Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지
DOI QR코드

DOI QR Code

Crack Healing Behavior with Healing Temperature in Si3N4/SiC Composite Ceramics

Si3N4/SiC 복합 세라믹의 온도에 따른 크랙 힐링 관찰과 확산거동

  • Song, Oh-Sung (Department of Materials Scienced and Engineering, University of Seoul) ;
  • Ando, Kotoji (Department of Energy and Safety Engineering, Yokohama National University) ;
  • Takahashi, Koji (Department of Energy and Safety Engineering, Yokohama National University) ;
  • Nakao, Wataru (Department of Energy and Safety Engineering, Yokohama National University) ;
  • Ryu, Ji-Ho (Division of Automobile, Ajou Motor College)
  • Published : 2005.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

To investigate the microcrack healing behavior of $Si_3N_4-20wt\%SiC-8wt\%Y_2O_3$ 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 $800\~1200^{\circ}C$. 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

References

  1. F. F. Lange and T. K. Gupta, J. Am. Ceram. Soc., 53, 5455 (1970)
  2. T. K. Gupta, J. Am. Ceram. Soc., 59(1-2), 259-262 (1976) https://doi.org/10.1111/j.1151-2916.1976.tb10949.x
  3. F. Yao, K. Ando, M. C. Chu and S. Sato, J. Eur. Ceram. Soc., 21, 991-997 (2001) https://doi.org/10.1016/S0955-2219(00)00279-X
  4. K. Houjou, K. Ando, S. P. Liu and S. Sato, J. Eur. Ceram. Soc., 24, 2329-2338 (2004) https://doi.org/10.1016/S0955-2219(03)00645-9
  5. Y. W. Kim, K. Ando and M. C. Chu, J. Am. Ceram. Soc., 86(3), 465-470 (2003) https://doi.org/10.1111/j.1151-2916.2003.tb03322.x
  6. Y. W. Kim, M. Motomo and T. Nishimura, J. Am. Ceram. Soc., 84(9), 2060-2064 (2001) https://doi.org/10.1111/j.1151-2916.2001.tb00958.x
  7. K. Ando, M. C. Chu, K. Tsuji, T. Hirasawa, Y. Kobayashi and S. Sato, J. Eur, Ceram, Soc., 22, 1313-1319 (2002) https://doi.org/10.1016/S0955-2219(01)00431-9
  8. K. Ando, M. C. Chu, S. Matsushita and S. Sato, J. Eur. Ceram. Soc., 23, 977-984 (2003) https://doi.org/10.1016/S0955-2219(02)00232-7
  9. K. Ando, K. Houjyou, M. C. Chu, S. Takeshita, K. Takahashi, S. Sakamoto and S. Sato, J. Eur. Ceram. Soc., 22, 1339-1346 (2002) https://doi.org/10.1016/S0955-2219(01)00435-6
  10. K. Ando, M. C. Chu, F. Yao and S. Sato, Fatigue Fract. Eng. Mater. Struct., 22, 897-903 (1999) https://doi.org/10.1046/j.1460-2695.1999.00210.x
  11. K. Ando, Y. Shirai, M. Nakatani, Y. Kobayashi and S. Sato, J. Eur. Ceram. Soc., 22, 121-128 (2002) https://doi.org/10.1016/S0955-2219(01)00236-9