Mechanical properties and cyto-toxicity of new beta type titanium alloy with low melting points for dental applications
Mechanical properties and cyto-toxicity of new beta type titanium alloy with low melting points for dental applications
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DOI：
10.1016/j.msec.2005.01.024
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
M. Niinomi;T. Akahori;T. Takeuchi;S. Katsura;H. Fukui;H. Toda
中科院分区：
文献类型：
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作者：
M. Niinomi;T. Akahori;T. Takeuchi;S. Katsura;H. Fukui;H. Toda
β稳定的新合金如Ti-29 Nb-13 Zr-2Cr、Ti-29 Nb-15 Zr-1.5Fe、Ti-29 Nb-10 Zr-0.5Si、Ti-29 Nb-10 Zr-0.5Cr-0.5Fe和Ti-29 Nb-18 Zr-2Cr-0.5Si已被开发用于牙科应用。这些合金是基于用于生物医学应用的中间合金Ti-29 Nb-13 Ta-4.6Zr（TNTZ）设计的。本研究采用Cr、Fe、Si等β稳定化元素代替高熔点元素Ta，降低合金的熔化温度。研究了它们的熔点、力学性能、表面反应层和细胞毒性。与TNTZ合金相比，所设计合金的熔点降低了50 ~ 370 K，其中Ti-29 Nb-13 Zr-2Cr合金的熔点最低，约为2050 K。铸造到改性氧化镁基包埋材料中的每种设计的合金的表面的维氏硬度在400 Hv至500 Hv的范围内，这低于TNTZ的维氏硬度（约560 Hv）。铸造Ti-29 Nb-13 Zr-2Cr、Ti-29 Nb-15 Zr-1.5Fe和Ti-29 Nb-10 Zr-0.5Cr-0.5Fe的强度和塑性平衡与铸造TNTZ的强度和塑性平衡接近。每种铸造设计的合金的细胞活力都是优异的。
Beta stabilized new alloys such as Ti–29Nb–13Zr–2Cr, Ti–29Nb–15Zr–1.5Fe, Ti–29Nb–10Zr–0.5Si, Ti–29Nb–10Zr–0.5Cr–0.5Fe and Ti–29Nb–18Zr–2Cr–0.5Si have been developed for dental applications. These alloys were designed based on master alloy Ti–29Nb–13Ta–4.6Zr (TNTZ) for biomedical applications. In this research, high melting temperature element Ta was replaced with beta stabilizing elements such as Cr, Fe and Si to lower the melting temperature of the alloy. Their melting points, mechanical properties, surface reaction layers and cyto-toxicity were investigated in this study. Melting points of designed alloys fall by about 50 K to 370 K as compared with that of TNTZ, and Ti–29Nb–13Zr–2Cr has the lowest melting point of around 2050 K. Vickers hardness of the surface of each designed alloy cast into modified magnesia based investment material is in the range of 400 Hv to 500 Hv, which is lower than that of TNTZ (around 560 Hv). Balances of strength and ductility of cast Ti–29Nb–13Zr–2Cr, Ti–29Nb–15Zr–1.5Fe and Ti–29Nb–10Zr–0.5Cr–0.5Fe are nearly equal to that of cast TNTZ. Cell viability of each cast designed alloy is excellent.