纳米TiC粉末的制备研究

Research on Preparation of Nanocrystalline TiC Powers

分别以Ti和TiO_2粉为钛源,石墨为碳源,结合机械合金化及高温烧结制备出TiC微粉。利用XRD、SEM对TiC的成分和形貌进行了观察分析。通过对比发现,以TiO_2作为钛源可得到纯度较高且粒度为纳米级的TiC粉末。球磨过程中原料粉末不断细化,有助于相互扩散并加速烧结过程中TiC的生成。

Taking Ti and TiO2 as the titanium source respectively, and graphite as the carbon source, the nano powders of TiC are prepared by mechanical alloying and high-temperature sintering. XRD and SEM are used to analyze and observe the powders. It is found that the nano-sized TiC powdes in higher purity can be easily obtained when TiO2 is taken as the titanium source. During the ball milling process, the particle size of raw powdes is decreased continuously,which is helpful for inter-diffusion and accelerating the formation of TiC during the following sinter process.