High-temperature thermal conductivity measurement of porous ceramic coatings with a high heat flux CO2 laser rig

被引:1
作者
Zhao, Lei [1 ]
Hsu, Pei-Feng [1 ,2 ]
机构
[1] Florida Inst Technol, Dept Mech & Civil Engn, Melbourne, FL 32901 USA
[2] Florida Inst Technol, Ctr Adv Coatings, Melbourne, FL USA
关键词
CO2; laser; porous media; temperature gradient; thermal barrier coatings; thermal conductivity; yttrium-stabilized zirconia; BARRIER COATINGS; DIFFUSIVITY MEASUREMENTS; YTTRIA;
D O I
10.1111/ijac.14952
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Yttrium-stabilized zirconia (YSZ) plays a crucial role in thermal barrier coatings widely used to protect metallic components in gas turbine engines against high-temperature combustion product gases and harsh environments. The thermal conductivity of these coatings is a critical parameter influencing the gas turbine design, performance, and service life. In this study, a laser temperature gradient method is utilized to measure the thermal conductivity of porous YSZ coatings. The method employs specialized laser energy delivery to create a one-dimensional temperature gradient through the sample thickness, closely simulating the operational condition. This approach provides an effective, direct means to determine the thermal conductivity of high-temperature heat-resistant porous ceramic materials.
引用
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页数:10
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