Theoretical analysis of the electromagnetically accelerated plasma spraying(EMAPS)by self-developed is carried out.Governing equation of the plasma under dynamic loading conditions is derived.The plasma velocity as a ...Theoretical analysis of the electromagnetically accelerated plasma spraying(EMAPS)by self-developed is carried out.Governing equation of the plasma under dynamic loading conditions is derived.The plasma velocity as a function of time and the length of electrode are also obtained.NiCrAl coating is prepared on medium carbon steel substrate by EMAPS device.Microstructure and hardness of the coating are analyzed with scanning electron microscope(SEM)and hardness tester respectively.展开更多
The corrosion resistance of NiCrAl+（ZrO2+Y2O3）thermal barrier coating, formed with the plasma spraying technique, on the 18[CD*2]8 steel surface was investigated. The phase structure and morphology of the coating we...The corrosion resistance of NiCrAl+（ZrO2+Y2O3）thermal barrier coating, formed with the plasma spraying technique, on the 18[CD*2]8 steel surface was investigated. The phase structure and morphology of the coating were analyzed by means of X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The electrochemical corrosion behavior of the coating in 1.0mol/L H2SO4 solution was studied by using electrochemical measurement methods. The results show that the gradient plasma spraying coating is composed of the NiCrAlY primer coating and the （ZrO2+Y2O3 ） top coating, and the coating thickness is 360μm. The microhardness of coating reaches 1100HV. The corrosion resistance of the plasma sprayed coating of the 18[CD*2]8 steel surface is about 5 times as great as that of the original pattern. The corrosion resistance of the coating is enhanced notably.展开更多
基金Item Sponsored by"Fundamental Research Funds for the Central Universities[No.JB2011016]"
文摘Theoretical analysis of the electromagnetically accelerated plasma spraying(EMAPS)by self-developed is carried out.Governing equation of the plasma under dynamic loading conditions is derived.The plasma velocity as a function of time and the length of electrode are also obtained.NiCrAl coating is prepared on medium carbon steel substrate by EMAPS device.Microstructure and hardness of the coating are analyzed with scanning electron microscope(SEM)and hardness tester respectively.
文摘The corrosion resistance of NiCrAl+（ZrO2+Y2O3）thermal barrier coating, formed with the plasma spraying technique, on the 18[CD*2]8 steel surface was investigated. The phase structure and morphology of the coating were analyzed by means of X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The electrochemical corrosion behavior of the coating in 1.0mol/L H2SO4 solution was studied by using electrochemical measurement methods. The results show that the gradient plasma spraying coating is composed of the NiCrAlY primer coating and the （ZrO2+Y2O3 ） top coating, and the coating thickness is 360μm. The microhardness of coating reaches 1100HV. The corrosion resistance of the plasma sprayed coating of the 18[CD*2]8 steel surface is about 5 times as great as that of the original pattern. The corrosion resistance of the coating is enhanced notably.
