A Study on the Subcritical Crack Growth and the Life Prediction for Sintered Silicon Carbide

,; ,; ,; ,; ,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 22(4); 1985 > Article

Journal of the Korean Ceramic Society 1985;22(4): 26.

소결탄화규소의 완속균열성장 및 수명예측에 관한 연구

한원식, 김영욱, 이상호¹, 장감용¹, 이준근

한국과학기술원 재료공학부
¹쌍용중앙연구소

A Study on the Subcritical Crack Growth and the Life Prediction for Sintered Silicon Carbide

ABSTRACT

The subcritical crack growth of sintered SiC is investigated under various corrosive atmospheres such as distilled water Murakami solution and saturated KOH solution. The KI-V diagrams are obtained by the load relaxation method and incremental displacement rate method using the double torsion technique. The obtained fracture mechanics parameters (n) of sintered SiC are 79 in Murakami solution and 39 in saturated KOH solution. These data indicate that the subcritical crack growth of sintered SiC is taking place in these two conditions and the stress-corrosion cracking is suggested to be the mechanism. With these KI-V diagrams the life of sintered SiC in these conditions is predicted.