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)

• 作 者: 于修水 梁文萍 缪强 徐一 任蓓蕾 郭凯
• 机 构: 南京航空航天大学,
• 出 处: 稀有金属材料与工程
• 发表日期: 2015年03期
• 关键词: Mo TC11 磨损机制 氧化磨损 等离子冶金 磨粒磨损 摩擦行为 三维形貌 磨损率 滑动磨损

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 dual-hull plasma metallurgical technology was used to prepare the Mo-infiltrating layer and to study the frictional behavior and wear mechanism under different loads. The microstructure, composition distribution and phase structure of Mo-infiltrating layer were characterized by SEM, EDS and XRD. The results show that the Mo-infiltrated layer is 20μm in thickness and dense, with the major phases being Mo, Al3Ti and Al8 (Ti3-x Mox). In order to study the frictional behavior of the infiltrated Mo layer, a sliding wear test was carried out at loads of 1.3, 5.3 and 9.3 N, respectively. With the increase of load, the average friction coefficient and wear rate of Mo-infiltration layer all showed an upward trend. According to the three-dimensional topography, SEM image and energy spectrum analysis under the condition of 1.3 N load, the wear mechanism was found to be slight abrasive wear and oxidation wear. Under the loading of 5.3 N, the wear and abrasive wear were the main wear mechanisms. Under the load of 9.3 N, the main wear mechanisms are oxidative wear, abrasive wear and adhesive wear.