Effect of SiC particles on the laser sintering of Al-7Si-0.3Mg alloy

被引：66
|
作者：
Simchi, A. [1 ]
Godlinski, D. [2 ]
机构：
[1] Sharif Univ Technol, Dept Mat Sci & Engn, Inst Nanosci & Nanotechnol INST, Tehran 14588, Iran
[2] Fraunhofer Inst Mfg Technol & Appl Mat Res IFAM, D-28359 Bremen, Germany
来源：
SCRIPTA MATERIALIA | 2008年 / 59卷 / 02期
关键词：
laser sintering; composite; Al/SiC; densification;
D O I：
10.1016/j.scriptamat.2008.03.007
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The direct laser sintering of Al-7Si-0.3Mg/SiC composites was studied. It is shown that the densification rate obeys first-order kinetics. The rate constant is found to increase at low SiC fractions but abruptly decreases at >similar to 5 vol.%. In the presence of ceramic particles, the melt track becomes more stable and a more continuous sintered surface is obtained. Meanwhile, significant reaction occurs between the aluminum melt and the reinforcement particles, leading to formation of Al4SiC4 and silicon particles. The solidification microstructure is also altered. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：199 / 202
页数：4
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