High-resolution electron microscopy of amorphization of Cu4Ti3

被引:11
作者
Luzzi, D. E. [1 ]
Meshii, M.
机构
[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60201 USA
基金
美国国家科学基金会;
关键词
D O I
10.1557/JMR.1986.0617
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The electron irradiation-induced, crystalline-to-amorphous transition was studied in the intermetallic compound Cu4Ti3 by high-resolution electron microscopy. Using high-resolution maps from the crystalline region into the amorphized region, the amorphization process and the amorphous structure were examined. The extent of chemical order in crystalline regions just prior to amorphization was studied by simultaneously imaging superlattice and fundamental lattice fringe contrast. The chemical order continuously decreased in these regions but faint superlattice contrast was recognized as long as the crystalline feature remained on the image, supporting the theory that chemical disordering is the major driving force for amorphization. The amorphization process appears to be evolutionary, leading to a nanocrystalline type of amorphous structure. A model of the amorphization process is proposed based on the present results and those from previous studies.
引用
收藏
页码:617 / 628
页数:12
相关论文
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