An in-situ TEM study of the L12 to DO19 phase transformation in the intermetallic compound Fe3Ge

被引：17

作者：

Chen, QZ ^{[1
]}

Ngan, AHW ^{[1
]}

Duggan, BJ ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong, Hong Kong

来源：

INTERMETALLICS | 1998年 / 6卷 / 02期

关键词：

intermetallics; miscellaneous; phase transformations; defects; dislocation geometry and arrangement;

D O I：

10.1016/S0966-9795(97)00052-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The nucleation stage of the L1(2)-->DO19 transformation in Fe3Ge has been studied by in-situ heating experiments in the TEM. Stacking faults, which were identified as embryos of the product DO19 phase, were observed to generate from sources such as twin boundaries and superdislocations by the formation of stair-rod dislocations. Two types of stair-rod dislocations were identified and these had overall Burgers vector content of a perfect screw dislocation and zero, respectively. Thickening was via a stacking fault overlapping process. (C) 1997 Elsevier Science Limited.

引用

页码：105 / 114

页数：10

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