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134 results on '"Ye, Yinping"'

42. Mechanical and tribological properties of Cr/Cr2O3 multilayer films.

Author

Wang, Feifei, He, Nairu, Li, Hongxuan, Ji, Li, Liu, Xiaohong, Ye, Yinping, Zhou, Huidi, and Chen, Jianmin

Abstract

Cr/Cr2O3 multilayer and single-layer films were deposited through multiple arc ion plating technique. The influence of modulation ratio on the mechanical and tribological properties was also investigated. Results show that the multilayer design of Cr/Cr2O3 films could improve the toughness of films, but a certain degree of hardness loss is also observed. The hardness and adherence strength are improved with the increase of Cr2O3 layer thickness. Furthermore, alternating layers of ductile soft metals and hard ceramics could suppress the propagation of microcracks and brittle fracture. However, the decrease of modulation ratio could causes a decline in the mechanical properties. The film with appropriate modulation ratio (Cr2O3:Cr ratio 10:1) exhibits better comprehensive properties than other films, this film also exhibits an excellent wear resistance with a high load of 10 N. Consequently, the wear life is improved from 6 m of the single-layer Cr2O3 film to 835 m of the multilayer film. [ABSTRACT FROM AUTHOR]

Published
2018
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44. Investigating the effect of LaF3 on the tribological performances of an environment friendly hydrophilic polyamide imide resin bonded solid lubricating coating.

Author

Wan, Hongqi, Ye, Yinping, Chen, Lei, Zhou, Huidi, Chen, Jianmin, and Li, Bin

Subjects
*LANTHANUM compounds, *POLYAMIDES, *IMIDES, *IMIDE synthesis, *LUBRICATION & lubricants
Abstract

The aims of this study are to prepare a new environment friendly hydrophilic polyamide imide (PAI) resin bonded molybdenum disulfide (MoS 2 ) solid lubricating coating and investigate the tribological properties and wear mechanism. It is concluded that the preparation of hydrophilic coating has greatly reduced usage rates of fossil fuel, in the meantime, the basic physical and chemical properties, mechanical and tribological behaviors of hydrophilic coatings with 3 wt.% LaF 3 are comparable to that of solvent-based resin coatings, the generation of FeF 2 and FeS significantly improves the adherence between friction pairs, and the degree of oxidation of MoS 2 lubricant is effectively restrained on account of the attachment of nano-LaF 3 to the surface of MoS 2 . [ABSTRACT FROM AUTHOR]

Published
2017
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45. Mechanical and tribological properties of Cr/Cr2O3multilayer films

Author

Wang, Feifei, He, Nairu, Li, Hongxuan, Ji, Li, Liu, Xiaohong, Ye, Yinping, Zhou, Huidi, and Chen, Jianmin

Abstract

Cr/Cr2O3multilayer and single-layer films were deposited through multiple arc ion plating technique. The influence of modulation ratio on the mechanical and tribological properties was also investigated. Results show that the multilayer design of Cr/Cr2O3films could improve the toughness of films, but a certain degree of hardness loss is also observed. The hardness and adherence strength are improved with the increase of Cr2O3layer thickness. Furthermore, alternating layers of ductile soft metals and hard ceramics could suppress the propagation of microcracks and brittle fracture. However, the decrease of modulation ratio could causes a decline in the mechanical properties. The film with appropriate modulation ratio (Cr2O3:Cr ratio 10:1) exhibits better comprehensive properties than other films, this film also exhibits an excellent wear resistance with a high load of 10 N. Consequently, the wear life is improved from 6 m of the single-layer Cr2O3film to 835 m of the multilayer film.

Published
2018
Full Text
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