Thermal inspection of SiC/SiC ceramic matrix composites

被引：6

作者：

Osiander, R ^{[1
]}

Spicer, JWM ^{[1
]}

Amos, JM ^{[1
]}

机构：

[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA

来源：

THERMOSENSE XX | 1998年 / 3361卷

关键词：

thermal NDE; infrared radiometry; ceramic matrix composites; thermal properties measurement;

D O I：

10.1117/12.304748

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Measurements of both through-thickness and lateral thermal diffusivities are described for a SiC/SiC ceramic matrix composite material. The measurement approach is one-sided and is based on the time-resolved infrared radiometry (TRIR) method in which the specimen is illuminated with a step heating pulse and the resulting temperature rise is monitored with an infrared focalplane array. An area heating source is used for the through-thickness measurement of thermal diffusivity and a line source is used for the lateral thermal diffusivity measurement. The results indicate that the thermal diffusivity values obtained using a model assuming surface absorption and emission have to be corrected since the composites show some infrared transparency accompanied by strong scattering. Additional measurements are presented on CMC components structures with possible porosity at bonds.

引用

页码：339 / 349

页数：11