原位生成TiC颗粒增强Ti基复合材料的显微组织

The Study of in Situ TiC Reinforced Ti Matrix Composites

采用粉末冶金方法,通过Ti与Cr3C2反应原位生成TiC颗粒增强钛基复合材料。利用X射线衍射(XRD)、透射电镜(TEM)等手段对其相组成和显微组织进行了研究。结果表明:通过Ti与Cr3C2反应能够原位生成TiC颗粒,生成的TiC颗粒呈多角状,粒度在几十纳米到50μm范围内;Cr3C2中的Cr固溶在Ti基体中,使基体由α+β两相合金转变成为亚稳态β型钛合金。

In this work, a titanium matrix composite reinforced by TiC was prepared through the synthesis reaction from Ti and Cr3C2 by PM technique. Phase composition and microstructure were investigated by means of X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The results show that the reaction between Ti and Cr3C2 results in the formation of TiC and Ti-Cr solid solution. The size of TiC was about 50 nm to 50 μm. The phase of titanium alloy transform from （α＋β） into β structure.