Influence of minor Co on the formation of intermetallic phases in the Al91Fe7Si2 alloy

被引：14

作者：

Jiang, H. ^{[1
]}

Liu, Y. C. ^{[1
]}

Wei, C. ^{[1
]}

Zhang, Y. H. ^{[1
]}

Gao, Z. M. ^{[1
]}

机构：

[1] Tianjin Univ, Coll Mat Sci & Engn, Tianjin 300072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 466卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Intermetallics; Rapid-solidification; Quenching; Microstructure; Metallography;

D O I：

10.1016/j.jallcom.2007.11.019

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 performance of Al-Fe-Si alloy is predominantly controlled by type and morphology of the formed intermetallic compounds (IMCs). Here the influence of minor addition of Co on the microstructural formation of Al91Fe7Si2 alloy was explored in a wide cooling rate range of 1-100 K/s. According to the results of microstructure analysis, it is found that both theta-AlFe(Si) phase and alpha-AlFeSi phase exist in the Al91Fe7Si2 alloy, while the theta-AlFe(SiCo) phase dominates the microstructure of Al89Fe7Si2Co2 alloy solidified with all explored cooling rates. This observation indicates that the addition of Co improves stability of the theta-AlFe(Si) IMCs in the Al91Fe7Si2 alloy. Furthermore, the formation of the theta-AlFe(SiCo) phase in the explored Al89Fe7Si2Co2 alloy is discussed in a solution-strengthening mechanism. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：92 / 97

页数：6

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