Plasma Sprayed Al2O3-SiCw Coatings Deposited under the Electrostatic Field

摘要：

　　Al2O3-SiCw (SiC whisker) powders were plasma sprayed on carbon steel under the electrostatic field.Effect of voltage on the microstructure and mechanical properties of the coatings was investigated.The erosion resistance was measured on the rotating disk erosion tester.The micro hardness and fracture toughness were obtained by the indentation method.It is found that the phase composition is unchanged for the coatings deposited in the presence or absence of electrostatic field while the grain size of coatings varies with the voltage.The porosity of coatings increases with the voltage slightly at first,and then a decrement tendency can be found.The erosion weight loss shows the similar trends with the porosity under the influence of voltage.The fracture toughness is the lowest when the voltage is 10 kV,and it is the highest for coatings deposited under no electrostatic field.The measurement of hardness yields the similar results though the voltage is different.The deflection behaviour of whiskers under the electrostatic field affects the deposition of molten powder and then the microstructure and properties of plasma sprayed coatings.

关键词： Plasma spraying Al2O3-SiCw coating Whisker Erosion Toughness

作者: Jingye Yu Weize Wang Liangmin Wu Zhengqu Feng

作者单位: Key Laboratory of Pressure System and Safety,Ministry of Education,East China University of Science and Technology,Shanghai200237,China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 419-424

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）