Title: Optimization of Plasma Spraying Technology for Fabricating CuNiln Coating on Blade of Aircraft Engine Fan
Abstract: CuNiln coating was prepared on Ti6Al4 V substrate by air plasma spraying so as to provide technological support for its application in protecting the blade of domestic aircraft engine fan.The microstructure and morphology of as-prepared CuNiln coating were analyzed with a metallographic microscope,and its porosity as well as interfacial pollutants was analyzed as well.Moreover,the effects of spraying power,spraying distance and substrate surface roughness on the bonding strength and microhardness of asfabricated CuNiln coating were investigated,and the plasma spraying technology was optimized.Results showed that elevating spraying power led to increase of microhardness and decrease of bonding strength of the CuNiln coating.With the increase of the spraying distance,the microhardness and bonding strength of the coating tended to rise initially but decline later.With the increase of the substrate surface roughness,the bonding strength of the coating increased,but the powder sedimentation rate decreased.The optimized plasma spraying parameters were suggested as spraying power of 32.3 kW,spraying distance of 85 mm and substrate surface roughness of 6.3μm(sand- blast by 36 mesh corundum).The CuNiln coating obtained under the optimized plasma spraying parameters exhibited a bonding strength of 45.83 MPa,a microhardness of 159.2 HV and a porosity of 0.578%,showing potential for the protection of the blade of domestic aircraft engine fan.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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