[T14] High Temperature Materials

[15F-T14-06] Fabrication of ZrB₂-SiC and its Related Composites by SPS and Their Oxidation Behavior

*H. Morishita¹, D. Elsner², R. Kobayashi¹, S. Maruyama¹, K. Komurasaki³, A. Momozawa¹ (1.Tokyo City University, Japan, 2.University of Stuttgart, Germany, 3.The University of Tokyo, Japan)

Keywords:spark plasma sintering, boride ceramics, silicon carbide, thermal protection system, oxidation

ZrB2 is a leading candidate for TPS for re-entry vehicles due to its high melting point, thermal shock resistance, and low density. ZrB2 does not fully possess oxidation resistance necessary for surviving the re-entry condition. It improves oxidation resistance when composited with SiC and can withstand the intense oxidation environment caused by aerodynamic heating during re-entry. In order to develop TPS, high-density ZrB2-SiC with different composition ratios were fabricated by the spark plasma sintering (SPS). In this research, ZrB2-SiC and related materials of UHTC, TiB2-SiC and TiC-ZrC, were fabricated by SPS and oxidation behavior was evaluated.