粉末冶金Ti-Zr牙科修复材料的结构与性能

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摘要采用真空烧结法制备粉末冶金Ti-xZr合金(x为质量分数,%。x=15,25,35,45),借助X射线衍射仪、光学显微镜、维氏硬度计、万能试验机、滚动摩擦磨损试验机、电化学工作站等仪器和实验设备,对Ti-Zr合金的物相组成、微观组织、力学性能、摩擦磨损性能以及抗腐蚀性能进行分析和测试,并在Ti-Zr合金表面接种培养肉骨瘤成骨细胞(MG-63),借助扫描电镜观察细胞的生长形态,对Ti-Zr合金的生物相容性进行分析与研究。结果表明,Ti-Zr合金由α相和α′相组成,弹性模量较纯Ti明显降低,在53.5~59.3βGPa之间,与人体骨组织较匹配,MG-63细胞在Ti-Zr合金表面呈现良好的生长形态。Ti-Zr合金的力学性能、摩擦磨损性能与抗腐蚀性能较纯钛都有较大的提升,且Zr含量越大,性能越好。其中Ti-45Zr合金具有最高的硬度(HV为525)β、最高抗压强度(1 599.9βMPa)、最高腐蚀电位E_corr(-0.255βV)及最低的体积磨损量(0.078 3βmm²)和摩擦因数(0.3~0.4),是最理想的牙科修复材料。

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	王葆奇
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	汪建英
	杨海林
	阮建明

关键词 ： Ti-Zr合金, 牙科修复材料, 摩擦性能, 抗腐蚀性能, 生物相容性

Abstract：Powder metallurgy Ti-xZr alloy (x=15, 25, 35, 45, mass fraction, %) were prepared by vacuum sintering technology. The microstructure and phase composition of Ti-Zr alloys were investigated by OM and XRD, the mechanical properties were measured by Vickers hardness tester and universal material testing machine, the friction performance and corrosion resistance were investigated by Rolling friction and wear tester and electrochemical workstation, and the in-vitro cytotoxicity tests (MG-63) were carried out for biocompatibility evaluation. The results indicated that α and α′ phase exist in Ti-xZr alloys, all Ti-Zr alloys show a lower elastic modulus ranging from 53.5 GPa to 59.3 GPa compared with CP-Ti. The alloys presented no cytotoxic effects and the surface of the alloys exhibited great growth conditions for MG-63 cells. Increasing Zr content could lead to increase in mechanical properties, friction performance and corrosion resistance. The Ti-45Zr alloy exhibited the maximum vickers hardness (HV 525), compressive strength (1 599.9 MPa), corrosion potential E_corr (-0.255 V) and the minimum volume of friction wear (0.078 3 mm²) and friction coefficient (0.3-0.4) which is of great potential for dental applications.

Key words： Ti-Zr alloys dental applications friction performance corrosion resistance biocompatibility

收稿日期: 2018-09-29 出版日期: 2019-07-12

ZTFLH:

TG146.4

作者简介: 阮建明,教授,博士。电话：0731-88876644;E-mail: jianming@csu.edu.cn

引用本文:

王葆奇, 张桃梅, 汪建英, 杨海林, 阮建明. 粉末冶金Ti-Zr牙科修复材料的结构与性能[J]. 粉末冶金材料科学与工程, 2019, 24(2): 106-111.
WANG Baoqi, ZHANG Taomei, WANG Jianying, YANG Hailin, RUAN Jianming. Microstructure and properties of powder metallurgy Ti-Zr alloys for dentalimplants. Materials Science and Engineering of Powder Metallurgy, 2019, 24(2): 106-111.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2019/V24/I2/106

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