不同载荷下TC11合金等离子表面渗Mo层的摩擦磨损性能(英文)  

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

作　　者：于修水 梁文萍[1] 缪强[1] 徐一[1] 任蓓蕾[1] 郭凯[1] 

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《稀有金属材料与工程》2015年第3期557-562,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51174119);the Fundamental Research Funds for the Central Universities;the Aeronautical Science Foundation of China(2012ZF52071)

摘　　要：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20μm,致密均匀,其相主要为Mo、Al3Ti和Al8(Ti3-x Mox)。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。The tribological behavior and wear mechanism of a Mo-alloyed layer prepared by a double-glow plasma surface alloying technique were investigated under different loads. The microstructure, the composition distribution and the phase structure of the Mo-alloyed layer were characterized by SEM, EDS and XRD, respectively. The results show that the uniform and compact Mo-alloyed layer with 20 μm thickness is composed of phases Mo, Al3 Ti and Al8（Ti3-xM ox）. The sliding wear experiments were performed under different loads（1.3, 5.3 and 9.3 N） in order to examine the tribological properties of the Mo-alloyed layer. The average friction coefficients and the wear rates of Mo-alloyed layer both show an upward tendency with the increased of loads. Mild abrasion wear and oxidative wear could be detected under 1.3 N load based on the analysis results of 3D surface morphologies, SEM and EDS. The wear mechanism under 5.3 N load is dominated by oxidative wear and abrasion wear. Oxidative wear, abrasion wear and adhesive wear are the main wear mechanism under 9.3 N.

关 键 词：摩擦磨损性能 渗Mo层 等离子表面冶金 载荷 

分 类 号：TG174.4[金属学及工艺—金属表面处理]