Wearing and Corrosion Resistance of TAMZ Alloy Implanted by Carbon Ion in Hank’s Body Fluid

摘要:

人体模拟体液Hank’s溶液中对碳离子注入TAMZ合金的耐蚀耐磨行为进行研究。结果表明，碳离子注入TAMZ合金表面形成含碳量1.07%的均匀改性层，碳离子注入层厚度达9 μm。碳离子注入后，TAMZ表面形成无序层膜，经XRD分析主要由TiC和Ti组成。Hank’s溶液中电化学测试结果表明，注入碳离子的TAMZ合金腐蚀电位升高、电荷转移电阻增大，阳极极化电流密度降低，改善了电化学性能。其原因归结于碳离子注入后碳化物的无序层膜的形成阻滞了合金元素的溶解，提高了膜层的耐蚀性能。Hank’s溶液中注入碳离子的TAMZ合金的摩擦系数和比磨损率均明显小于基体TAMZ合金，硬度提高；而且经摩擦的碳离子注入TAMZ合金比基体TAMZ合金的阳极极化电流密度小、电荷转移电阻大，表明碳离子注入改性层在人体模拟液环境中具有优良的耐磨、耐蚀性能

Abstract:

The wear ability and the corrosion resistance of TAMZ alloy implanted by carbon ions were investigated in Hank’s body fluid. The results show that the uniformly modified layer formed by implanting carbon ion on TAMZ alloy surface is composed of TiC and Ti with carbon content of 1.07wt%. The thickness of the carbon ions implanted layer is 9 μm. Electrochemical test results indicate that the implanted alloy corrosion potentials and the charge transfer resistance are all increased, and the anodic polarization current density is decreased in Hank’s body fluid. This is because the disordered carbide film is formed, which blocks the dissolution of alloying elements. In Hank’s body fluid, the friction coefficient and the wear rate of the TAMZ alloy implanted by carbon ions are less than those of TAMZ matrix, but hardness is increased after implantation. In addition, the implanted alloy’s anodic polarization current density is decreased and the charge transfer resistance is increased after friction. It means that the modified layer formed by implanting carbon ions has the excellent wear resistance and the corrosion resistance in a simulated human body fluid