of Tribology: Materials, Coating and Surface Treatments; McGraw-Hill Inc., New York, Y. C. LUO and D. Y. LI, New Wear-Resistant Material: Nano-TiN/TiC/TiNi Composite, J. Mater. Sci., (2001). 4. H. Hyuga, M. I. Jones, K. Hirao, and Y. Yamauchi, Tribological Behavior of a Si 3 N 4 /Carbon Short Fiber Composite under Water Lubrication, J. Am. Ceram. Soc., 87 [4] (2004). 5. A. Grill, Tribology of Diamond-like Carbon and Related Materials: An Updated Review, Surface and Coatings Technology, (1997). 6. K. Jia, Y. Q. Li, T. E. Fischer, and B. Gallois, Tribology of Diamond-like Carbon Sliding Against Itself, Silicon Nitride, and Steel, J. Mater. Res., 10 [6] (1995). 7. Y. Gogotsi, S. Welz, D. A. Ersoy, and M. J. McNallan, Conversion of Silicon Carbide to Crystalline Diamondstructured Carbon at Ambient Pressure, Nature, (2001). 8. Y. Gogotsi, I. D. Jeon, and M. J. McNallan, Carbon Coatings on Silicon Carbide by Reaction with Chlorine-containing Gases, J. Mater. Chem., 7 [9] (1997). 9. A. Erdemir, A. Kovalchenko, M. J. McNallan, S. Welz, A. Lee, Y. Gogotsi, and B. Carroll, Effects of High-temperature Hydrogenation Treatment on Sliding Friction and Wear Behavior of Carbide-derived Carbon Flms, Surface & Coatings Technology, (2004). 10. A. Erdemir, The Role of Hydrogen in Tribological Properties of Diamond-like Carbon Films, Surface and Coatings Technology, (2001). 11. G. Irmer and A. Dorner-Reisel, Micro-Raman Studies on DLC Coatings, Advanced Engineering Materials, 7 [8] (2005). 12. S. S. Hwang, S. W. Park, J. H. Han, K. S. Han, and C. M. Kim, Mechanical Properties of Porous Reaction Bonded Silicon Carbide(in Korean), J. Kor. Ceram. Soc., 39 [10] (2002). 13. G. W. Stachowiak and A. W. Batchelor, Engineering Tribology; second edition, pp , Butterworth-Heinemann, USA, S. M. Hsu and M. C. Shen, Ceramic Wear Maps, Wear w wz

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

14.531~539(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

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

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

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

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

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

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

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

( )-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

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

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

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

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

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

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

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

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

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

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

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

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

(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

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

03.fm

03.fm 29«6y (2009. 12) 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,

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

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

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

72.fm

72.fm Journal of the Korean Ceramic Society Vol. 45, No. 8, pp. 472~476, 2008. Multi-layered Coating Deposited on PEMFC (Proton Exchange Membrane Fuel Cell) Bipolar Plates Young-Hoon Yun, Hoon-Taek Chung, In-Su

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

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

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

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

( )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

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

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

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

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

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

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

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

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

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

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

( )-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

( )-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 Synthesis and structural analysis of nano-semiconductor material 2005 2 Synthesis and structural analysis of nano-semiconductor material 2005 2 . 2005 2 (1) MOCVD ZnO (2) MOCVD gallium oxide < gallium

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

( )-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

( )80(배흥택).fm

( )80(배흥택).fm Jurnal f the Krean Ceramic Sciety Vl. 6, N. 5, pp. 515~519, 009. DOI:10.191/KCERS.009.6.5.515 Estimatin f Triblgical Prperties n Surface Mdified SiC by Chlrine Gas Reactin at Varius Temperatures Heung-Taek

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

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

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

00....

00.... Fig. 1 2.5%. 51.5%, 46.0%,.. /, Table 1 (U.V.; Ultraviolet 10-400 nm)/ (NIR; Near Infrared 700 nm - 5 µm) ( TiO 2, WO 3, ZnO, CeO, ATO, Sb 2O 3-ZnO, ITO.) (400 nm - 780 nm). /. Fig. 1.. 23 Table 1. / /

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

( )-44.fm

( )-44.fm Journal of the Korean Ceramic Society Vol 47, No, pp 6~67, 010 DOI:104191/KCERS010476 The Properties and Uniformity Change of Amorphous SiC:H Film Deposited using Remote PECVD System with Various Deposition

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

10.fm

10.fm Jurnal f the Krean Ceramic Sciety Vl., N. 1, pp. 53~57, 2009. Effect f MgB Additin n Synthesis f Hexagnal Brn Nitride Dae-Jin Lee*, **, Mi-Jung Jee*, Byung-Hyun Chi*, Mi-Jai Lee*, Nam-Hee Ch**, and Mi-Sun

More information

62.fm

62.fm Journal of the Korean Ceramic Society Vol. 45, No. 7, pp. 395~400, 2008. Preparation and its Characteristics of Fly Ash-based Geopolymeric Mortar using Low Grade Silica Waste Se Gu Son, Seung Yeob Hong,

More information

Æ÷Àå½Ã¼³94š

Æ÷Àå½Ã¼³94š Cho, Mun Jin (E-mail: mjcho@ex.co.kr) ABSTRACT PURPOSES : The performance of tack coat, commonly used for layer interface bonding, is affected by application rate and curing time. In this study, bonding

