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- W3025138434 endingPage "125910" @default.
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- W3025138434 abstract "The MoO 3 /CuO binary oxides were selected as the potential high temperature lubricants in this work based on the ionic potential and cation polarizability approach correlated to the lubricity of solid oxides. The NiAl composite coatings with addition of 10, 30, and 50 wt% of MoO 3 /CuO (1:1) were fabricated via atmospheric plasma spraying (APS) technology. The tribological properties of these NiAl-MoO 3 /CuO composite coatings were evaluated from room temperature to 800 °C, and the basic wear mechanisms were investigated as well. The results show that, at 800 °C, the composite coating with 30 wt% of MoO 3 /CuO led to the lowest friction coefficient (approximately 0.16) and wear rate (3.7 × 10 −5 mm 3 N −1 m −1 ). These superior tribological outcomes were attributed to the synergistic lubricating effect of MoO 3 , CuO, NiO and NiMoO 4 which formed on the worn surfaces via tribo-chemical reactions. Meanwhile, the decomposition of CuMoO 4 formed by tribo-chemical reaction and worked synergistically to reduce the friction coefficient and wear rate at high temperatures. Meanwhile, the decomposition of CuMoO 4 formed via tribo-chemical reaction of MoO 3 and CuO at high temperature was observed at 800 °C sliding. • The binary oxides were selected based on the ionic potential and cation polarizability approach. • The APS NiAl-MoO 3 -CuO composite coatings with typical dense internal structures • MoO 3 /CuO effectively improved the tribological properties of NiAl coating at high-temperature. • Lubricious CuMoO 4 and NiMoO 4 formed on worn surfaces via tribo-chemical reactions at high temperatures. • The decomposition of CuMoO 4 was observed at 800 °C." @default.
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- W3025138434 date "2020-08-01" @default.
- W3025138434 modified "2023-09-29" @default.
- W3025138434 title "High temperature tribological behaviors and wear mechanisms of NiAl-MoO3/CuO composite coatings" @default.
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- W3025138434 doi "https://doi.org/10.1016/j.surfcoat.2020.125910" @default.
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