Enhanced tribological properties of Y/MoS2 composite coatings prepared by chemical vapor deposition
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Yi, J.
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Enhanced tribological properties of Y/MoS2 composite coatings prepared by chemical vapor deposition
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Abstract
Chemical vapor deposition (CVD) is an efficient approach to prepare coatings on complex cutting tools. However, MoS2 with self-lubrication ability and excellent tribological properties fabricated by CVD have been rarely reported in literature. The aim of this study was to deposit pure MoS2 coatings and yttrium (Y) doped MoS2 (Y/MoS2) composite coatings on cemented carbide blades coated with titanium nitride by CVD. The structural and mechanical properties of the coatings were examined by scanning electron microscopy (SEM) and nanoindentation, respectively. The results demonstrated that the microstructure of Y/MoS2 composite coatings was denser than that of the pure MoS2 coating. The hardness and the adhesional properties were significantly enhanced for the Y/MoS2 composite coatings. The tribological performance of the as-deposited coatings were investigated under atmospheric environment. Y/MoS2 compostite coatings demonstrated an enhanced tribological performance with a stable and low coefficient of friction (COF) over the entire sliding time. In contrast, the COF of pure MoS2 coating dramatically increased to value above 0.3 after a sliding time of only 30 min. Additionally, the Y/MoS2 composite coatings showed a decreased wear rate (8.36 +/- 0.29 x 10(-7) mm(3)/Nm) compared to the pure MoS2 coatings (3.41 +/- 0.48 x 10(-5) mm(3)/Nm) thus reflecting an improvement by two order of magnitude.
Patrocinador
National Key Research and Development Project
2017YFE0128600
National Natural Science Foundation of China (NSFC)
51705482
Ningbo 3315 Innovation Team
Y90331DL02
Science and Technology Innovation 2025 Major Project of Ningbo
2018B10046
National Defense Key Laboratory Fund
6142807180511
6142905192806
Innovation Funding of State Oceanic Administration
NBHY-2017-Z3
Ningbo Industrial Technology Innovation Project
2016B10038
Foundation of State Key Laboratory of Solid lubrication
LSL-1912
'Key Talents' Senior Engineer Project of Ningbo Institute of Materials Technology and Engineering
Chinese Academy of Sciences President's International Fellowship Initiative
2020VEC0006
ANID-CHILE
Fondecyt 11180121
VID of the University of Chile
U-Inicia UI013/2018
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Artículo de publicación ISI Artículo de publicación SCOPUS
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URI: https://repositorio.uchile.cl/handle/2250/177864
DOI: 10.1016/j.ceramint.2020.06.157
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Ceramics International 46 (2020) 23813–23819
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