Effect of graphite content on the wear behavior of Al/2SiC/Gr hybrid nano-composites respectively in the ambient environment and an acidic solution

Effects of graphite (Gr) content on the dry sliding wear, solid-particle erosion and corrosive wear of Al6061based hybrid nano-composites fabricated via powder metallurgy route containing 2vol% of SiC nano-particles and 0,2, 5 and 7vol%of micron-sized Gr particles were investigated. The hardness of...

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Bibliographic Details
Published inTribology international Vol. 103; pp. 620 - 628
Main Authors Mosleh-Shirazi, S., Akhlaghi, F., Li, D.Y.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2016
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Summary:Effects of graphite (Gr) content on the dry sliding wear, solid-particle erosion and corrosive wear of Al6061based hybrid nano-composites fabricated via powder metallurgy route containing 2vol% of SiC nano-particles and 0,2, 5 and 7vol%of micron-sized Gr particles were investigated. The hardness of these composites decreased almost linearly with their Gr content, accompanied with decreased erosion resistance at 90° particle impingement. Also the conductive Gr particles as the micro-cathodes enhanced galvanic effect and resulted in an increase in the corrosion rate and thereby stronger corrosive wear of nano-composites. The Al6061/2SiC/2Gr nano-composite exhibited the minimum wear rate and friction coefficient. [Display omitted] •The hardness of Al/2SiC/Gr nanocomposites decreased by increased Gr content.•By 2% Gr addition both the friction coefficient and wear rate of composites decreased.•Composites contained more than 2% Gr exhibited inferior wear and friction properties.•Gr had a negative effect on the resistance to high-angle solid-particle erosion.•Gr enhanced galvanic effect and increased corrosion rate and corrosive wear.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2016.08.016