Microstructure and corrosion behavior of binary titanium alloys with beta-stabilizing elements.
Microstructure and corrosion behavior of binary titanium alloys with beta-stabilizing elements.
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DOI：
10.4012/dmj.20.34
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发表时间：
2001-03
影响因子：
2.5
通讯作者：
Y. Takada;Hiroshi Nakajima;O. Okuno;Toru Okabe
中科院分区：
文献类型：
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作者：
Y. Takada;Hiroshi Nakajima;O. Okuno;Toru Okabe
通过金相观察和X射线衍射仪对含钴、铬、铜、铁、锰、钯(高达30%)和银(高达45%)的二元钛合金进行了研究，以确定是否能保留有利于牙科使用的β相。并对腐蚀行为进行了电化学研究和热力学讨论。一些含Co、Cr、Fe、Mn和Pd的铸态合金保留了β相，而含Ag和Cu的铸态合金则没有β相。在某些合金中，根据相图中的信息形成的金属间化合物。TiAg合金的耐蚀性下降是因为Ti2Ag和/或TiAg金属间化合物优先溶解在0.9%的氯化钠溶液中。另一方面，剩余的钛合金很容易变得被动，表现出与纯钛相似的良好耐腐蚀性，因为从热力学上讲，它们的基质似乎形成了钛的氧化物，就像纯钛一样。
Binary titanium alloys with the beta-stabilizing elements of Co, Cr, Cu, Fe, Mn and Pd (up to 30%) and Ag (up to 45%) were examined through metallographic observation and X-ray diffractometry to determine whether beta phases that are advantageous for dental use could be retained. Corrosion behavior was also investigated electrochemically and discussed thermodynamically. Some cast alloys with Co, Cr, Fe, Mn, and Pd retained the beta phase, whereas those with Ag and Cu had no beta phase. In some alloys, an intermetallic compound formed, based on information from the phase diagram. The corrosion resistance deteriorated in the TiAg alloys because Ti2Ag and/or TiAg intermetallic compounds preferentially dissolved in 0.9% NaCl solution. On the other hand, the remaining titanium alloys became easily passive and revealed good corrosion resistance similar to pure titanium since their matrices seemed to thermodynamically form titanium oxides as did pure titanium.