On the Refinement Mechanism of Silicon in Al-Si-Cu-Zn Alloy with Addition of Bismuth

被引：26

作者：

Farahany, Saeed ^{[1
]}

Ourdjini, Ali ^{[1
]}

Abu Bakar, Tuty Asma ^{[1
]}

Idris, Mohd Hasbullah ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Johor Baharu 81310, Malaysia

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2014年 / 45A卷 / 03期

关键词：

SB;

D O I：

10.1007/s11661-013-2158-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Obtained results of micro and nano studies reveal that bismuth refines the silicon in which the flake silicon changed to lamellar structure with reduction in twin spacing from 160 to 75 nm. Bismuth segregates towards the inter-dendritic regions and decreases the Al-Si contact angle resulting in suppression of the silicon growth causing refinement of the eutectic structure. Increased recalescence temperature and time confirmed that the refinement effect is attributed to the growth stage.

引用

页码：1085 / 1088

页数：4

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