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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 .6 41μm ,并且具有 10nm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 6 36 .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。
High-energy ball mills were used to synthesize nano-scale TiC grains with Ti and C powders at room temperature. The synthesized powders were analyzed microscopically. The experimental results show that the mechanical alloying (MA) method can be synthesized in a relatively short period of time TiC powder, the synthesis mechanism of mechanical shock-induced self-propagating reaction mechanism. After milling reaction can be obtained with an average particle size of 5. 6 41μm, and with about 10nm nanocrystalline TiC powder. DAT analysis showed that the synthesis of TiC by heating method must be above 636.5 ℃, and the synthesis can be carried out at room temperature by the ball milling process.