摘要
用正电子湮没方法研究了TiC粉末的微观结构缺陷。结果表明，TiC在球磨过程中，发生了非晶晶化反应，形成了微晶，同时缺陷向内表面聚集，并且球磨后平均粒径明显变小，使粉末的外表面增加，从而压制时更容易成型。
Positron annihilation spectroscopy were employed to investigate the microstructural defects in the TiC powder. During the ball- milling, crystallization was happend and nanocrystallines were formed in TiC. At the same time, the defects gathered at the interface. The average particle size was reduced after the ball-milling,it make the surface increase so that the pressed formation became easier.
出处
《硬质合金》
CAS
1998年第2期83-85,共3页
Cemented Carbides
基金
国家自然科学基金!59571027
湖北省自然科学基金!96J029
模具技术国家重点实验室开放基金
关键词
正电子湮没
微晶
碳化钛
粉末冶金
Positron annihilation spectroscopy, Nanocrystalline
