(1. 北京礦冶研究總院 金屬材料研究所, 北京 100044；
2. 中南大學(xué) 材料科學(xué)與工程學(xué)院， 長沙 410083)
摘 要: 以納米結(jié)構(gòu)氧化釔部分穩(wěn)定的氧化鋯熱噴涂粉末為原料， 采用大氣熱等離子體噴涂法制備了納米結(jié)構(gòu)熱障涂層。 利用掃描電子顯微鏡和X射線衍射儀對粉末原料及涂層的微觀組織和結(jié)構(gòu)進(jìn)行分析， 并對涂層的結(jié)合強(qiáng)度及熱導(dǎo)率進(jìn)行測定。 結(jié)果表明， 納米結(jié)構(gòu)熱障涂層具有優(yōu)異的性能， 熱導(dǎo)率為1.1 W/(m·K)， 界面結(jié)合強(qiáng)度為47 MPa。 并分析了涂層納米結(jié)構(gòu)組織對涂層性能的影響， 明確了優(yōu)化涂層微觀組織結(jié)構(gòu)和提高涂層性能的具體方法。
關(guān)鍵字: 納米結(jié)構(gòu)熱障涂層； 等離子體噴涂； 氧化釔部分穩(wěn)定氧化鋯
nanostructured TBCs fabricated by
plasma spraying
REN Xian-jing1, LI Zhen-duo1
（ 1. Sub-institute of Metal Materials, Beijing General Research Institute of
Mining and Metallurgy, Beijing 100044, China;
2. School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract: The nanostructured thermal barrier coatings (TBCs) were fabricated by atmospheric plasma spraying (APS) with nanostructured yttrium partially stabilized zirconia (YPSZ) powder feedstocks. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were applied to analyze the microstructures and phase compositions of the nanostructured powder feedstocks and coating. The results show that the thermal conductivity of the TBCs is 1.1 W/(m·K) and the bonding strength of the TBCs is 47 MPa. The model of the bonding strength and thermal conductivity of the nanostructured TBCs was presented. The relation between microstructures and properties of the nanostructured TBCs was discussed. And finally, the way of optimizing microstructure and increasing properties of nanostructure TBCs was defined.
Key words: nanostructured thermal barrier coatings; plasma spraying; yttrium partially stabilized zirconia
