Interfacial reactions between aluminum nitride reinforcement particles and aluminum alloys in Al-AlN metal matrix composites

Interfacial precipitation in Al-AlN composites and its influence on mechanical properties are examined. It is shown that Al alloys with 3% Mg content are not suitable in MMCs reinforced by AlN. Intermetallic precipitates Al2Cu or AlCu2Mg induce a brittle behaviour of composites based on a AlCu4Mg1 m...

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Bibliographic Details
Published in:Journal of materials science letters 2001-09, Vol.20 (17), p.1577-1583
Main Authors: CHEDRU, M, CHERMANT, J. L, VICENS, J
Format: Article
Language:English
Subjects:
Applied sciences
Dispersion hardening metals
Exact sciences and technology
Metals. Metallurgy
Powder metallurgy. Composite materials
Production techniques
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Summary:Interfacial precipitation in Al-AlN composites and its influence on mechanical properties are examined. It is shown that Al alloys with 3% Mg content are not suitable in MMCs reinforced by AlN. Intermetallic precipitates Al2Cu or AlCu2Mg induce a brittle behaviour of composites based on a AlCu4Mg1 matrix even after solution treatment at high temperature. A spinel interfacial precipitation is observed in AlMgSi0.5-AlN composite and only a slight change in the mechanical behaviour is observed after long term heat treatments. 16 refs.
ISSN:0261-8028
DOI:10.1023/A:1017956617203