한국윤활학회:학술대회논문집 (Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference)
- 한국윤활학회 2002년도 제35회 춘계학술대회
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- Pages.248-254
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- 2002
압입 시험에 의한 플라즈마 세라믹 용사코팅의 특성 평가
Evaluation of the characteristics of plasma sprayed ceramic coatings by Indentation test
- Choi, Se-Young (Graduate School, Department of Mechanical Engineering, Kyungpook National University) ;
- Chae, Young-Hun (Engineering Tribology Research Institute in Kyungpook National University) ;
- Kim, Seock-Sam (School of Mechanical Engineering, Kyungpook National University)
- 발행 : 2002.05.16
초록
The most controversial topics in plasma sprayed ceramic coating system are recently mechanical properties such as bond strength, cohesive strength, toughness and so on. Determination of bond strength of coatings is one of the most important problems. In the industry, the bond strength of coating system has been estimated by Pull-off test(ASTM standard C633-79). But, without a fixed jig and specimen, it is impossible to obtain the bond strength. Therefore, it is necessary to study the critical fracture load on interface of the coating by indentation test. Because the critical fracture load plays an important role in evaluating the bond strength for plasma sprayed ceramic coating system. So, we have estimated critical fracture load in plasma sprayed ceramic coating system, and it was shown that inverse relationship between the cross-section hardness of coating and the critical fracture load(Pc). In case of the high load(1kgf, 2kgf) in
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