Abstract
In the present study high energy ball mill was implemented to produce aluminum (Al) matrix composite powders reinforced with silicon carbide (SiC). To clarify the role of particle size of SiC on lattice strain and grain size of Al two series of SiC with micron and nano-size were selected. Aluminum and SiC powders were mixed mechanically and milled at different times (2, 5, 10 h) to achieve Al–2.5 vol%SiC and Al–5 vol%SiC composite powders. The produced composites were investigated using X-ray diffraction pattern (XRD) to elucidate the role of particle size, secondary phase content and milling time on grain size and lattice strain of Al matrix. The results showed that an increase in milling time caused to reduce the grain size unlike the lattice strain of Al matrix. At the same condition a faster grain refinement for Al/SiC nanocomposites were observed with respect to Al/SiC composites.
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