Selective Laser Thermoregulation System for Accelerated Deg-radation Test of SiC/SiC CMCs

SiC/SiC ceramic matrix composites (CMCs) are expected to improve the efficiency of aircraft engines. To confirm the reliability of SiC/SiC CMCs, it is necessary to clarify their physical deterioration in a high-temperature and high-humidity environment that simulates an aircraft engine. For the accelerated degradation test of SiC/SiC CMCs, we developed a heating test system, called the Selective Laser Thermoregulation (SLT) system, that uses a fiber laser and a galvano mirror system. This system can adjust the heat input under a steam environment and when the cooling state changes dynamically. We first performed a numerical simulation to design the SLT system and numerically confirmed that it can heat a SiC ceramic sample to over 1400 C. We then fabricated the proposed system and confirmed that it can heat a SiC ceramic sample to over 1400 C and safely maintain this temperature.