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5231 |
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Thursday, June 08, 2017, Hall 28 12:00 PM Tribological Coatings |
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Tribological behavior of flame-sprayed PTFE/Ni composite coatings |
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Xinkun Suo / Chinese Academy of Sciences, P.R. China Yuting Xu / Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, P.R. China Yi Liu*/ Chinese Academy of Sciences, P.R. China Yongfeng Gong/ Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, P.R. China Jing Huang/ Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, P.R. China Hua Li/ Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, P.R. China |
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PTFE-Ni core-shell powder was designed through electroless plating, and PTFE/Ni composite coatings were deposited using the core-shell powder by flame spraying. The microstructures were investigated using scanning electron microscope (SEM), thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The results show that the composite coatings presented dense microstructures, and the thermal decomposition of PTFE was undetectable. The microhardness was also measured, and the microhardness of composite coatings was lower than that of flame sprayed Ni coatings. The wear resistance and antifriction properties of the composite coatings were evaluated using a ball on disk friction and wear tester. The result shows that the composite coatings showed lower friction coefficient and wear rate compared to the Ni coatings. The investigation gives bright insight into the novel wear resistant and antifriction applications of thermal sprayed metal/polymer composite coatings. |