Evaluating Adhesion of Ceramic Coatings by Scratch Testing

摘要：

　　Adhesion is one of the most important mechanical properties of ceramic coatings.Scratch testing is considered as a simple and effective method to evaluate adhesion of ceramic coatings.In this paper,the critical normal forces and scratch morphologies for different coating-substrate systems were studied by scratch testing.It is shown that the critical normal force obtained by acoustic emission (AE) signals decreases from 12 N to 7 N when the applied normal force rate increases from 20 N/min to 100 N/min for deposited SiC coating on C by CVD,and the failure area of this scratched sample increases with increasing maximum normal force.Based on scratch morphologies,spallation or delamination can be observed for hard-brittle coatings on glass or metal,while discontinuous or continuous ductile perforation can be observed for ductile coatings on metal.The critical normal force for hard-brittle coatings can be effectively obtained by AE signals.

关键词： Ceramic coatings Adhesion Scratch testing Acoustic emission

作者: Kunming Li Yiwang Bao Detian Wan Yanli Huo Jinyi Wu

作者单位: Key State Lab of Green Building Materials,China Building Materials Academy,Beijing 100024,China Ceramic Research Institute,China Building Materials Academy,Beijing 100024,China Materials and Chemical Engineering College,Hainan University,Haikou 570228,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 959-964

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）