Multi-layer Coating for Improvement Anti-wear Property of Graphite

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J. Korean Ceram. Soc. > Volume 31(8); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(8): 874.

흑연의 내마모성 증진을 위한 다층 코팅

서임춘, 김동일, 예병한¹, 정발¹, 박종욱

한국과학기술원 전자재료공학과
¹국방과학연구소

Multi-layer Coating for Improvement Anti-wear Property of Graphite

ABSTRACT

To increase the anti-oxidation and anti-wear properties of graphite for the propellant-burning environment, SiC, Pt and Al2O3 multi-layer coatings were conducted succesisvely and the optimum condition was researched. The SiC layer was produced by pack cementation and SiC layer in thickness of 30 ${mu}{textrm}{m}$ coating was produced after coating for 6 hours. Pt layer was coated by sputtering, and the Al2O3 layer was coated by reactive sputtering. the thickness of Pt layer and Al2O3 layer was less than one-tenth of that of SiC layer. The pack coated specimens and multi-layer coated specimens were made using above conditions and test-fired. The test result showed that the wear rate of SiC layer is approximately 1/10 compared to that of uncoated graphite.