Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
In the previous study, three-dimensionally networked porous carbon (TNPC) was used as a preform of the ablator. As a result, recession resistance was same level with that of the conventional one. Oxidation and sublimation of carbon were considered as causes of damage. Therefore, it is considered that recession resistance can be improved by dispersing SiC particles which have excellent oxidation resistance. Thus, we dispersed the SiC particles in TNPC. Compression test was conducted by using samples in which the particle size and volume fraction of SiC were changed. Strength was lower than matrix regardless of the particle size and volume fraction. It was confirmed that both the strength and the Young's modulus of the sample with a particle size of 1.2 μm, were larger than those of the sample with a particle size of 4.0 μm. At a volume fraction of 48%, it was confirmed that the more smaller particle diameter, the more the strength has increased. Regarding the Young's modulus, it increased with increasing the volume fraction in the sample with particle size 1.2 μm, while no significant change was confirmed in the sample with particle size 4.0 μm．The strength of the sample with added particles was lower than that of the sample without particles, however the strength was higher than a typical lightweight ablator (PICA), and it was considered useful as a preform for ablator.