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

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

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

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

107.fm

107.fm Journal of the Korean Ceramic Society Vol. 44, No. 11, pp. 650~654, 007. Synthesis and Photoactivity of SnO -Doped TiO Thin Films Miewon Jung*, ** and Yunjung Kwak*, ** *Department of Chemistry, Sungshin

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

( )-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

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

04-42(1)-09(김동원).fm

04-42(1)-09(김동원).fm 21 w t œwz J. Kor. Inst. Surf. Eng. Vol. 42, No. 1, 2009. < > PET»q SiO 2 rd ITO» Ÿw p a, ½ a, ³ a, a, y b a» w œw, b ( ) w p A Study on Adhesion and Electro-optical Properties of ITO Films Deposited on

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

95.fm

95.fm Journal of the Korean Ceramic Society Vol. 44, No. 10, pp. 580~584, 2007. Properties of Chemical Vapor Deposited ZrC coating layer for TRISO Coated Fuel Particle Jun Gyu Kim, E-Sul Kum, Doo Jin Choi, Young

More information

( )-40.fm

( )-40.fm Jurnal f the Krean Ceramic Sciety Vl. 47, N. 3, pp. 237~243, 2010. DOI:10.4191/KCERS.2010.47.3.237 Synthesis f Sphene pink Pigment by Rice Husk Ash In-Dn J, Hyun-S Lee, and Byung-Ha Lee Department f Materials

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

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

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

( )-77.fm

( )-77.fm Journal of the Korean Ceramic Society Vol. 47, No. 5, pp. 407~411, 2010. DOI:10.4191/KCERS.2010.47.5.407 Physical Properties of ALC with Various Fineness of Quartzite Yong Sik Chu, Ui Jong Jung, Hun Song,

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

18103.fm

18103.fm J. of the Korean Sensors Society Vol. 18, No. 1 (009) pp. 8 3 VO w PCM yá Á Á Ÿ Built-in protection circuit module by using VO temperature sensors K. H. Song, J. B. Choi, M. W. Son, and K. S. Yoo Abstract

More information

국706.fm

국706.fm Carbon Science Vol. 7, No. 4 December 2006 pp. 271-276 Effect of Heating Rate and Pressure on Pore Growth of Porous Carbon Materials Kwang Youn Cho, Kyong Ja Kim and Doh Hyung Riu Division of Nano Materials

More information

75.fm

75.fm Journal of the Korean Ceramic Society Vol. 44, No. 8, pp. 451~456, 2007. A Study of Sintering Behavior and Crystallization in Li 2 O-Al 2 -SiO 2 (LAS) Glass System by RSM Kyu Ho Lee, Young Seok Kim, Young

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

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

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

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

18(3)-09(34).fm

18(3)-09(34).fm Journal of Korean Powder Metallurgy Institute Vol 18 No 011 DOI: 104150/KPMI0111877 s WC-Co w g p w LiCoO w bá½ a* a cáv y aw» l bw» c w» l œw Synthesis of LiCoO Powders using Recycled Cobalt Precursors

More information

(1)-01(정용식).fm

(1)-01(정용식).fm Textile Science and Engineering Vl. 48, N. 1, 2011 ƒ s j p y ky w xá½ Á½» 1 Á w œ w lœw, 1 w» w (2010. 12. 10. /2011. 1. 16. k) Analysis f Stabilizatin and Carbnizatin Behavirs f Ply(acrylnitrile) Fibers

More information

Æ÷Àå82š

Æ÷Àå82š Lee, Kyungbae (E-mail : kblee6078@ex.co.kr) Lee, Jaehoon (E-mail : ranian74@ex.co.kr) Sohn, Duecksu (E-mail : mgsds@ex.co.kr) Kwon, Soonmin (E-mail : soonmini2@ex.co.kr) ABSTRACT PURPOSES : The purpose

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4)

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4) THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 799 804. http://dx.doi.org/10.5515/kjkiees.2018.29.10.799 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Method

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

( )-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

( )-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

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

(159번 어혜진).fm

(159번 어혜진).fm Journal of the Korean Ceramic Society Vol. 48, No. 4, pp. 298~302, 2011. DOI:10.4191/KCERS.2011.48.4.298 Synthesis of Cr-doped Pyrochlore-type Pigments and Coloring in Glazes Hye-Jin Eo and Byung-Ha Lee

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

50(3)-07.fm

50(3)-07.fm Journal of the Korean Chemical Society Printed in the Republic of Korea 열처리에의해가교된다공성키토산 - 알지네이트 - 젤라틴지지체의특성 Áw Á w Á Á Á * w yw q ³ w w w (2006. 3. 30 ) Characteristics of porous Chitosan-Alginate-Gelatin

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

139.fm

139.fm Jurnal f the Krean Ceramic Sciety Vl. 43, N. 12, pp. 839~845, 2006. Manufacture f High Density Graphite Using Cal Tar Pitch Kwang Yun Ch, Kyung Ja Kim, Dh Hyung Riu, Kwang Hyun Lim,* Jung Il Kim,* In Chel

More information

17(1)-06.fm

17(1)-06.fm Krean J. Crystallgraphy Vl., N. 1, pp.14~18, 006 LP-MOCVD w ZnO ù Ÿw p Á yá * w w» w» l Structural and Optical Prperties f ZnO Nanwires Synthesized by LP-MOCVD Prcess Yung-Jin Chi, Jae-Hwan Park and Jae-Gwan

More information