Influence of Spraying Pressure on Single-pass and Single-layer Cold-sprayed Pure Cu Coatings Deposited on Different Substrates
Under different spraying pressures,pure copper particles are deposited on AZ31B magnesium alloy plate and 6061 T6 aluminum alloy plate to form a single layer of pure copper coating.By observing the cross section and microscopic tissue of the coating,measuring the coating thickness with an optical microscope,detecting the surface rough-ness and morphology of the coating with a three-dimensional profilometer,and measuring the shear strength between the coating and the substrate with a shear strength testing device,the influence of different spraying pressure on the coating thickness,roughness and shear strength is studied.The results show that,the coating thickness increases on both AZ31B magnesium alloy substrate and 6061 T6 aluminum alloy substrate,and the coating thickness on aluminium alloy substrate is higher than the coating thickness on magnesium alloy substrate.The coating surface roughness value also increases gradually with the increase of spraying pressure,but the surface quality of the coating on the aluminium alloy substrate is better compared to the aluminium alloy substrate.In addition,the shear strength between the coating and the substrate also increases gradually with the increase of spraying pressure,accompanied by the combination strength of AZ31B mag-nesium alloy substrate with pure copper coating is higher than that of 6061 T6 aluminium alloy substrate with pure cop-per.
cold spraypure Cu coatingthicknesssurface roughnessshear strength
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