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摘要
Black ceramic coating was formed on the surface of ZL101 aluminum alloy in alkaline phosphas solution containing NH4VO3 and Na2WO3 by micro-arc oxidation, the voltage was increased by several steps.The black coating is u niform and consists mainly of amorphous, Al2O3, VO2, W and mullites.The color of coating underwent four steps of change from multicolour, dark gray, brown to black.
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