Regarding the SiC particulates size associated microstructural characteristics on the aging behavior of Al-4.5Cu metallic matrix

Journal Article · Sun Feb 01 00:00:00 EST 1998 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(97)00220-1· OSTI ID:605685

Gupta, M; Lai, M O; Boon, M S; Herng, N S ^[1]

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1. National Univ. of Singapore (Singapore). Dept. of Mechanical and Production Engineering

In this study, aging characteristics of an aluminum-based metallic matrix reinforced with two different sizes of silicon carbide were investigated. The results showed similar aging kinetics in the case of unreinforced samples and composite samples containing coarser (34.4 {micro}m) SiC particulates and accelerated aging kinetics in the case of composite samples containing finer (8 {micro}m) SiC particulates. Results of microstructural characterization studies show that composite samples containing finer SiC particulates exhibited finer grain size, lower porosity, reduced cluster-to-particulate-size ratio, and superior interfacial integrity. The accelerated aging kinetics exhibited by composite samples containing a distribution of finer SiC particulates, when compared to the unreinforced and reinforced samples containing a distribution of coarser SiC particulates, were rationalized in terms of their microstructural characteristics.

• OSTI ID: 605685
• Journal Information: Materials Research Bulletin, Vol. 33, Issue 2; Other Information: PBD: Feb 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON CARBIDES
ALUMINIUM BASE ALLOYS
MICROSTRUCTURE
AGING
COPPER ALLOYS
REINFORCED MATERIALS
PARTICLE SIZE
GRAIN SIZE
POROSITY
MECHANICAL PROPERTIES