Infrared brazing of Fe3Al intermetallic compound using gold-based braze alloy

被引：0
作者：
Ren-Kae Shiue
Shyi-Kaan Wu
I-Hong Li
机构：
[1] National Taiwan University,Department of Materials Science and Engineering
[2] National Taiwan University,Department of Mechanical Engineering
来源：
Gold Bulletin | 2011年 / 44卷
关键词：
Au-based filler; Brazing; Wetting; Fe; Al;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Infrared-brazing Fe3Al with Au–44Cu as filler metal has been investigated. The brazed joint consists mainly of a β-phase, Au8 − xCu4 + xAl4, caused by the dissolution of Al from Fe3Al substrate into the braze alloy. The depletion of Al from Fe3Al substrate results in the formation of a layer of β-phase particles dispersed in the Fe-rich phase. The highest shear strength for AuCu filler is 327 MPa for specimens infrared brazed at 880°C for 180 s. The brazed joint is mainly fractured along the central β-phase in which the fractograph exhibits quasi-cleavage with dimples. Increasing the brazing time or temperature will deteriorate the bonding strength of the joint, and the fracture mode is prone to cleavage of brittle fracture. Au–44Cu filler demonstrates a great potential for bonding Fe3Al intermetallic compound.
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页码：49 / 56
页数：7
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