放电等离子烧结Ti-35Nb-7Zr-xHA复合材料的力学性能与腐蚀性能

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 27; no. 4; pp. 848 - 856
Main Author 何正员;张磊;单文瑞;张玉勤;周荣;蒋业华;谭军
Format Journal Article
LanguageEnglish
Published 2017
Subjects
钛复合材料;放电等离子烧结;显微组织;力学性能;腐蚀性能
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ISSN1003-6326

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Bibliography:To improve the bioactivity of Ti?Nb?Zr alloy,Ti?35Nb?7Zr?xHA(hydroxyapatite,x=5,10,15and20,mass fraction,%)composites were fabricated by spark plasma sintering.The effects of the HA content on microstructure,mechanical and corrosionproperties of the composites were investigated utilizing X-ray diffraction(XRD),scanning electron microscope(SEM),mechanicaltests and electrochemical tests.Results show that all sintered composites are mainly composed ofβ-Ti matrix,α-Ti andmetal?ceramic phases(CaO,CaTiO3,CaZrO3,TixPy,etc).Besides,some residual hydroxyapatites emerge in the composites(15%and20%HA).The compressive strengths of the composites are over1400MPa and the elastic moduli of composites((5%?15%)HA)present appropriate values(46?52GPa)close to that of human bones.The composite with15%HA exhibits low corrosion currentdensity and passive current density in Hank's solution by electrochemical test,indicating good corrosion properties.Therefore,Ti?35Nb?7Zr?15HA composite might be an alternative material for orthopedic implant applications.
43-1239/TG
titanium composite; spark plasma sintering; microstructure; mechanical properties; corrosion properties
ISSN:1003-6326