(1. 西南石油大學(xué) 油氣藏地質(zhì)及開(kāi)發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室，成都 610500；
2. 中國(guó)石油大學(xué)(北京) 化學(xué)化工學(xué)院，北京 102249)
摘 要: 利用自行研制的納米摻雜AZ−20熱噴涂粉末，采用大氣等離子噴涂技術(shù)，在35號(hào)鋼基體上制備Al2O3/ZrO2復(fù)合材料熱障涂層，對(duì)涂層的組織結(jié)構(gòu)及性能進(jìn)行分析。結(jié)果表明：制備的涂層是由四方結(jié)構(gòu)的t′-ZrO2與六方結(jié)構(gòu)的α-Al2O3構(gòu)成的，具有納米晶與微米晶混晶組織；涂層孔隙率為11.2%，孔隙尺度較均勻；涂層硬度HV100為702，抗磨損能力較常規(guī)AZ-20涂層高約25%；涂層具有良好的隔熱性能。
關(guān)鍵字: Al2O3/ZrO2；等離子噴涂；熱障涂層；隔熱性能
nano-doping Al2O3/ZrO2 plasma spray coatings
（1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest
Petroleum University, Chengdu 610500, China;
2. School of Chemistry and Chemical Engineering, Petroleum University of China (Beijing), Beijing 102249, China）
Abstract:The thermal barrier coating of Al2O3/ZrO2 composite coatings on 35# steel substrate were prepared by the air plasma spraying with self-developed AZ−20 nano-doping thermal spray powder. The coating consists of cubic t′-ZrO2 and hexagonal structure α-Al2O3 in nanometer and micrometer; the coating has the uniform porosity of 11.2% and hardness HV100 of 702. Its antiwear ability succeeds that of AZ−20 by about 25%; the coating has good thermal insulation performance.
Key words: Al2O3/ZrO2; plasma spray; thermal barrier coating; thermal insulation performance
