粉末冶金Ti-Zr牙科修复材料的结构与性能

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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

Received: 29 September 2018 Published: 12 July 2019

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TG146.4

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	WANG Baoqi
	ZHANG Taomei
	WANG Jianying
	YANG Hailin
	RUAN Jianming

Cite this article:

WANG Baoqi,ZHANG Taomei,WANG Jianying, et al. Microstructure and properties of powder metallurgy Ti-Zr alloys for dentalimplants[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(2): 106-111.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I2/106

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