Study on high temperature evolution of pore structure and permeability characteristics of C/SiC composites based on in-situ X-ray computed tomography

Ceramic matrix composites (CMC) possess numerous distributed pore structures created during manufacturing, which can function as microchannels for fluid flow. This study examines the internal pores evolution process of C/SiC composites through in-situ X-ray computed tomography at varying temperatures. Visualize and analyze the three-dimensional geometric morphology and evolution behavior of composite materials at various temperatures through CT image reconstruction. Simultaneously, the pore network model was employed to model the microchannel structure of composite materials at different temperatures, extracting material pore characteristic parameters. The results suggest a close relationship between the mechanical properties of samples at different temperatures and their internal evolution behavior. The pore network model can identify the material's pore characteristic parameters and forecast the evolution trend of its permeability characteristics at varying temperatures.