PHASE-TRANSITION INDUCED BY BALL MILLING IN GERMANIUM

被引:70
作者
GAFFET, E
机构
[1] Centre d'Etudes de Chimie Métallurgique, CNRS, 15 Rue G. Urbain
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 136卷
关键词
D O I
10.1016/0921-5093(91)90451-R
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The paper reports on the crystal-to-amorphous phase transition induced by ball milling in a pure element: a germanium powder. Scanning electron micrographs show some spherical particles with smooth shapes. The container contamination, which was determined by chemical energy dispersive X-ray/scanning electron microscopy microanalyses, was found to be less than or equal to 0.5 at.% of iron (no significant chromium contamination could be detected). The analyses of the X-ray patterns reveal the coexistence of germanium microcrystallites and an amorphous phase. Some particles of about 100-200 nm in diameter exhibit a pure amorphous structure (bright field images and selected area diffraction patterns). The influence of the ball milling conditions on the dynamic end-product between the crystalline and the amorphous phases has been studied.
引用
收藏
页码:161 / 169
页数:9
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