期刊
ADVANCES IN MECHANICAL ENGINEERING
卷 13, 期 8, 页码 -出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/16878140211040714
关键词
Sliding wear; solid lubricants; electron microscopy; surface analysis
资金
- China Postdoctoral Science Foundation [2019M662484]
- Henan Postdoctoral Foundation
- Postdoctoral Foundation of Anyang Institute of Technology [BHJ2019006]
- Foundation of Henan Educational Committee [19A460011]
- Doctoral Start-Up Funding of Anyang Institute of Technology [BSJ2018005]
- Project for Science and Technology Plan of Henan Province [192102210010]
- Tribology Science Fund of State Key Laboratory of Tribology [SKLTKF18B09]
- Provincial College Students Innovation and Entrepreneurship Training Program of Henan Province [S202011330001]
- Sichuan Provincial Key Lab of Process Equipment and Control [GK201901]
Curled multilayer graphene nanosheets and plastic deformation of silver contribute to the improvement of mechanical and tribological behaviors of TA-graphene-silver alloys.
Requirements of low energy consumption and material-volume reduction in the aerospace industry have spurred improvements of mechanical and tribological behaviors of TiAl (TA) alloys. TA-graphene (TAG) has poorer mechanical properties (6.02 +/- 0.42 GPa nano-hardness, 150 +/- 12.32 GPa elasticity modulus, and 802 +/- 21 MPa yield strength) than (6.25 +/- 0.52 GPa nano-hardness, 159 +/- 14.21 GPa elasticity modulus, and 850 +/- 19 MPa yield strength) of TA-graphene-silver (TAGS). Multilayer graphene nanosheets were curled into small loops to resist the applied forces, and helped to improve the mechanical properties of the TAGS. Subsequently, the graphene nanosheets enhanced the tribological performances as observed by the ball-on-disk tribometer. The following factors were primarily responsible for more excellent tribological behaviors (approximately 0.27 friction coefficient, 2.82 x 10(-4) mm(3) N-1 m(-1) wear rate) of TAGS than those of the TAG: intra-lamellar separation of graphene, graphene-enhanced capacity of wear scar, plastic deformation of silver, the excellent cooperation lubrication of graphene-silver, the low-hardness lubrication film on the grain-refined layer, the well-distributed film grain, and low grain orientation angles.
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