Effect of braze flux on direct laser sintering Cu-based metal powder

被引:19
|
作者
Zhu, HH
Lu, L
Fuh, JYH
Wu, CC
机构
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
[2] Huazhong Univ Sci & Technol, State Key Lab Laser Technol, Wuhan 430074, Peoples R China
[3] So Taiwan Univ Technol, Dept Mech Engn, Tainan, Taiwan
关键词
direct laser sintering; microstructure; surface properties;
D O I
10.1016/j.matdes.2004.09.012
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Influence of braze flux on the wettability and densification in direct laser sintering Cu-based metallic powder has been investigated. The 0.3 similar to 3 wt% braze flux mainly consisting of KF (Potassium Fluoride) was added as an additive in the Cu-based metallic powder. The addition of the braze flux has dramatically improved the wettability and hence the density of the sintered samples. It has demonstrated that a small amount of flux increases the densification and sinterability while a large amount of flux additive shows negative effect in densification and sinterability. The relative density of the sample with 0.3 wt% braze flux additive increased about 7.1% compared to that of the sample without additive. Balling phenomenon was observed when higher percentage flux (1.2, 3 wt%) was used. However, the additive might cause residues covering on the surface leading to a deterioration of adhesion between the sintering layers. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:166 / 170
页数:5
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