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1240-1330MPa;同时,在模拟人工体液中浸泡7 d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。
Ti-35Nb-7Zr-10 Calcium pyrophosphate（CPP） composites were prepared by spark plasma sintering（SPS） technology from 950 to 1150 °C. The effects of the sintering temperature on the relative density, microstructure evolution and mechanical properties of the composites were investigated. The results show that the composites consist of 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 decreases, while the metal-ceramic phase gradually increases. The elastic modulus and compressive strength of the composites increase with the sintering temperature rising. However, when the sintering temperature is over 1050 °C, metal-ceramic phases rapidly increases due to the violent reaction between metal and ceramic, which leads to the elastic modulus increasing drastically. Thus, when the sintering temperature are between 1000-1050 °C, the elastic modulus and compressive strength of composites are 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 d forms a dense bone-like apatite layer, which shows a good bioactivity.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第4期1061-1066,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(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)
