Fabrication, property characterization and toughening mechanism of HA-ZrO2(CaO)/316L fibre composite biomaterials |
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| Authors: | JianPeng Zou ZeQiang He ZhongCheng Zhou BaiYun Huang QiYuan Chen and JianMing Ruan |
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| Affiliation: | (1) State Key Laboratory for Powder Metallurgy, Central South University, Changsha, 410083, China;(2) Institute of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, China;(3) Institute of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China |
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| Abstract: | HA-ZrO2(CaO)/316L fibre composites were successfully fabricated with vacuum sintering method and their properties and toughening
mechanism were studied. The results showed that HA-ZrO2(CaO)/316L fibre biocomposite having 20 vol% fibres had optimal comprehensive properties with bending strength, Young’s modulus,
fracture toughness and relative density equal to 140.1 MPa, 117.8 GPa, 5.81 MPa·m1/2 and 87.1%, respectively. The research also addressed that different volume ratios of the composites led to different metallographic
microstructures, and that metallographic morphologies change regularly with volume ratios of the composites. 316L fibres were
distributed randomly and evenly in the composites and the integration circumstance of the two phases was very well since there
were no obvious flaws or pores in the composites. Two toughening mechanisms including ZrO2 phase transformation toughening mechanism and fibre pulling-out toughening mechanism existed in the compsites with the latter
being the main toughening mechanism.
Supported by the National Natural Science Foundation of China (Grant No. 50604017) and the Postdoctoral Science Foundation
of Central South University |
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| Keywords: | vacuum sintering fabrication property characterization toughening mechanism biomaterials |
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