Investigation of the intermetallic β'(B2)-phase in the Co–Al–Si system

被引：0

作者：

N. V. Kazantseva

I. V. Ezhov

D. I. Davydov

N. I. Vinogradova

P. B. Terent’ev

机构：

[1] Russian Academy of Sciences,Mikheev Institute of Metal Physics, Ural Branch

[2] Yeltsin Ural Federal University,undefined

来源：

Physics of Metals and Metallography | 2017年 / 118卷

关键词：

intermetallic compound CoAl; alloying with Si; prismatic dislocations; magnetic properties;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An experimental investigation of the structure and physical properties of the intermetallic β' (В2) phase in the Co–Al–Si system has been performed. It has been shown that alloying with silicon reduces the degree of long-range order and the lattice parameter of the B2 phase. It has been revealed that small additives of silicon (up to 3 at %) favor the formation of pores and cracks and lead to a strong embrittlement of the alloy. In the structure of the Co–39.5 at % Al–3 at % Si alloy after high-temperature homogenization at 1260°С for 30 h and slow cooling, prismatic dislocation loops of a specific cubic shape formed by edge dislocations with a Burgers vector а<100>(100) have been revealed. It has been shown experimentally that the changes in the magnetic properties of the weakly magnetic CoAl-based alloys can serve as an indicator of the degree of the defect nature of the crystal lattice of this intermetallic compound.

引用

页码：249 / 255

页数：6

共 38 条

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