(1. 中南大学 粉末冶金国家重点实验室，长沙 410083；
2. 湖南大学 生物学院，长沙 410082)
摘 要: 目前，在牙科临床应用的Ti-Zr合金依然存在耐磨性不足等力学性能问题，制约了其在牙科领域的进一步发展。本实验采用粉末冶金的方法，制备了氧含量较高的Ti-15Zr-0.72O(质量分数，%)和Ti-15Zr-0.86O合金，通过与传统铸锭冶金制备的Ti-15Zr合金对比，研究氧含量对材料力学性能的影响。Ti-15Zr-0.86O合金的显微维氏硬度达到449.9HV，比Ti-15Zr-0.72O的高8%，相对Ti-15Zr的高出76%。在模拟唾液中进行的摩擦磨损实验显示，Ti-15Zr-0.86O相对于Ti-15Zr-0.72O磨损质量减少，表面剥落现象更少，且两者磨损量远小于Ti-15Zr。实验结果表明通过添加氧元素，Ti-15Zr系列合金的硬度和耐磨性能得到大幅度提升。
关键字: Ti-Zr合金；粉末冶金；固溶氧；维氏硬度；摩擦磨损性能
（1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China
2. College of Biology, Hunan University, Changsha 410082, China）
Abstract:Clinical Ti-Zr alloys still have the problem of insufficient wear resistance, which limits its further development in the dental field. Therefore, the wear resistance can be improved by introducing oxygen into the Ti-Zr alloy. In this work, Ti-15Zr-0.72O (mass fraction, %) and Ti-15Zr-0.86O alloys were prepared with the method of powder metallurgy. Ti-15Zr was prepared by arc-melting. The effect of oxygen content on the mechanical properties of Ti-15Zr alloys was studied. The Vickers hardness of Ti-15Zr-0.8O reaches 449.9 MPa, which is 8% higher than Ti-15Zr-0.7O, and 76%higher than Ti-15Zr. The tribological behavior of sintered composites was studied in artificial saliva solution. Ti-15Zr-0.86O hardness weight loss and surface peeling than Ti-15Zr-0.72O. Both of their weight losses are less than that of Ti-15Zr. The results show that the hardness and wear resistance of Ti-15Zr alloys are significantly improved by adding oxygen.
Key words: Ti-Zr alloy; powder metallurgy; oxygen solute; Vickers hardness; wear resistance
