Reinforcement coatings and interfaces in aluminium metal matrix composites

The interface between the matrix and reinforcement plays a crucial role in determining the properties of metal matrix composites (MMC). Surface treatments and coating of the reinforcement are some of the important techniques by which the interfacial properties can be improved. This review reports th...

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Bibliographic Details
Published in:Journal of materials science 1998-07, Vol.33 (14), p.3491-3503
Main Authors: RAJAN, T. P. D, PILLAI, R. M, PAI, B. C
Format: Article
Language:English
Subjects:
Alloying
Aluminum base alloys
Aluminum matrix composites
Aluminum oxide
Applied sciences
Ceramic coatings
Diffusion barriers
Diffusion coatings
Exact sciences and technology
Interface reactions
Interfacial properties
Materials science
Metals. Metallurgy
Multilayers
Powder metallurgy. Composite materials
Production techniques
Reinforcement
Residual stress
Silicon carbide
Technology
Temperature
Wettability
Wetting
Wetting agents
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Description
Summary:The interface between the matrix and reinforcement plays a crucial role in determining the properties of metal matrix composites (MMC). Surface treatments and coating of the reinforcement are some of the important techniques by which the interfacial properties can be improved. This review reports the state of art knowledge available on the surface treatments and coating work carried out on reinforcements such as carbon/graphite, silicon carbide (SiC) and alumina (Al2O3) and their effects on the interface, structure and properties of aluminium alloy matrix composites.The metallic coatings improved the wettability of reinforcement but at the same time changed the matrix alloy composition by alloying with the matrix. Ceramic coatings reduce the interfacial reaction by acting as a diffusion barrier between the reinforcement and the matrix. Multilayer coatings have multifunctions, such as wetting agent, diffusion barrier and releaser of thermal residual stress. The roles of reinforcement coating as a means of “in situ hybridising” and “in situ alloying” are described.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1004674822751