연속다공질 SiC-Si 3 N 4 복합체의 미세구조 및 기계적 특성

Paul Rajat Kanti; Asit Kumar Gain; 이희정; 장희동; 이병택; Paul Rajat Kanti; Asit Kumar Gain; Hee-Jung Lee; Hee-Dong Jang; Byong-Taek Lee

Korean Journal of Materials Research, Vol.16, No.3, 188-192, March, 2006

DOI10.3740/MRSK.2006.16.3.188 Export Citation

연속다공질 SiC-Si 3 N 4 복합체의 미세구조 및 기계적 특성

Microstructure Control and Mechanical Properties of Continuously Porous SiC-Si 3 N 4 Composites

Paul Rajat Kanti, Asit Kumar Gain, 이희정, 장희동¹, 이병택^†

공주대학교 신소재공학부
¹한국지질자원연구원 자원활용소재연구부

Paul Rajat Kanti, Asit Kumar Gain, Hee-Jung Lee, Hee-Dong Jang¹, and Byong-Taek Lee^†

School of Advanced Materials Engineering, Kongju National University, Korea
¹Korea Institute of Geoscience and Mineral Resources (KIGAM), Korea

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The microstructures and mechanical properties of continuously porous [Math Processing Error] composites fabricated by multi-pass extrusion were investigated at different Si levels added. Si-powder with different weight percentages (0%, 5%, 10%, 15%, 20%) was added to the SiC powder to make the raw mixture powders, with [Math Processing Error] as sintering additives, carbon ( [Math Processing Error] ) as a pore-forming agent, ethylene vinyl acetate as a binder and stearic acid ( [Math Processing Error] ) as a lubricant. In the continuously porous [Math Processing Error] composites, [Math Processing Error] whiskers like the hairs of nostrils were frequently observed on the wall of the pores. In this study, the morphology of the [Math Processing Error] whiskers was investigated with the silicon addition content. In the composites containing of 10 wt% Si, a large number of [Math Processing Error] whiskers was found at the continuous pore regions. In the sample to which 15 wt% Si powder was added, maximum values of about 101 MPa bending strength and 57.5% relative density were obtained.

Keywords:[Math Processing Error] composite;[Math Processing Error] whisker;Porous body

[References]

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Lee BT, Kim HD, Mater. Trans. JIM, 37, 1547 (1996)
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[1] Lee BT, Jang DH, Kim TS, J. Eur. Ceram. Soc., 24, 2313 (2004)

[2] Lee BT, Jeong HG, Hiraga K, Mater. Trans. JIM, 43, 19 (2002)

[3] Lee SY, Lee BT, Ceram. Trans., 93, 51 (1998)

[4] Gain AK, Han JK, Jang HD, Lee BT, J. Eur. Ceram. Soc. (2005)

[5] Miyakawa N, Sato H, Maeno H, Takahashi H, JSAE Review, 24, 269 (2003)

[6] Silva PC, Figueiredo JL, Mater. Chem. Phys., 72(3), 326 (2001)

[7] Kawai C, Yamakawa A, Ceram. Int., 24, 135 (1998)

[8] Gao N, Watari K, Kume S, Ando Y, Ryo S, Itoh H, J. Eur. Ceram. Soc., 26, 837 (2006)

[9] Farries PM, Bullock E, Rawlings RD, J. Mater. Sci. Lett., 18(21), 1727 (1999)

[10] Zhang YH, Mater. Res. Bull., 39(3), 401 (2004)

[11] Lee BT, Kang IC, Cho SH, Song HY, J. Am. Ceram. Soc., 88(8), 2262 (2005)

[12] Lee BT, Kim KH, Han JK, J. Mater. Res., 19, 3234 (2004)

[13] Lee BT, Jang DH, Kang IC, Lee CW, J. Am. Ceram. Soc. (2005)

[14] Lee BT, Kim HD, Mater. Trans. JIM, 37, 1547 (1996)

[15] Li JF, Satomi S, Watanabe R, Omori M, Hirai T, J. Eur. Ceram. Soc., 20, 1795 (2000)