Microstructure, mechanical properties, and corrosion resistance of Ti-20Zr alloy in undoped and NaF doped artificial saliva
Microstructure, mechanical properties, and corrosion resistance of Ti-20Zr alloy in undoped and NaF doped artificial saliva
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DOI：
10.1007/s12540-013-6031-x
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发表时间：
2014-01-01
影响因子：
3.5
通讯作者：
Popa, Mihai V.
中科院分区：
文献类型：
--
作者：
Moreno, Jose M. Calderon;Popa, Monica;Popa, Mihai V.
本文研究了一种新型、先进的 Ti-20Zr 合金的腐蚀行为，该合金具有 α+β 微观结构（通过光学显微镜、XRD 和 SEM 测定）和非常好的机械性能（从应力-应变曲线获得）。通过XPS分析确定合金原生钝化膜的成分，并通过电化学方法模拟牙种植体的严酷功能条件，用不同pH值的0.05M NaF人工Carter-Brugirard唾液分析未掺杂和掺杂状态下的长期耐腐蚀性。该合金在良好的机械强度和塑性以及杨氏模量之间具有有利的平衡，并且由于其含有Ti2O3、TiO2和ZrO2保护氧化物的更耐用的钝化层，因此比CP Ti表现出更有利的电化学参数和耐腐蚀性。在唾液中浸泡 1000 小时后，由于沉积的表面层含有保护性磷酸盐（SEM 和 XPS 显示），合金的保护性能得到增强。
The corrosion behavior of a new, advanced Ti-20Zr alloy with alpha+beta microstructure (determined by optical microscopy, XRD, and SEM) and very good mechanical properties (obtained from the stress-strain curve) is studied in this paper. The composition of the alloy native passive film was determined from a XPS analysis and the long-term corrosion resistance in undoped and doped states with 0.05M NaF artificial Carter-Brugirard saliva of different pH values, simulating the severe functional conditions of a dental implant, was analyzed by electrochemical methods. This alloy possesses an advantageous balance between good mechanical resistance and plasticity and Young's modulus and exhibits more favorable electrochemical parameters and corrosion resistance than CP Ti due to its more resistant passive layer containing Ti2O3, TiO2, and ZrO2 protective oxides. After 1000 h of immersion in saliva, the protective properties of the alloy were enhanced due to the deposited surface layer that incorporated protective phosphates (shown by SEM and XPS).