Sintering Behavior of Nanocrystalline γ-Ni-Fe Powders
- Title
- Sintering Behavior of Nanocrystalline γ-Ni-Fe Powders
- Author
- 이재성
- Issue Date
- 2000-01
- Publisher
- Minerals Metals Materials Society
- Citation
- Metallurgical and Materials Transactions A, v. 31, no. 2, page. 503-510
- Abstract
- Solid state sintering behavior of nanocrystalline (35 nm) gamma-Ni-Fe powders, which were sintered under hydrogen atmospheres at temperatures up to 1300 K, was investigated by laser-photo-dilatometry. The sinterability of the gamma-Ni-Fe powders was found to depend crucially on the state of agglomeration and was generally limited to about 80 pet theoretical density. Metallographic observations revealed that the nanocrystalline powders showed a high degree of agglomeration which resulted in a difficult-to-sinter bimodal pore distribution. Although nanoscale intraagglomerate porosity was easily eliminated in the course of sintering, microscale interagglomerate porosity largely proved to resist densification. Experimentally observed shrinkage rates exhibit two densification maxima at the onset and the end of densification. No significant grain growth was observed during sintering.
- URI
- https://link.springer.com/article/10.1007/s11661-000-0286-9https://repository.hanyang.ac.kr/handle/20.500.11754/162139
- ISSN
- 1073-5623
- DOI
- 10.1007/s11661-000-0286-9
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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