| 학회 | 한국재료학회 |
| 학술대회 | 2009년 봄 (05/21 ~ 05/22, 무주리조트) |
| 권호 | 15권 1호 |
| 발표분야 | 구조재료 |
| 제목 | Densification and Oxidation behavior of HfC and TaC |
| 초록 | Transition metal borides and carbides are characterized by high melting points, high mechanical properties and relatively good oxidation resistance in extreme environments. This family of ceramic materials has come to be known as Ultra High Temperature Ceramics(UHTCs). Interest in UHTCs has increased significantly in recent years because of the drive to produce thermal protection systems (TPS) and other components for hypersonic aerospace vehicles. Among the UHTCs hafnium carbide (HfC) and tantalum carbide (TaC) have the highest melting point (＞3900 oC). But due to the high melting point, densification of HfC and TaC need pressure-assisted sintering procedures at temperatures higher than 2000 oC. In this study, sintering techniques used for the densification of HfC and TaC were hot pressing and pressureless sintering by using MoSi2 as a sintering aid. The microstructure, mechanical properties and oxidation behavior of dense HfC and TaC materials will be discussed. |
| 저자 | 이상보, 이승준, 김도경 |
| 소속 | KAIST 신소재공학과 |
| 키워드 | Oxidation; UHTCs |
