The heterogeneous multilayer interface of VN/Ag coatings and transition multilayer interface of VN/Ag coatings were prepared on Inconel 781 and Si(100),and the microstructures,mechanical and tribological properties we...The heterogeneous multilayer interface of VN/Ag coatings and transition multilayer interface of VN/Ag coatings were prepared on Inconel 781 and Si(100),and the microstructures,mechanical and tribological properties were investigated from 25 to 700℃.The results showed that the surface roughness and average grain size of VN/Ag coatings with transition multilayer interface are obviously larger than those of VN/Ag coatings with heterogeneous multilayer interface.The coatings with transition multilayer interface have higher adhesion force and hardness than the coatings with heterogeneous multilayer interface,and both coatings can effectively restrict the initiation and propagation of microcracks.Both coatings have excellent self-adaptive lubricating properties with a decrease of friction coefficient as the temperature increases,but their wear rates reveal a drastic increase.The phase composition of the worn area of both coatings was investigated,which indicates that a smooth Ag,Magnéli phase(V2O5)and bimetallic oxides(Ag3VO4 and AgVO3)can be responsible to the excellent lubricity of both coatings.To sum up,the coatings with transition multilayer interface have excellent adaptive lubricating properties and can properly control the diffusion rate and release rate of the lubricating phase,indicating that they have great potential in solving the problem of friction and wear of mechanical parts.展开更多
VN and VCN coatings were prepared using multi-arc ion plating technique on 316L stainless steel and single silicon sub-strates.Microstructures,mechanical performances,corrosion behaviors and tribology properties of VN...VN and VCN coatings were prepared using multi-arc ion plating technique on 316L stainless steel and single silicon sub-strates.Microstructures,mechanical performances,corrosion behaviors and tribology properties of VN and VCN coatings in the atmosphere,distilled water and seawater were contrastively tested.It was confirmed that the VCN coating had a typi-cal nanocystallite/amorphous structure.Moreover,the hardness increased from 30.5 to 36.5 GPa and the corrosion current density decreased from 2.16×10^(−6) to 0.82×10^(−6)A cm^(−2) after carbon was doped into the VN coating.Compared with the VN coating,the VCN coating had the lowest friction coefficient of 0.26 and wear rate of 0.68×10^(−6)mm^(3)Nm^(−1) in seawater,which could be ascribed to the lubrication of graphitization transfer film and improvement of the comprehensive performance.展开更多
基金Project(51505100)supported by the National Natural Science Foundation of China
文摘The heterogeneous multilayer interface of VN/Ag coatings and transition multilayer interface of VN/Ag coatings were prepared on Inconel 781 and Si(100),and the microstructures,mechanical and tribological properties were investigated from 25 to 700℃.The results showed that the surface roughness and average grain size of VN/Ag coatings with transition multilayer interface are obviously larger than those of VN/Ag coatings with heterogeneous multilayer interface.The coatings with transition multilayer interface have higher adhesion force and hardness than the coatings with heterogeneous multilayer interface,and both coatings can effectively restrict the initiation and propagation of microcracks.Both coatings have excellent self-adaptive lubricating properties with a decrease of friction coefficient as the temperature increases,but their wear rates reveal a drastic increase.The phase composition of the worn area of both coatings was investigated,which indicates that a smooth Ag,Magnéli phase(V2O5)and bimetallic oxides(Ag3VO4 and AgVO3)can be responsible to the excellent lubricity of both coatings.To sum up,the coatings with transition multilayer interface have excellent adaptive lubricating properties and can properly control the diffusion rate and release rate of the lubricating phase,indicating that they have great potential in solving the problem of friction and wear of mechanical parts.
基金the Program of Qingjiang Excellent Young Talents,Jiangxi University of Science and Technology,Natural Science Foundation of Jiangxi Province(Grant 20181BBE58001)Natural Science Foundation of Jiangxi Education Department(Grant GJJ180431).
文摘VN and VCN coatings were prepared using multi-arc ion plating technique on 316L stainless steel and single silicon sub-strates.Microstructures,mechanical performances,corrosion behaviors and tribology properties of VN and VCN coatings in the atmosphere,distilled water and seawater were contrastively tested.It was confirmed that the VCN coating had a typi-cal nanocystallite/amorphous structure.Moreover,the hardness increased from 30.5 to 36.5 GPa and the corrosion current density decreased from 2.16×10^(−6) to 0.82×10^(−6)A cm^(−2) after carbon was doped into the VN coating.Compared with the VN coating,the VCN coating had the lowest friction coefficient of 0.26 and wear rate of 0.68×10^(−6)mm^(3)Nm^(−1) in seawater,which could be ascribed to the lubrication of graphitization transfer film and improvement of the comprehensive performance.
