Ho Wen-Fu, Chen Wei-Kai, Wu Shih-Ching, Hsu Hsueh-Chuan
Department of Materials Science and Engineering, Da-Yeh University, Chang-Hwa, Taiwan, ROC.
J Mater Sci Mater Med. 2008 Oct;19(10):3179-86. doi: 10.1007/s10856-008-3454-x. Epub 2008 Apr 25.
Structure, mechanical properties and grindability of a series of binary Ti-Zr alloys with zirconium contents ranging from 10 to 40 wt% have been investigated. Commercially pure titanium (c.p. Ti) was used as a control. Experimental results indicated that the diffraction peaks of all the Ti-Zr alloys matched those for alpha Ti. No beta-phase peaks were found. The hardness of the Ti-Zr alloys increased as the Zr contents increased, and ranged from 266 HV (Ti-10Zr) to 350 HV (Ti-40Zr). As the concentration of zirconium in the alloys increased, the strength, elastic recovery angles and hardness increased. Moreover, the elastically recoverable angle of Ti-40Zr was higher than of c.p. Ti by as much as 550%. The grindability of each metal was found to be largely dependent on the grinding conditions. The Ti-40Zr alloy had a higher grinding rate and grinding ratio than c.p. Ti at low speed. The grinding rate of the Ti-40Zr alloy at 500 m/min was about 1.8 times larger than that of c.p. Ti, and the grinding ratio was about 1.6 times larger than that of c.p. Ti. Our research suggested that the Ti-40Zr alloy has better mechanical properties, excellent elastic recovery capability and improved grindability at low grinding speed. The Ti-40Zr alloy has a great potential for use as a dental machining alloy.
研究了一系列锆含量在10 wt%至40 wt%之间的二元Ti-Zr合金的结构、力学性能和可磨性。使用工业纯钛（c.p. Ti）作为对照。实验结果表明，所有Ti-Zr合金的衍射峰与α-Ti的衍射峰匹配。未发现β相峰。Ti-Zr合金的硬度随着Zr含量的增加而增加，范围从266 HV（Ti-10Zr）到350 HV（Ti-40Zr）。随着合金中锆浓度的增加，强度、弹性回复角和硬度均增加。此外，Ti-40Zr的弹性回复角比工业纯钛高出多达550%。发现每种金属的可磨性在很大程度上取决于磨削条件。在低速下，Ti-40Zr合金比工业纯钛具有更高的磨削速率和磨削比。Ti-40Zr合金在500 m/min时的磨削速率约为工业纯钛的1.8倍，磨削比约为工业纯钛的1.6倍。我们的研究表明，Ti-40Zr合金具有更好的力学性能、优异的弹性回复能力以及在低磨削速度下改善的可磨性。Ti-40Zr合金作为牙科加工合金具有很大的应用潜力。
