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.pdfVIP

Trans. Nonferrous Met. Soc. China 27(2017) 848−856 Mechanical and corrosion properties of Ti−35Nb−7Zr−xHA composites fabricated by spark plasma sintering 1 1 1 1,2 1 1 1,3,4 Zheng-yuan HE , Lei ZHANG , Wen-rui SHAN , Yu-qin ZHANG , Rong ZHOU , Ye-hua JIANG , Jun TAN 1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Engineering Technology Research Center of Titanium Products and Application of Yunnan Province, Kunming 650093, China; 3. Institute for Complex Materials, IFW Dresden, Dresden D-01171, Germany; 4. Institute of Materials Science, TU Dresden, Dresden D-01062, Germany Received 31 January 2016; accepted 7 July 2016 Abstract: To improve the bioactivity of Ti−Nb−Zr alloy, Ti−35Nb−7Zr−xHA (hydroxyapatite, x=5, 10, 15 and 20, mass fraction, %) composites were fabricated by spark plasma sintering. The effects of the HA content on microstructure, mechanical and corrosion properties of the composites were investigated utilizing X-ray diffraction (XRD), scanning electron microscope (SEM), mechanical tests and electrochemical tests. Results show that all sintered composites are mainly composed of β-Ti matrix, α-Ti and metal−ceramic phases (CaO, CaTiO , CaZrO , Ti P , etc). Besides, some residual hydroxyapatites emerge in the composites (15% 3 3 x y and 20% HA). The compressive strengths of the