Abstract
Fiber-reinforced composites possess anisotropic mechanical and heat transfer properties due to their anisotropic fibers and structure distribution.In C/SiC composites,the out-of-plane thermal conductivity has mainly been studied,whereas the in-plane thermal conductivity has received less attention due to their limited thickness.In this study,the slab module of a transient plane source method is adopted to measure the in-plane thermal conductivity of a 2D plain woven C/SiC composite slab,and the test uncertainty is analyzed numerically.The numerical investigation proves that the slab module is reliable for measuring the isotropic and anisotropic slabs with in-plane thermal conductivity greater than 10 W·m-1·K-1.The anisotropic thermal conductivity of the 2D plain woven C/SiC composite slab is obtained within the temperature range of 20-900 ℃ by combining with a laser flash analysis method to measure the out-of-plane thermal conductivity.The results demonstrate that the out-of-plane thermal conductivity of C/SiC composite decreases with temperature,while its in-plane thermal conductivity first increases with temperature and then decreases,and the ratio of in-plane thermal conductivity to out-of-plane thermal conductivity is within 2.2-3.1.
基金项目
国家自然科学基金(52276086)
国家自然科学基金(52130604)
Basic Research Program of China(514010303-102)
王宽诚教育基金()
维普
万方数据