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GYSZ-NiCr2O4复相陶瓷材料的高温稳定性及隔热能力研究
Study on High Temperature Stability and Thermal Insulation Ability of GYSZ-NiCr2O4 Composites
【摘要】 针对目前热障涂层光子导热较高的问题,设计了Gd掺杂YSZ-NiCr2O4复相陶瓷材料(GYSZ-NCO),并对其烧结参数、热稳定性及热导率进行了分析。结果表明,在烧结温度为1600℃时可获得四方相GYSZ材料,且GYSZ-NCO系列材料在1500℃下具有较高的热稳定性,保温300 h无相变发生,加入NiCr2O4后,GYSZ材料热导率在高温下无明显回升,表现出了优良的抗光子导热能力,GYSZ-5%NCO材料热导率最低,在1200℃时仅为2.23 W/(m·K)。
【Abstract】 In view of the high photonic thermal conductivity of thermal barrier coatings, a Gd-doped YSZ-NiCr2O4 composite(GYSZ-NCO)was designed, and its sintering parameters, thermal stability and thermal conductivity were analyzed. The results show that tetragonal GYSZ can be obtained when the sintering temperature is 1600 ℃. The GYSZ-NCO series materials have high thermal stability at 1500 ℃, and no phase transition occurs after holding for 300 h. After adding NiCr2O4, the thermal conductivity of GYSZ does not rebound significantly at high temperature, showing excellent thermal conductivity against photons. GYSZ-5%NCO material has the lowest thermal conductivity, which is only 2.23 W/(m·K)at 1200 ℃.
【Key words】 thermal barrier coatings; photonic thermal conductivity; high temperature stability;
- 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2023年04期
- 【分类号】TG174.4;V25
- 【下载频次】35