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Fabrication of silicon carbide reinforced aluminum matrix nanocomposites and characterization of its mechanical properties using non-destructive technique
Faculty
Science
Year:
2013
Type of Publication:
Article
Pages:
384-393
Authors:
El-Daly, A. A, Abdelhameed, M, Hashish, M, Daoush, Walid M
DOI:
10.1016/j.msea.2012.08.114
Journal:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING ELSEVIER SCIENCE SA
Volume:
559
Research Area:
Science \& Technology - Other Topics; Materials Science; Metallurgy \& Metallurgical Engineering
ISSN
ISI:000312623600050
Keywords :
Metal matrix composites, Microstructure, Mechanical properties, Non-destructive technique
Abstract:
The SIC nanoparticulate reinforced Al matrix composites (with 2.5-12.5 vol\%) were successfully fabricated by employing high energy ball milling with cold-pressing and sintering technology at 550 degrees C for 1 h. Microstructures and nanoparticulate distribution were analyzed with scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM). Mechanical property and hardness were studied using pulse echo overlap (PEO) method as a non-destructive technique. Microstructure analysis showed that the nanocomposites contained only alpha-Al and SiC phases with clean interface of thickness similar to 1.5 nm, and preserved nano-grained network structure. The SiC nanoparticulates were distributed uniformly in a metal matrix, and neither voids nor cracks were detected at the interface of Al/SiC. Besides, there was no reaction product has been found at the interface. Accordingly, the mechanical properties of composites reinforced by SiC nanoparticulates were significantly improved, while the Poisson's ratio of nanocomposites was retained. This was mainly due to the stronger interfacial bonding derived from direct mechanical interlocking between the adjacent component surfaces. (C) 2012 Elsevier B.V. All rights reserved.
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