表面等离子Mo合金化提高Ti-5Zr-3Sn-5Mo-15Nb耐磨性的研究

Improving the Wear Resistance of Ti-5Zr-3Sn-5Mo-15Nb by Plasma Mo Surface Alloying

摘要:

采用等离子合金化技术在Ti-5Zr-3Sn-5Mo-15Nb (TLM)表面制备含钼改性层，对改性层组织、成分分布和显微硬度进行分析，并测量去离子水在渗钼试样表面的接触角，同时研究在模拟人工体液中改性层的摩擦磨损行为。结果显示：所制备的钼改性层均匀致密，厚度约为12 μm，主要由Mo相组成。与TLM基体相比，渗钼后试样表面硬度显著增加。由于改性后Mo合金层的形成和表面粗糙度增加，使接触角降低，进而提高了表面润湿性。钼合金化后的TLM具有较低的摩擦系数，耐磨能力较未处理的合金提高约50倍，表现出良好的摩擦磨损性能。

Abstract:

A Mo surface-modified layer onto Ti-5Zr-3Sn-5Mo-15Nb (TLM) substrate was prepared by plasma surface alloying technique. The microstructure, component distribution and micro-hardness of the Mo modified layer were analyzed. Contact angles with deionized water were measured, and wear behavior of the samples against corundum ball in simulated human body fluids was investigated. The results indicate an about 12 μm uniform Mo surface-modified layer was obtained, which was mainly composed of Mo phase. The surface hardness of Mo alloyed TLM increased significantly than that of untreated TLM, and the contact angle was lowered due to the generation of Mo layer and the increase of surface roughness, enhancing the surface wettability. More importantly, compared to as-received TLM alloy, the Mo modified alloy exhibited significant improvement of wear resistance, about 50 times, with lower friction coefficient.