Effect of graphene on the microstructure, thermal conductivity, and tribological behavior of cast B319 Al alloy

被引:4
作者
Pillari, Lava Kumar [1 ]
Lessoway, Kyle [1 ]
van der Kuur, Colin [2 ]
Lombardi, Anthony [3 ]
Byczynski, Glenn [3 ]
Bichler, Lukas [1 ]
机构
[1] Univ British Columbia Okanagan, Sch Engn, Kelowna, BC V1V 1V7, Canada
[2] Zentek Ltd, 24 Corp Court, Guelph, ON N1G 5G5, Canada
[3] Nemak USA Canada, 4655 GN Booth Dr, Windsor, ON N9C 4G5, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
B319 Al alloy; Graphene; Composite; Friction; Wear; Thermal conductivity; ALUMINUM-MATRIX COMPOSITE; FLAKE POWDER-METALLURGY; DRY SLIDING WEAR; MECHANICAL-PROPERTIES; DELAMINATION THEORY; TENSILE PROPERTIES; ENERGY DESCRIPTION; HEAT-TREATMENT; SI ALLOYS; FRICTION;
D O I
10.1016/j.wear.2023.205201
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In this research, the effect of adding 0.1 - 0.7 wt% of graphene on the microstructure, hardness, thermal conductivity, and tribological response of cast B319 Al alloy was investigated. Addition of 0.1 wt% graphene increased the hardness of cast B319 alloy from 77 to 92 HV, which was the result of grain refinement and the modification of the Si phase. At 0.3 wt% graphene, the composite achieved optimal wear resistance, as the average coefficient of friction (CoF) decreased from 0.42 to 0.20, a -52% reduction with respect to the base B319 alloy. Similarly, the average wear volume and specific wear rate of 0.3 wt% graphene composite showed a -36% (measured by weight loss) and -32% (measured by the laser microscopy) reduction compared to the base alloy. The improved wear resistance of the composite was attributed to its higher hardness caused by microstructural refinement, high stability of the mechanically mixed layer (MML), and the formation of a graphenerich lubricating layer on the contact surfaces. The results obtained from this study on B319-graphene composites could pave the way for developing lightweight and high-performance wear-resistant components for nextgeneration automotive applications.
引用
收藏
页数:17
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