| 학회 | 한국재료학회 |
| 학술대회 | 2015년 가을 (11/25 ~ 11/27, 부산 해운대그랜드호텔) |
| 권호 | 21권 2호 |
| 발표분야 | D. 구조 재료 |
| 제목 | Deformation Properties of Zr added TiC Matrix Eutectic Composite at High Temperature |
| 초록 | Transition metal carbides are often called hard metal carbides and are of potential use in high temperature applications. TiC is expected to have the highest specific strength because it has the lowest density among the transition metal carbides, and hence it is most attractive for high temperature applications. Monocarbides of group Ⅳa, Ⅴa and Ⅵ a transition metals have very high melting points above 2900 K, extremely high hardness and excellent high temperature strengths, as well as thermal and electrical conductivities as good as those of metals. Many investigations on the mechanical behavior of TiC have been reported, but its high temperature deformation has not yet been well established. Deformation properties of Zr added TiC matrix eutectic composite have been investigated in compression test at high temperatures from room temperature to 2053 K and strain rates from 4.0×10-5/s to 5.0×10-3/s. It is found that this material shows excellent high temperature strength as well as appreciable room temperature toughness, suggesting that the material is a good candidate for high temperature application as structure material. From the observed high temperature deformation behavior, it is argued that the excellent high temperature strength is due to the constraining of deformation in the Mo phase by thin TiC which are considerably stronger than bulk TiC. It is also concluded that the appreciable room temperature toughness is ascribed to the frequent branching of crack paths as well as to the plastic deformation of the Mo phase. This work has been supported by SYOWA Co. Ltd., Tokyo (Japan). |
| 저자 | 신순기 |
| 소속 | 강원대 |
| 키워드 | plastic deformation; Zr; TiC; eutectic composite; compression test; high temperature strength |
