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Nanoparticle enhanced eutectic reaction during diffusion brazing of aluminium to magnesium
Akhtar, T.S. Cooke, Kavian O. Khan, Tahir I. Shar, M.S.
Akhtar, T.S.
Cooke, Kavian O.
Khan, Tahir I.
Shar, M.S.
Publication Date
2019-03
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© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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Open Access status
openAccess
Accepted for publication
2019-03-01
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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.
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Published version
Citation
Akhtar TS, Cooke KO, Khan TI et al (2019) Nanoparticle enhanced eutectic reaction during diffusion brazing of aluminium to magnesium. Nanomaterials. 9(3): 370.
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Article