Journal
COMPOSITES PART B-ENGINEERING
Volume 70, Issue -, Pages 149-155Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2014.10.052
Keywords
Metal-matrix composites (MMCs); Wear; Mechanical testing
Funding
- National Natural Science Foundation of China [51275370]
- Fundamental Research Funds for the Central Universities [2014-yb-004]
- Project for Science and Technology Plan of Wuhan City [2013010501010139]
- Academic Leader Program of Wuhan City [201150530146]
- Project for Teaching and Research project of Wuhan University of Technology [2012016]
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Multilayer graphene (MLG) shows an attractive prospect for the demanding engineering applications. This paper reports the mechanical and tribological properties of MLG reinforced Ni3Al matrix composites (NMCs) under dry sliding at varying sliding speed. The hardness and elastic modulus of the NMCs are significantly influenced with MLG content. It is found that the hardness and elastic modulus of the NMCs are found to be increased by increasing MLG content up to 1.0 wt.%, while decreased when MLG content is above 1.0 wt.%. Tribological experiments suggest that MLG can dramatically improve the wear resistance and decrease the friction coefficient of the NMCs. Such marked improvement of wear resistance is attributed to the reinforcing mechanisms of MLG, such as crack deflection and pull-out, and reduction of friction coefficient is related to the formation of a tribofilm on the sliding contact surface. (C) 2014 Elsevier Ltd. All rights reserved.
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