Phase Evolution and Thermo-physical Properties of Rare-earth Oxides for Thermal Barrier Systems
作者： Byung-Chul Shim , Kil-Ho Kwak , Sung-Min Lee , Yoon-Suk Oh , Hyung-Tae Kim
DOI: 10.4150/KPMI.2010.17.2.148
关键词:
摘要: Thermal barrier systems have been widely investigated over the past decades, in order to enhance reliability and efficiency of gas turbines at higher temperatures. Yttria-stabilized zirconia (YSZ) is one most leading materials as thermal barriers due its low conductivity, thermodynamic stability, compatibility with metal substrates. In this work, rare-earth oxides pyrochlore phases for were investigated. Pyrochlore successfully formed via solid-state reactions started from oxide powders. For heat-treated samples, thermo-physical properties examined. These rare-oxide showed expansion conductivity 1.2~2.4 W/mK, which comparable YSZ.
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