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Nanomaterials 2019, 9(3), 370; https://doi.org/10.3390/nano9030370

Nanoparticle Enhanced Eutectic Reaction during Diffusion Brazing of Aluminium to Magnesium

1
School of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, West Yorkshire, UK
2
Mechanical Engineering Department, University of Technology, Jamaica, 237 Old Hope Road, Kingston, Jamaica
3
King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia
*
Author to whom correspondence should be addressed.
Received: 22 January 2019 / Revised: 27 February 2019 / Accepted: 1 March 2019 / Published: 5 March 2019
(This article belongs to the Special Issue Frontiers in Nanostructure Stability: Nanocrystalline Materials)
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Abstract

Diffusion brazing has gained much popularity as a technique capable of joining dissimilar lightweight metal alloys and has the potential for a wide range of applications in aerospace and transportation industries, where microstructural changes that will determine the mechanical and chemical properties of the final joint must be controlled. This study explores the effect of Al2O3 nanoparticles on the mechanical and microstructural properties of diffusion brazed magnesium (AZ31) and aluminium (Al-1100) joints. The results showed that the addition of Al2O3 nanoparticle to the electrodeposited Cu coating increased the volume of eutectic liquid formed at the interface which caused a change to the bonding mechanism and accelerated the bonding process. When the Cu/Al2O3 nanocomposite coatings were used as the interlayer, a maximum bond strength of 46 MPa was achieved after 2 min bonding time while samples bonded using pure-Cu interlayers achieved maximum strength after 10 min bonding time. Chemical analysis of the bond region confirmed that when short bonding times are used, the intermetallic compounds formed at the interface are limited to the compounds consumed in the eutectic reaction. View Full-Text
Keywords: microstructure; transient liquid phase diffusion brazing; nanoparticles; interlayer; electrodeposited microstructure; transient liquid phase diffusion brazing; nanoparticles; interlayer; electrodeposited
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Akhtar, T.S.; Cooke, K.O.; Khan, T.I.; Shar, M.A. Nanoparticle Enhanced Eutectic Reaction during Diffusion Brazing of Aluminium to Magnesium. Nanomaterials 2019, 9, 370.

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