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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >The structure and mechanical properties of as-cast Zr-Ti alloys
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The structure and mechanical properties of as-cast Zr-Ti alloys

机译：Zr-Ti铸态合金的组织和力学性能

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This study has investigated the structure and mechanical properties of pure Zr and a series of binary Zr-Ti alloys in order to determine their potential application as dental implant materials. The titanium contents of these alloys range from 10 to 40wt. percent and were prepared by arc melting in inert gas. This study evaluated the phase and structure of these Zr-Ti alloys using an X-ray diffraction (XRD) for phase analysis, and an optical microscope for microstructure analysis of the etched alloys. Three-point bending tests were performed to evaluate the mechanical properties of all specimens. The experimental results indicated that the pure Zr and Zr-10Ti comprised entirely of an acicular hexagonal structure of alpha' phase. When the Ti content increased to 20 wt. percent, a significant amount of beta phase was retained. However, when the Ti content increased to 40 wt. percent, only the equi-axed, retained beta phase was observed in the cast alloy. Moreover, the hardness values and bending strengths of the Zr-Ti alloys decreased with an increasing Ti content. Among pure Zr and Zr-Ti alloys, the alpha'-phase Zr-10Ti alloy has the greatest hardness and bending strength. The pure Zr and Zr-Ti alloys exhibit a similar elastic modulus ranging from 68 GPa (Zr-30Ti) to 78 GPa (Zr-40Ti). Based on the results of elastic moduli, pure Zr and Zr-Ti alloys are found to be suitable for implant materials due to lower modulus. Like bending strength, the elastically recoverable angle of Zr-Ti alloys decreased as the concentration of Ti increased. In the current search for a better implant material, the Zr-10Ti alloy exhibited the highest bending strength/modulus ratios as large as 25.3, which are higher than that of pure Zr (14.9) by 70 percent, and commercially pure Ti (8.7) by 191 percent. Thus, Zr-Ti alloy's low modulus, ductile property, excellent elastic recovery capability and impressive strength confirm that it is a promising candidate for dental implant materials.
机译：这项研究已经研究了纯Zr和一系列二元Zr-Ti合金的结构和力学性能，以确定它们在牙种植体材料中的潜在应用。这些合金的钛含量为10至40wt％。通过在惰性气体中电弧熔化制备。这项研究使用X射线衍射（XRD）进行相分析，并使用光学显微镜对蚀刻后的合金进行微观结构分析，从而评估了这些Zr-Ti合金的相和结构。进行了三点弯曲测试，以评估所有样品的机械性能。实验结果表明，纯Zr和Zr-10Ti完全由α'相的针状六方结构组成。当Ti含量增加到20重量％时。 ％，保留了大量的β相。但是，当Ti含量增加到40wt。％时。 ％，在铸造合金中仅观察到等轴保留的β相。而且，Zr-Ti合金的硬度值和弯曲强度随着Ti含量的增加而降低。在纯Zr和Zr-Ti合金中，α'相Zr-10Ti合金具有最大的硬度和弯曲强度。纯Zr和Zr-Ti合金具有相似的弹性模量，范围从68 GPa（Zr-30Ti）到78 GPa（Zr-40Ti）。根据弹性模量的结果，发现纯Zr和Zr-Ti合金由于模量较低而适合植入材料。像弯曲强度一样，Zr-Ti合金的弹性回复角随Ti浓度的增加而减小。在当前寻找更好的植入材料方面，Zr-10Ti合金的弯曲强度/模量比最高，可达到25.3，比纯Zr（14.9）高70％，市售纯Ti（8.7）高。增长191％。因此，Zr-Ti合金的低模量，延展性，出色的弹性恢复能力和令人印象深刻的强度证明，它是牙科植入物材料的有希望的候选者。

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