雍岐龍
(昆明理工大學(xué) 材料系， 昆明 650093)
摘 要: 應(yīng)用高能球磨機(jī)，用Ti和C粉末在室溫下合成了納米級TiC晶粒，并對合成后的粉末進(jìn)行了微觀組織分析。實(shí)驗(yàn)結(jié)果表明：用機(jī)械合金化 (MA)法可以在比較短的時間內(nèi)合成TiC粉末，其合成機(jī)理為機(jī)械碰撞誘發(fā)的自蔓延反應(yīng)機(jī)理。經(jīng)過球磨反應(yīng)可以得到平均顆粒大小為5.641 μm，并且具有10 nm左右的納米晶粒TiC粉末。DAT分析表明，利用加熱方法合成TiC必須在636.5 ℃以上才能進(jìn)行，而通過球磨工藝可以使該合成過程在室溫下進(jìn)行。
關(guān)鍵字: 陶瓷材料； 納米晶體； 機(jī)械合金化
high-energy ball milling
ZHANG Xiu-qing, CHEN Tie-li, SHU Yun-sheng, YONG Qi-long
（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
