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中文摘要：
对超音速等离子喷涂铁基涂层的接触疲劳失效机理进行了研究。使用球盘式接触疲劳试验机进行了涂层的接触疲劳实验．并通过对失效试样表面形貌的观察，总结出了涂层三种典型的失效形式，即点蚀、剥落和分层。分别研究了三种失效形式的相应的失效机理，结果表明：点蚀失效是由粗糙的表面引起的；剥落失效是由于表层与次表层的微观缺陷引起的；而分层失效则由涂层内部的剪切应力机制决定。
英文摘要：
The contact fatigue mechanism of supersonic plasma sprayed Fe-based alloy coating was investigated. The contact fatigue experiments of coating were conducted by a ball-and-disc contact fatigue tester. Three typical failure modes were obtained after the analysis of worn surface morphologies, i.e. abrasion, spalling and delamination. And the failure mechanisms were investigated, respectively. The results showed that the abrasion failure is associated with asperity contact, the spalling failure is associated with micro-defects near the surface, and the delamination failure is associated with the distribution of shear stress in the coating.
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