Title
Synthesis, characterisation and mechanical properties of SiC reinforced Al based nanocomposites processed by MA and SPS
Abbreviated Journal Title
Powder Metall.
Keywords
Aluminium alloys; Silicon carbide; Mechanical alloying; Spark plasma; sintering; Microstructure; Hardness; STRUCTURAL EVOLUTION; MATRIX COMPOSITES; PARTICLES; POWDERS; ALLOYS; Metallurgy & Metallurgical Engineering
Abstract
Al based alloys reinforced with different amounts (5, 12 and 20 wt-%) of nanosized SiC particulates were synthesised by mechanical alloying and consolidated by the spark plasma sintering (SPS) technique. The distribution of the reinforcement phase in the composite was evaluated as a function of the milling time and the amount of SiC. The processed materials were characterised by scanning electron microscopy and energy dispersive spectroscopy for the morphology and composition and X-ray diffraction. Continuous reduction in crystallite size was observed as milling progressed and after milling for 20 h the resulting powders reached a grain size of < 100 nm. These Al-SiC composites were successfully consolidated by the SPS method at different sintering temperatures of 400, 450 and 500 degrees C. It is suggested that a higher hardness can be achieved even at 20 wt-% SiC when a higher sintering temperature, for example, above 500 degrees C, is used.
Journal Title
Powder Metallurgy
Volume
56
Issue/Number
2
Publication Date
1-1-2013
Document Type
Article
Language
English
First Page
149
Last Page
157
WOS Identifier
ISSN
0032-5899
Recommended Citation
"Synthesis, characterisation and mechanical properties of SiC reinforced Al based nanocomposites processed by MA and SPS" (2013). Faculty Bibliography 2010s. 3599.
https://stars.library.ucf.edu/facultybib2010/3599
Comments
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