不同载荷下TC11合金等离子表面渗Mo层的摩擦磨损性能

稀有金属, 2015, 44(3): 557-562.

不同载荷下TC11合金等离子表面渗Mo层的摩擦磨损性能

于修水 ^1, , 梁文萍 ^2, , 缪强 ^3, , 徐一 ^4, , 任蓓蕾 ^5, , 郭凯 ^6,

1.南京航空航天大学,江苏南京,210016

2.南京航空航天大学,江苏南京,210016

3.南京航空航天大学,江苏南京,210016

4.南京航空航天大学,江苏南京,210016

5.南京航空航天大学,江苏南京,210016

6.南京航空航天大学,江苏南京,210016

基金项目: the Fundamental Research Funds for the Central Universities and the Aeronautical Science Foundation of China (2012ZF52071) National Natural Science Foundation of China (51174119)

关键词：摩擦磨损性能 , 渗Mo层 , 等离子表面冶金 , 载荷

Tribological Behavior of Plasma Mo-Alloyed Layer on TC11 Alloy under Different Loads

Keywords： tribological behavior , Mo-alloyed layer , double-glow plasma surface alloying , load

采用双辉等离子冶金技术制备渗Mo层,并研究其不同载荷下的摩擦行为和磨损机制.采用SEM、EDS和XRD表征渗Mo层的微观形貌、成分分布以及相结构.结果表明:渗Mo层厚度为20 μm,致密均匀,其相主要为Mo、Al3Ti和Al8(Ti3-xMox).为了研究渗Mo层的摩擦行为,分别在载荷1.3,5.3和9.3 N对其进行滑动磨损试验.随着载荷的增加,渗Mo层的平均摩擦系数和磨损率都呈上升趋势.根据载荷1.3 N条件下的三维形貌、SEM照片和能谱分析,得出其磨损机制为轻微磨粒磨损和氧化磨损;在载荷5.3 N条件下,氧化磨损和磨粒磨损为主要磨损机制;在载荷9.3 N条件下,主要磨损机制为氧化磨损、磨粒磨损和粘着磨损.

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