Title

Synthesis, Characterisation And Mechanical Properties Of Sic Reinforced Al Based Nanocomposites Processed By Ma And Sps

Keywords

Aluminium alloys; Hardness; Mechanical alloying; Microstructure; Silicon carbide; Spark plasma sintering

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°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°C, is used. © 2013 Institute of Materials, Minerals and Mining.

Publication Date

4-1-2013

Publication Title

Powder Metallurgy

Volume

56

Issue

2

Number of Pages

149-157

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1179/1743290112Y.0000000029

Socpus ID

84877877023 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84877877023

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