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Ti-35Nb-7Zr-10CPP生物复合材料的微观组织演变与力学性能研究
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昆明理工大学 材料科学与工程学院,昆明理工大学 材料科学与工程学院,昆明理工大学 材料科学与工程学院,昆明理工大学 材料科学与工程学院

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国家自然科学基金资助项目(31160197);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)


Study on Microstrcture Evolution and Mechanical Properties of Ti-35Nb-7Zr-10CPP Biocomposites
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School of Materials Science and Engineering,Kunming University of Science and Technology,School of Materials Science and Engineering,Kunming University of Science and Technology,School of Materials Science and Engineering,Kunming University of Science and Technology,School of Materials Science and Engineering,Kunming University of Science and Technology

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    摘要:

    利用放电等离子烧结技术制备了Ti-35Nb-7Zr-10CPP生物复合材料,研究了不同烧结温度(950-1150 ℃)对复合材料致密度、微观组织演变与力学性能的影响及机理。结果表明,复合材料主要由β-Ti相基体、少量残留α-Ti相及CaTiO3、Ti2O、CaO、CaZrO3、TixPy等金属-陶瓷相组成;随着烧结温度升高,复合材料中残留α-Ti相逐渐减少,而金属-陶瓷相逐渐增多;复合材料的压缩弹性模量与抗压强度随烧结温度升高呈增大趋势,但是当烧结温度超过1050 ℃时,由于金属与陶瓷的剧烈反应导致金属-陶瓷相迅速增多,从而使得压缩弹性模量值快速增大。因此,当烧结温度在1000-1050 ℃范围时,复合材料获得了较好的综合力学性能,其压缩弹性模量为42-45 GPa、抗压强度为1240-1330 MPa;同时,在模拟人工体液中浸泡7天后,复合材料表面能够获得一层致密的类骨磷灰石层,显示了良好的生物活性。

    Abstract:

    Ti-35Nb-7Zr-10 Calcium pyrophosphate (CPP) composites were prepared by spark plasma sintering (SPS) technology varied from 950 ℃ to 1150 ℃. The effects of the sintering temperature on the relative density, microstructure evolution, and mechanical properties of the composites were investigated. The results showed that the composites were consisted of a β-Ti phase matrix, a little residual α-Ti phase and metal - ceramic phases (Ti2O, CaO, CaTiO3, CaZrO3 and TixPy). With the sintering temperature increasing, the residual α-Ti phase decreased, while the metal - ceramic phase gradually increased. The elastic modulus and compressive strength of composites appeared a tendency of increase with the sintering temperature rising. However, when the sintering temperature was over 1050 ℃, metal - ceramic phases rapidly increased due to the violent reaction between metal and ceramic, which led to the elastic modulus increasing drastically. Thus, when the sintering temperature were in the range of 1000 - 1050 ℃, The elastic modulus and compressive strength of composites were in the range of 42 - 45 GPa and 1240 - 1330 MPa, respectively, revealing better overall mechanical properties. At the same time, the surface of the composite after soaking in SBF for 7 days formed a dense bone-like apatite layer, which showed a good bioactivity.

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何正员,张玉勤,周荣,蒋业华. Ti-35Nb-7Zr-10CPP生物复合材料的微观组织演变与力学性能研究[J].稀有金属材料与工程,2016,45(4):1061~1066.[He Zhengyuan, Zhang Yuqin, Zhou Rong, Jiang Yehua. Study on Microstrcture Evolution and Mechanical Properties of Ti-35Nb-7Zr-10CPP Biocomposites[J]. Rare Metal Materials and Engineering,2016,45(4):1061~1066.]
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  • 收稿日期:2015-06-02
  • 最后修改日期:2015-08-19
  • 录用日期:2015-10-13
  • 在线发布日期: 2016-06-01
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