成分和烧结温度对ZrO2颗粒增强型钛基复合材料力学性能的影响

摘要

钛利用粉末冶金方法制备钛基复合材料.采用X射线衍射仪、金相显微镜、扫描电镜及力学性能测试仪研究材料成分和烧结温度对显微结构及性能的影响.结果表明:加入ZrO2颗粒能够提高粉末冶金钛基复合材料的力学性能.加入4％ ZrO2,在1100℃下烧结4h,得到的钛基复合材料的相对密度为93.9％,屈服强度能达到1380 MPa(比纯钛高570 MPa),并且具有良好的塑性(极限应变超过24％).%The titanium-based composites were synthesized by powder metallurgy method.The effects of composition and sintering temperature on the microstructure and properties of the titanium-based composites were investigated by X-ray diffraction,optical microscopy,scanning electron microscopy and mechanical properties tests.The results demonstrate that adding ZrO2 particles can improve the mechanical properties of powder metallurgy (P/M) titanium-based composites.The Ti composite with 4％ (mole fraction)ZrO2 sintered at 1100 ℃ for 4 h shows an appropriate mechanical property with a relative density of 93.9％,a compressive strength of 1380 MPa (570 MPa higher than pure Ti) and good plasticity (an ultimate strain above 24％).