Evaluation of mechanical and corrosion biocompatibility of TiTa alloys
Evaluation of mechanical and corrosion biocompatibility of TiTa alloys
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DOI：
10.1023/a:1011210101895
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发表时间：
2001-04-01
影响因子：
3.7
通讯作者：
Murr, LE
中科院分区：
文献类型：
--
作者：
Trillo, EA;Ortiz, C;Murr, LE
对收到并经过热处理的 Ti40Ta 和 Ti50Ta 合金进行了评估，以确定其腐蚀和机械性能，并与用于骨科（外科）植入物的常用材料 Ti6A14V 进行比较。在 Plasmalyte(TM) 中进行的阳极动电位测试表明，除了在 400 ℃ 下老化 3 小时的 Ti50Ta 样品之外，所有样品都给出了与 Ti6Al4V 相似的曲线。进行光学和 TEM 显微镜检查以确定原样和热处理后的微观结构。收到的材料在 α+β 和马氏体基体中显示出 α 沉淀。在400℃下老化的样品的α沉淀物的密度和长度增加。进行维氏硬度测量以获得拉伸强度的近似值。与 Ti6A14V 材料相比，时效 Ti40Ta 和 Ti50Ta 样品产生了最高的拉伸值，3 小时样品增加了 31% 和 56%，10 小时样品增加了 18% 和 58%。在所有研究的材料中，老化 10 小时的 Ti50Ta 样品表现出最佳的生物相容性，表现出优异的耐腐蚀性和最高的拉伸强度（1089 MPa，比 Ti6A14V 硬/强 58%）。 (C) 2001 年 Kluwer 学术出版社。
As-received and heat-treated Ti40Ta and Ti50Ta alloys were evaluated to determine their corrosion as well as mechanical performances and compared to Ti6A14V, a common material utilized for orthopedic (surgical) implants. Anodic potentiodynamic tests performed in Plasmalyte(TM) showed that all samples, except for the Ti50Ta specimen aged at 400 degreesC for 3 h gave a curve similar to that of Ti6A14V. Optical and TEM microscopy was performed to determine as-received and heat-treated microstructures. As-received materials showed an alpha precipitate in an alpha+beta and martensite matrix. Samples that were aged at 400 degreesC increased in the density and the length of the alpha precipitate. Vickers hardness measurements were performed to get an approximation of the tensile strengths. Aged Ti40Ta and Ti50Ta specimens produced the highest tensile values when compared to the Ti6A14V material, representing a 31% and 56% increase for the 3 h samples and an 18% and 58% increase for the 10 h samples. Of all the materials studied the Ti50Ta specimen aged for 10 h exhibited the best biocompatibility showing excellent corrosion resistance combined with the highest tensile strength (1089 MPa and 58% harder/stronger than Ti6A14V). (C) 2001 Kluwer Academic Publishers.