Alumina particulate reinforced aluminium-nickel intermetallic matrix composite
- Univ. of South Australia, The Levels (Australia). Metallurgy Dept.
Intermetallic compounds containing aluminium and nickel such as AlNi, Ni{sub 3}Al or Al{sub 3}Ni offer new opportunities for developing low density, high strength structural alloys which may be utilized at temperatures higher than presently feasible with conventional alloys such as nickel-based superalloys. The aluminades have the attractive characteristics of high specific strength and good corrosion and oxidation resistance coupled with non-strategic element constituents and lower cost. The anomalous mechanical properties of the aluminades make them even more attractive. Furthermore, the introduction of high temperature ceramic reinforcements such as Al{sub 2}O{sub 3}, SiC or even graphite fibres, whiskers or particulates should enable materials designers and manufacturers to fabricate high performance materials. The major drawback of intermetallics, however, is lack of ductility it lower temperatures, but they are generally more ductile than ceramics. The superior ductility of intermetallics is mainly attributed to the presence of metallic bonds in contrast to ionic or covalent bonding in ceramics. There are several techniques to synthesize intermetallic compounds including conventional melting and casting, reactive sintering of constituent powders and more recently, the chemically induced shock consolidation of the constituent powders. The fabrication methods for intermetallic based composites however, are similar to metal matrix composites at least for the time being. These include casting low pressure casting, and powder metallurgy routes such as hot pressing, hipping and conventional compacting and sintering. The present investigation is undertaken to study the microstructural characteristics of Al/Ni intermetallic matrix composites manufactured with different techniques and reinforcement. This is the first article to examine Al{sub 2}O{sub 3} particulate reinformed Al-18% Ni alloy.
- OSTI ID:
- 143712
- Report Number(s):
- CONF-930246-; ISBN 0-87339-251-5; TRN: IM9413%%222
- Resource Relation:
- Conference: Advanced composites `93: international conference on advanced composite materials (ICACM), Wollongong (Australia), 15-19 Feb 1993; Other Information: PBD: 1993; Related Information: Is Part Of Advanced composites 1993; Chandra, T. [ed.] [Univ. of Wollongong (Australia)]; Dhingra, A.K. [ed.] [DuPont, Wilmington, DE (United States)]; PB: 1464 p.
- Country of Publication:
- United States
- Language:
- English
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