(昆明理工大学 材料系， 昆明 650093)
摘 要: 应用高能球磨机，用Ti和C粉末在室温下合成了纳米级TiC晶粒，并对合成后的粉末进行了微观组织分析。实验结果表明：用机械合金化 (MA)法可以在比较短的时间内合成TiC粉末，其合成机理为机械碰撞诱发的自蔓延反应机理。经过球磨反应可以得到平均颗粒大小为5.641 μm，并且具有10 nm左右的纳米晶粒TiC粉末。DAT分析表明，利用加热方法合成TiC必须在636.5 ℃以上才能进行，而通过球磨工艺可以使该合成过程在室温下进行。
关键字: 陶瓷材料； 纳米晶体； 机械合金化
high-energy ball milling
（Department of Materials， Kunming University of Science and Technology，
Kunming 650093, P.R.China）
Abstract:The fabrication of nanocrystalline TiC by a high-energy ball milling at room temperature was studied. The results show that TiC powder is fabricated within short time. The formation mechanism is self-propagating reactive synthesis induced by mechanical alloying. The particle size of TiC is 5.64 μm， and crystalline grain of TiC is 10 nm. The process of nanocrystalline TiC fabricated is occurred at room temperature.
Key words: ceramic; nanocrystalline; mechanical alloying
