Influence of aging heat treatment on mechanical properties of biomedical Ti-Zr based ternary alloys containing niobium
Influence of aging heat treatment on mechanical properties of biomedical Ti-Zr based ternary alloys containing niobium
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DOI：
10.1023/a:1008927407556
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发表时间：
1998-11-01
影响因子：
3.7
通讯作者：
Bonfield, W
中科院分区：
文献类型：
--
作者：
Kobayashi, E;Doi, H;Bonfield, W
研究了含少量铌的钛锆基合金作为生物医用材料的可能性。锆属于IVa族，已知具有良好的耐腐蚀性和生物相容性，与钛相似。由于钛-锆系统显示出完全的固溶体，因此可以使用各种合金设计，并且必须能够进行大量的固溶硬化。铌，具有β相稳定效果，被选为三元元素，以控制所需的微观结构。目前还没有报道表明它对人体有危害。含2%或3%铌的合金在773 K时效后硬度最高。与此相反，在1073 K时效的试样中没有看到硬度的变化。通过常规的X射线衍射法和使用热台的原位X射线分析，确定了α基体中的β相沉淀。从以上结果可以得出结论，含2%-3%铌的合金在适当的热处理条件下是有希望的新型生物医用合金的候选者。(C)1998 Kluwer Academic Publishers.
Titanium-zirconium based alloys containing a small amount of niobium were investigated in order to evaluate their possible use as biomedical materials. Zirconium, which belongs to the IVa group, is known to have good corrosion resistance and biocompatibility similar to titanium. As the titanium-zirconium system shows a complete solid solution, a wide variation of alloy design is available and large quantities of solid-solution hardening must be possible. Niobium, having a beta-phase stabilizing effect, was chosen as a ternary element in order to control desirably the microstructure. There have been no reports which suggest its harm to a living body. The alloys containing 2% or 3% niobium showed the highest hardness value after aging heat treatment at 773 K. In contrast to this, no alteration of hardness was seen in specimens aged at 1073 K. Through conventional X-ray diffractometry and in situ X-ray analysis using a hot stage, beta-phase precipitation in the a matrix was identified. From the above results, it is concluded that alloys containing 2%-3% niobium are hopeful candidates for new kinds of biomedical alloys, when they are heat treated under suitable conditions. (C) 1998 Kluwer Academic Publishers.