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A nickel alloy matrix high-temperature self-lubricating coating(77.5 wt%(Ni-Cr-Mo-Al)-12.5 wt%Ag-10 wt%BaF2/CaF2)was prepared by plasma spraying technique.Results show that the Vickers microhardness of coating is(2.9±0.5)GPa,and the average bonding streng