摘要
采用高能机械研磨制备纳米结构WCCo复合粉末,研磨后的纳米结构WCCo复合粉末采用X射线衍射(XRD),高分辨透射电镜(HRTEM),X射线能谱仪(EDS)分析其微观结构(包括晶粒尺寸,应变,Co的分布和晶格缺陷)。研究发现经过高能机械研磨,WC的晶粒尺寸能降低到10nm以下,纳米尺度的WC晶粒被Co薄层覆盖和分离,WC晶粒的形貌为近似球形,并且WC晶粒中产生了大量的晶格缺陷。
Nanostructured WCCo composite powders were prepared by highenergy mechanical milling. The microstructure of asmilled WCCo composite powders (including grain size, lattice strain, Co distribution and lattice defects) was investigated by Xray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and energy dispersive Xray spectroscopy (EDS). Nanostructured WC covered and separated by cobalt thin layers with average grain size less than 10 nm was obtained by high energy mechanical milling. The morphology of WC grains is almost spherical. Highenergy mechanical milling could also bring about a large number of lattice defects in WC grains.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
1999年第3期185-188,共4页
Chinese Journal of Rare Metals
基金
中法政府间先进研究计划资助项目