论文部分内容阅读
采用放电等离子烧结技术结合非晶晶化法制备了不同体积分数的TiC/TiB2颗粒增强的超细晶钛基复合材料.运用X射线衍射分析、扫描电子显微镜和万能材料试验机等实验手段,对合成的超细晶钛基复合材料进行测试分析.结果表明:随着外加TiC/TiB2颗粒的增加,钛基复合材料试样的致密度逐渐降低.TiC颗粒与基体不发生反应,而TiB2颗粒的加入改变了TiB2颗粒与基体界面的组织形貌,但对远离界面处的基体组织形貌没有影响,其组织均由-Ti(Nb)相和(Cu,Ni)-Ti2相组成,且-Ti(Nb)相连续分布.同时,TiC颗粒的增强效果优于TiB2颗粒,35vol.%(体积分数)TiC颗粒增强的复合材料试样的断裂强度最高,达2209MPa.
TiC / TiB2 particles reinforced ultrafine-grained titanium matrix composites with different volume fraction were prepared by spark plasma sintering combined with amorphous crystallization method.Using X-ray diffraction analysis, scanning electron microscopy and universal material testing machine, The results show that with the addition of TiC / TiB2 particles, the density of the Ti-based composite material decreases gradually, and the TiC particles do not react with the matrix, while the TiB2 particles The microstructures of the TiB2 particles and the matrix were changed, but the morphologies of the matrix were not affected. The microstructures were composed of -Ti (Nb) phase and (Cu, Ni) -Ti2 phase, (Nb) phase, while TiC particles have better reinforcing effect than TiB2 particles, and the breaking strength of the composites reinforced with 35vol.% TiC particles is the highest (2209MPa).