文献类型：期刊文献

英文题名：Influence of Spray Angle on Particle Deposition and Thermal Shock Lifetime of Embedded Micro-Agglomerated Particle Coatings

作者：Tang, Zhongxiang[1];Yang, Ting[1];Zhang, Chengcheng[2];Wang, Weize[1];Liu, Shuainan[1];Liu, Wei[1];Liu, Chen[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]Commercial Aircraft Engine Co Ltd, Shanghai 200241, Peoples R China

年份：2024

卷号：14

期号：2

外文期刊名：COATINGS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001172310600001)】；

基金：No Statement Available

语种：英文

外文关键词：thermal barrier coating; plasma spraying; spray angle; thermal shock

摘要：The development of gas turbine technology has led to an increase in the complexity of the geometric shape of the sprayed workpiece. Consequently, it has become more difficult to maintain the perpendicularity of the spraying angle during the spraying process, thereby impacting the structure and performance of the coating. This study uses the atmospheric plasma spraying method to simultaneously spray two types of powder for the preparation of embedded micro-agglomerated particle (EMAP) coatings. The spraying process is conducted at four different angles, ranging from 90 degrees to 30 degrees, in order to analyze the influence of the spray angle on the particle deposition and coating performance. The experimental results demonstrate that the relative deposition efficiency, hardness, and elastic modulus of the EMAP coatings decreased as the spray angle decreased. The porosity exhibited a reduction when the spraying angle dropped from 90 degrees to 50 degrees, followed by a significant rise at 30 degrees. The greatest relative amount of second phase particles embedded in the coating appeared at a spraying angle of 90 degrees, amounting to 10.8%. The smallest amount was found at a spraying angle of 30 degrees, with a relative quantity of 2.2%. Furthermore, the molten droplets of the first phase matrix powder underwent extension and fragmentation along the angular direction at low angles. At an angle of 90 degrees, the maximum average thermal shock life was 40.6 cycles, with the best stability of thermal shock life. The decrease in the spraying angle resulted in a deterioration in both the thermal shock life and its stability.