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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Published in | Tribology international Vol. 103; pp. 620 - 628 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.11.2016
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Subjects | |
Online Access | Get full text |
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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.
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•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. |
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ISSN: | 0301-679X 1879-2464 |
DOI: | 10.1016/j.triboint.2016.08.016 |