(1. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083；
2. 湖南大學(xué) 生物學(xué)院，長(zhǎng)沙 410082)
摘 要: 目前，在牙科臨床應(yīng)用的Ti-Zr合金依然存在耐磨性不足等力學(xué)性能問(wèn)題，制約了其在牙科領(lǐng)域的進(jìn)一步發(fā)展。本實(shí)驗(yàn)采用粉末冶金的方法，制備了氧含量較高的Ti-15Zr-0.72O(質(zhì)量分?jǐn)?shù)，%)和Ti-15Zr-0.86O合金，通過(guò)與傳統(tǒng)鑄錠冶金制備的Ti-15Zr合金對(duì)比，研究氧含量對(duì)材料力學(xué)性能的影響。Ti-15Zr-0.86O合金的顯微維氏硬度達(dá)到449.9HV，比Ti-15Zr-0.72O的高8%，相對(duì)Ti-15Zr的高出76%。在模擬唾液中進(jìn)行的摩擦磨損實(shí)驗(yàn)顯示，Ti-15Zr-0.86O相對(duì)于Ti-15Zr-0.72O磨損質(zhì)量減少，表面剝落現(xiàn)象更少，且兩者磨損量遠(yuǎn)小于Ti-15Zr。實(shí)驗(yàn)結(jié)果表明通過(guò)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。
關(guān)鍵字: Ti-Zr合金；粉末冶金；固溶氧；維氏硬度；摩擦磨損性能
（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
