%0 Journal Article %T 烧结温度对焦磷酸钙/Ti-35Nb-7Zr复合材料微观组织及力学性能的影响<br>Effects of sintering temperature on microstructure and mechanical properties of calcium pyrophosphate/Ti-35Nb-7Zr composite %A 何正员 %A 单文瑞 %A 张玉勤 %A 蒋业华 %A 周荣 %J 复合材料学报 %D 2017 %R 10.13801/j.cnki.fhclxb.20160715.003 %X 为改善β型Ti-Nb-Zr合金的生物活性，添加20 wt%的焦磷酸钙（CPP）生物陶瓷，利用放电等离子烧结技术制备20CPP/Ti-35Nb-7Zr生物复合材料。借助XRD、SEM及力学测试方法等研究不同烧结温度（1 000~1 200℃）下复合材料的微观组织及力学性能，揭示其组织演变对力学性能的影响机制。结果表明：20CPP/Ti-35Nb-7Zr复合材料主要由β-Ti相基体、少量残留α-Ti相及金属-陶瓷相（CaTiO3、Ti2O、CaO、CaZrO3和TixPy）组成；随着烧结温度升高，复合材料中β-Ti相和金属-陶瓷相逐渐增多；金属与陶瓷之间的剧烈反应导致金属-陶瓷相的形态结构发生变化，复合材料中金属-陶瓷相从颗粒状析出物演变成连续网状组织，起到割裂基体的作用。20CPP/Ti-35Nb-7Zr复合材料的压缩弹性模量和抗压强度随着烧结温度的升高而增大，其中压缩弹性模量从64.0 GPa增加至71.4 GPa，金属-陶瓷相形态结构变化起主导作用。因此，控制20CPP/Ti-Nb-Zr复合材料中金属-陶瓷相的形态结构将有利于改善其力学性能。 To improve the bioactivity of β -type Ti-Nb-Zr alloy, 20 wt% CPP (calcium pyrophosphate) was added as bio-ceramic, and then the 20CPP/Ti-35Nb-7Zr composites were fabricated by spark plasma sintering (SPS) technology. The study was focus on microstructure and mechanical properties of the composites sintered at different temperatures (1 000-1 200℃). The influence mechanism of microstructure evolution on the mechanical properties was revealed. Results show that the composites are consisted of β -Ti phase matrix, a little residual α -Ti phase and metal-ceramic phases (CaO, Ti2O, CaTiO3, CaZrO3 and TixPy). With increasing sintering temperature, the β -Ti phase and metal-ceramic phase increase gradually. The changes of metal-ceramic phases from particle-like precipitate to a continuous network structure are caused by the fierce reaction between metal and ceramic, which separates the matrix. Compressive elastic moduli and compressive strength of 20CPP/Ti-35Nb-7Zr composites present substantial increases (64.0 to 71.4 GPa) with increase of sintering temperature due to the morphological changes of metal-ceramic phases. Therefore, it will be beneficial to improving mechanical properties by controlling the morphological structure of metal-ceramic phases in 20CPP/Ti-Nb-Zr composite. 国家自然科学基金（31660262）；云南省教育厅科学研究基金（2016ZZX049）；云南省中青年学术和技术带头人后备人才培养资助项目（2010CI011） %K 金属-陶瓷复合材料 %K 放电等离子烧结 %K 烧结温度 %K 微观组织 %K 力学性能< %K br> %K metal-ceramic composites %K spark plasma sintering %K sintering temperature %K microstructure %K mechanical properties %U http://fhclxb.buaa.edu.cn/CN/abstract/abstract13640.shtml