Design of the Selective Laser Thermoregulation System for Accelerated Degradation Test of SiC/SiC CMC

摘要

SiC/SiC CMCs (Ceramics Matrix Composites) is expected as a new material for aircraft engines to improve the efficiency of it. In order to confirm the reliability of SiC/SiC CMCs, it is necessary to clarify the physical/scientific deterioration of SiC/SiC CMCs in high temperature and high humidity environment simulating an aircraft engine. To realize the accelerated degradation test of SiC/SiC CMCs, we developed heating test system using a fiber laser and a Galvano mirror system named Selective Laser Thermoregulation (SLT) system. This system is expected that the heat input can be compensated even under the steam environment or even when the cooling state changes dynamically. At first, we performed numerical simulation to design the SLT system and numerically confirmed that this system is expected to have an ability to heat a SiC target peace over 1400 °C. Afterwards, we created new system and confirmed it was really able to heat a SiC target peace over 1400 °C and keep the temperature safely. It is necessary to consider temperature dependency of specific heat for realiz-ing more accurate numerical simulation.