中文摘要：

用等离子喷涂方法分别制备纯Cr_2O_3以及添加金刚石微粉的Cr_2O_3/C复合涂层,并比较分析了复合涂层的微观结构、力学和摩擦学性能。采用光学显微镜和扫描电镜分析涂层微观结构;用阿基米德原理计算涂层致密度;用高速线性往复磨损试验测试了涂层的磨损性能。结果表明,添加粒度为10μm金刚石微粉后的Cr_2O_3喷涂层的密度、硬度和耐磨性均有提高,其中含10%金刚石微粉的涂层磨损性能最佳,摩擦系数最小为0.06,磨损率最低,仅为9×10-16m3/N·m;适量添加金刚石能够提高Cr_2O_3涂层的摩擦磨损性能;涂层磨损机制是轻微磨粒磨损机制并伴有物质转移。

英文摘要：

Themechanical behavior of the Cr_2O_3 coatings,deposited by plasma spraying on substrate of stainless steel,was improved by adding diamond micro-powder to Cr_2O_3 powder. The influence of the content and grain-size of diamond powder on the microstructures and tribological properties of the Cr_2O_3 coatings was investigated with scanning electron microscopy,energy dispersive spectroscopy and conventional mechanical tools. The results show that the addition of diamond powder significantly improved the microstructures,mechanical and tribological properties of the Cr_2O_3 coatings. For example,as the content of 10 μm diamond powder increased,the compactness,hardness and wear-resistance of the Cr_2O_3 coatings increased,but the friction coefficient and wear-rate decreased. Coated at a content of 10%10 μm diamond powder,the lowest friction coefficient and wear-rate were 0. 06 and 9 × 10- 16m3/ N·m,respectively.A slight abrasive wear and some material transfer were responsible for the wear mechanisms.