Fabrication, microstructure and mechanical properties of self-diffusion gradient cermet composite tool materials
Abstract Self-diffusion gradient cermet composite tool materials were fabricated by vacuum hot pressing process at different temperatures (from 1450°C to 1575°C) for different holding times (from 20min to 50min) under 32MPa. A new subsurface layer enriched with metal binder was formed due to self-diffusion driving force after sintering. The surface layer had a higher hardness, while the substrate had a high flexural strength, as well as the subsurface layer had a good interface bonding strength. The relationships among sintering processes, mechanical properties and microstructure were discussed. The experimental results showed that both the sintering temperature and holding time had a great influence on the flexural strength and fracture toughness, while a relatively small effect on the hardness. For the sintering parameters considered, it was revealed that the sintering temperature of 1500°C and the holding time of 40min were in the vicinity of optimum to yield the desired mechanical properties and fine microstructure. Both grain sizes and the rim phase of the Ti(C,N) increased and the Ni content in the substrate decreased when sintering temperature varied from 1450°C to 1575°C and holding time varied from 20min to 50min. Compared with Ti(C,N)-based cermet, the self-diffusion gradient cermet exhibited better comprehensive mechanical performance.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기