Structure of GP zones in Al-Si matrix composites solidified under high pressure

被引：12

作者：

Ma, P. ^{[1
,2
]}

Zou, C. M. ^{[1
]}

Wang, H. W. ^{[1
]}

Scudino, S. ^{[2
]}

Song, K. K. ^{[2
]}

Khoshkhoo, M. Samadi ^{[2
]}

Wei, Z. J. ^{[1
]}

Kuehn, U. ^{[2
]}

Eckert, J. ^{[2
,3
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] IFW Dresden, Inst Complex Mat, D-01171 Dresden, Germany

[3] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

来源：

MATERIALS LETTERS | 2013年 / 109卷

基金：

中国国家自然科学基金;

关键词：

Metallic composite; Solidification; Microstructure; HRTEM; GP zones; MG ALLOY; MICROSTRUCTURE EVOLUTION; PRECIPITATION; SILICON; SYSTEM;

D O I：

10.1016/j.matlet.2013.06.075

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure of the Guinier-Preston (GP) zones precipitated in the Al-Si matrix composites after natural aging is investigated. The results show that, after natural aging, spherical GP zones with a diamond crystal structure form in the supersaturated alpha-Al matrix produced by high pressure solidification. The lattice parameter of the GP zones is 1.62 nm and their structure consists of Si-3 atomic clusters. The GP zones disappear and Si crystals are formed in the a-Al matrix after heating to 673 K. The precipitation sequences in the supersaturated alpha-Al matrix can be summarized as: alpha-Al (SSSS)-> GP zones -> equilibrium Si phase. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：1 / 4

页数：4

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