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J. Korean Ceram. Soc. > Volume 35(1); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(1): 48.
질화규소 이층 층상재료에서 코팅층의 파괴에 관한 연구 : II Coating Thickness의 영향
이기성, 이승건1, 김도경
한국과학기술원 재료공학과
A Study on the Coating Fracture in Silicon Nitride Bilayer : II. Effect of Coating Thickness
The effect of coating thickness on the contact fracture was studied, in Si3N4 coated Si3N4-BN system When the elastic/plastic mismatch is relatively large betwen two layers in bilayer certain critical coating thickness was required to prevent cone crack initiation and this critical thickness was decreased by de-creasing the elastic/plastic mismatch,. In addition the required critical thickness should be increased when higher loads apply. In conclusion an appropriate coating thickness should be designed by elastic/plastic mismatch between two layers and environment (applied load) to prevent the coating fracture,
Key words: Coating fracture, Coating thickness, Elastic/Plastic Mismatch, Hertzian indentation
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