Silver nanoparticle-assisted diffusion brazing of 3003 Al alloy for microchannel applications

被引：16
作者：
Eluri, Ravi [1 ]
Paul, Brian K. [1 ]
机构：
[1] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97330 USA
来源：
MATERIALS & DESIGN | 2012年 / 36卷
基金：
美国国家科学基金会;
关键词：
Diffusion; Brazing; Microstructure; MELTING TEMPERATURE; SIZE; ALUMINUM; MICROLAMINATION; JOINT; POINT; METAL;
D O I：
10.1016/j.matdes.2011.11.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the current study, we investigated the effect of braze filler particle size and various processing parameters on vacuum diffusion brazing of thin foils of 3003 Al using a Ag nanoparticle (AgNPs) interlayer. All samples were brazed at 550 degrees C and 570 degrees C at heating rates of 5 degrees C/min and 25 degrees C/min under a pressure of 1 MPa. Differential scanning calorimetric results, involving 5 nm AgNPs, showed significant reduction in phase transformation temperature. Microstructures of brazed cross-sections revealed that nanoparticles aid formation of the joint at temperatures below the Al-Ag eutectic temperature of 567 degrees C. X-ray diffraction analysis of the interface showed the presence of delta-phase (Ag2Al) and mu-phase (Ag3Al). This was confirmed with energy dispersive spectroscopic analysis. A tensile strength of 69.7 MPa was achieved for a sample brazed at 570 degrees C with an interlayer of approximately 7 mu m in thickness. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：13 / 23
页数：11
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