Ti35Nb7Zr-xHA生物复合材料的微观组织与性能研究*

doi:10.11896/j.issn.1005-023X.2017.022.012

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Abstract To improve the bioactivity of Ti-Nb-Zr alloy, Ti35Nb7Zr-xHA biocomposites with different hydroxyapatite (HA) contents (x=0,5,10, 20 (mass fraction,%)) were prepared by spark plasma sintering (SPS) technique. The effects of HA contents on microstructure, mechanical properties and in vitro bioactivity of the composites were investigated. The results show that the composites are mainly consisted of β-Ti phase, α-Ti phase, HA and metal-ceramic phases (TixPy,CaTiO₃,Ti₂O,CaO). With the increase of the HA content, the β-Ti phase decrease, while the α-Ti phase and metal-ceramic phase increase obviously. Compared to Ti-35Nb-7Zr alloy (E:45 GPa,σ:1 736 MPa), the compressive strength and the elastic modulus of Ti35Nb7Zr-xHA composites (x=5, 10) are in range of 1 593—1 662 MPa and 48—49 GPa, respectively, which are close to those of Ti-35Nb-7Zr alloy, and presenting a good mechanical properties. However, the Ti35Nb7Zr-20HA composite has highest elastic modulus (E:55 GPa) and lowest compressive strength (σ:958 MPa) compared with other composites, presenting poor mechanical property. Furthermore, lots of bone-like apatite is deposited on the surface of Ti35Nb7Zr-10HA composite after soaking in SBF for 7 d via in vitro bioactivity experiments, the Ti35Nb7Zr-10HA presents an excellent bioactivity compared with the Ti-35Nb-7Zr alloy.

Key words： titanium matrix biocomposite hydroxyapatite microstructure mechanical properties in vitro bioactivity

Published: 08 May 2018

CLC number:

TB333

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	Articles by authors
	SHAN Wenrui
	ZHANG Yuqin
	HE Zhengyuan
	JIANG Yehua

Cite this article:

SHAN Wenrui,ZHANG Yuqin,HE Zhengyuan, et al. Research on Microstructure and Properties of Ti35Nb7Z_r-xHA Biocomposites[J]. Materials Reports, 2017, 31(22): 60-64.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.022.012 OR http://www.mater-rep.com/EN/Y2017/V31/I22/60

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