Nanocomposites of aluminum alloy-MoSi2: Synthesis and characterization

Published on Oct 1, 2015in Journal of Composite Materials1.972
· DOI :10.1177/0021998314560384
Mahmood Sameezadeh3
Estimated H-index: 3
(Shahid Beheshti University),
Hassan Farhangi11
Estimated H-index: 11
(UT: University of Tehran),
Massoud Emamy32
Estimated H-index: 32
(UT: University of Tehran)
Nanocomposites of AA 2024 aluminum alloy matrix reinforced with nano-sized MoSi2 particles were produced using mechanical alloying method followed by cold and hot pressing. Phase stability analysis, hardness, and room temperature compression tests of the composites were performed. In addition, absorb energy calculation and fracture behavior evaluation of the compression test specimens were carried out. The results indicated that the composite constituents exhibit good stability during the high temperature processing. The hardness and compressive strength of the composites show a steady increase for nano-sized MoSi2 particle contents up to 3 vol.% and exceed values of 150 HB and 800 MPa, respectively followed by a small drop at higher contents, most probably due to the particle agglomeration. Fractographic investigations of compression test specimens revealed that the failure mode of the composites with lower amount of reinforcement is mainly dimple ductile fracture while, with increasing the reinforcement...
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