文献类型：会议论文

英文题名：Emission spectroscope diagnostics of direct current plasma jets used for YSZ equiaxed structure coatings

作者：Sun, Chengqi[1]; An, Liantong[1]; Gao, Yan[2]

机构：[1] College of Navigation, Guang Dong Ocean University, Zhanjiang, China; [2] Key Laboratory of Ship-Machinery Maintenance and Manufacture, Dalian Maritime University, Dalian, China

会议论文集：Advanced Materials, Processing and Testing Technology

会议日期：May 17, 2019 - May 18, 2019

会议地点：Guangzhou, China

语种：英文

外文关键词：Plasma spraying - Textures - Powder coatings - Sprayed coatings - Scanning electron microscopy - Yttrium oxide - Electron temperature - Yttria stabilized zirconia

外文摘要：This study combines spectroscope diagnostics of the plasma jet under APS and the characterization of sprayed coatings by using nanoparticles yttria partially stabilized zirconia (YSZ) powder. The absolute intensities of ArⅠneutral species spectrum lines were used to estimate the electron excited temperature of the thermal plasma jets by the Boltzmann method. The effects of the detection distances, current intensities and H2 flow rates on electron temperature were analyzed. The plasma sprayed YSZ coatings were heated to 1200℃ for 6 min under the atmosphere, and then the micro-structure of the nanostructured powder and coatings were analyzed by using Field Emission Scanning Electron Microscope. The results showed that the increase of input power and H2 content considerably increased the electron temperature, while the electron temperature decreased a lot with the increase of the detection distance. The coatings were consisted of the equiaxed grains and a small-size grain shape pores. ? 2019 Trans Tech Publications Ltd, Switzerland