Effects of particle size on coatings for hollow spherical zirconia powder
As a new material of thermal barrier coatings in aero-engine,hollow sphere-shaped zirconium oxide powder has the higher performance in fluidity,fusibility and deposit efficiency compared with the solid random-shaped zirconia,which makes the coatings pos sess more closed-pores,better thermal-resistant effect,moderate tenacity and stronger oxidation-resistant ability with less defects such as unmelted particles and through-holes. In the process of plasma spray,the particle size distribution of hollow spherical zirconia is the most important factor for spraying performance and coating quality when the powders already hold the regular sphere shape and certain degree of hollowness. This paper has investigated the powder properties of many kinds of particle size distribution for hollow spherical zirconia,and the bond strength,metallographic structure and porosity of corresponding coatings as well as deposit efficiency of powders have been tested to analyze the effect of particle size distribution for spraying performance and coating quality. Then the effort of distributing these powders correctly has been paid to find out the scheme with better integrated performance.
particle size distribution thermal barrier coatings hollow spherical zirconia
ZHANG Xin REN Xianjing ZENG Keli
Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
611-614
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）