Mechanosynthesis mechanism of TiC powders
Mechanosynthesis mechanism of TiC powders
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DOI：
10.1179/mst.1998.14.4.287
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发表时间：
1998-04
影响因子：
1.8
通讯作者：
N. Wu;S. Lin;Jin-Ming Wu;Z. Z. Li-Z.
中科院分区：
文献类型：
--
作者：
N. Wu;S. Lin;Jin-Ming Wu;Z. Z. Li-Z.
在对单质钛和石墨的粉末混合物进行球磨过程中，通过燃烧反应合成TiC。利用x射线光电子能谱和差热分析研究了控制反应动力学的因素。在燃烧反应前的潜伏期，碳原子沿着Ti的晶界扩散，导致反应物在纳米尺度上混合。形成过渡键态（Ti…C），降低燃烧反应的点火温度。此外，在机械合成过程中，燃烧发生所需的最低绝热温度为1800 K。
During ball milling of a powder mixture of elemental titanium and graphite, TiC is synthesised by a combustion reaction. The factors controlling the reaction kinetics have been investigated using X-ray photoelectron spectroscopy and differential thermal analysis. In the incubation period before a combustion reaction, the carbon atoms diffuse along the grain boundaries of Ti, resulting in the mixing of the reactants on a nanometre scale. A transitional bonded state (Ti … C) is formed, reducing the ignition temperature for a combustion reaction. In addition, a minimum adiabatic temperature of 1800 K is necessary for the occurrence of combustion during the mechanosynthesis process.