Si 3 N 4 /SiC 복합 세라믹의 온도에 따른 크랙 힐링 관찰과 확산거동

송오성; 안도 코토지; 다카하시 코지; 나가오 와타루; 류지호; Ohsung Song; Kotoji Ando; Koji Takahashi; Wataru Nakao; Jiho Ryu

Korean Journal of Materials Research, Vol.15, No.12, 780-785, December, 2005

DOI10.3740/MRSK.2005.15.12.780 Export Citation

Si 3 N 4 /SiC 복합 세라믹의 온도에 따른 크랙 힐링 관찰과 확산거동

Crack Healing Behavior with Healing Temperature in Si 3 N 4 /SiC Composite Ceramics

송오성 ^†, 안도 코토지¹, 다카하시 코지¹, 나가오 와타루¹, 류지호²

서울시립대학교 신소재공학과
¹요코하마국립대학교 물질에네르기안전공학과
²아주자동차대학 자동차계열

Ohsung Song^†, Kotoji Ando¹, Koji Takahashi¹, Wataru Nakao¹, and Jiho Ryu²

Department of Materials Science and Engieering, University of Seoul, Seoul 130-743, Korea
¹Department of Engergy and Safety Engineering, Yokohama National University, 79-5, Hodogaya, Yokohama, Japan, Korea
²Division of Automobile, Ajou Motor College, Boryeong 355-769, Korea

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To investigate the microcrack healing behavior of [Math Processing Error] composite ceramics(SNCY8), we observe the crack length evolution a! the time of 20, 40, 60 minutes with in-situ optical microscopy by varying healing temperature of [Math Processing Error] . Crack healing obviously occurred as heating temperature and time increased. We proposed a simple model of effective diffusion based on the crack length evolution with healing condition, and determined the effective diffusion coefficient as Our result implies that we may predict the healing ability quantitatively with temperature and time in structural ceramics through the effective diffusion coefficient model.

Keywords:crack healing;healing temperature;diffusion coefficient;surface crack

[References]

Lange FF, Gupta TK, J. Am. Ceram. Soc., 53, 5455 (1970)
Gupta TK, J. Am. Ceram. Soc., 59(1-2), 259 (1976)
Yao F, Ando K, Chu MS, Sato S, J. Eur. Ceram. Soc., 21, 991 (2001)
Houjou K, Ando K, Liu SP, Sato S, J. Eur. Ceram. Soc., 24, 2329 (2004)
Kim YW, Ando K, Chu MC, J. Am. Ceram. Soc., 86(3), 465 (2003)
Kim YW, Mitomo M, Nishimura T, J. Am. Ceram. Soc., 84(9), 2060 (2001)
Ando K, Chu MC, Tsuji K, Hirasawa T, Kobayashi Y, Sato S, J. Eur. Ceram. Soc., 22, 1313 (2002)
Ando K, Chu MC, Matsushita S, Sato S, J. Eur. Ceram. Soc., 23, 977 (2003)
Ando K, Houjyou K, Chu MC, Takeshita S, Takahashi K, Sakamoto S, Sato S, J. Eur. Ceram. Soc., 22, 1339 (2002)
Ando K, Chu MC, Yao F, Sato S, Fatigue Fract. Eng. Mater. Struct., 88, 897 (1999)
Ando K, Shirai Y, Nakatani M, Kobayashi Y, Sato S, J. Eur. Ceram. Soc., 22, 121 (2002)

[Related Articles]

[1] Lange FF, Gupta TK, J. Am. Ceram. Soc., 53, 5455 (1970)

[2] Gupta TK, J. Am. Ceram. Soc., 59(1-2), 259 (1976)

[3] Yao F, Ando K, Chu MS, Sato S, J. Eur. Ceram. Soc., 21, 991 (2001)

[4] Houjou K, Ando K, Liu SP, Sato S, J. Eur. Ceram. Soc., 24, 2329 (2004)

[5] Kim YW, Ando K, Chu MC, J. Am. Ceram. Soc., 86(3), 465 (2003)

[6] Kim YW, Mitomo M, Nishimura T, J. Am. Ceram. Soc., 84(9), 2060 (2001)

[7] Ando K, Chu MC, Tsuji K, Hirasawa T, Kobayashi Y, Sato S, J. Eur. Ceram. Soc., 22, 1313 (2002)

[8] Ando K, Chu MC, Matsushita S, Sato S, J. Eur. Ceram. Soc., 23, 977 (2003)

[9] Ando K, Houjyou K, Chu MC, Takeshita S, Takahashi K, Sakamoto S, Sato S, J. Eur. Ceram. Soc., 22, 1339 (2002)

[10] Ando K, Chu MC, Yao F, Sato S, Fatigue Fract. Eng. Mater. Struct., 88, 897 (1999)

[11] Ando K, Shirai Y, Nakatani M, Kobayashi Y, Sato S, J. Eur. Ceram. Soc., 22, 121 (2002)