Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이재성 | - |
dc.date.accessioned | 2020-03-02T05:47:54Z | - |
dc.date.available | 2020-03-02T05:47:54Z | - |
dc.date.issued | 2004-01 | - |
dc.identifier.citation | Journal of Metastable and Nanocrystalline Materials, v. 19, Page. 55-68 | en_US |
dc.identifier.issn | 1422-6375 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/132019 | - |
dc.identifier.uri | https://www.scientific.net/JMNM.19.55 | - |
dc.description.abstract | An overview of self- (Fe, Ni) and solute (Ag) tracer diffusion in the well-compacted and sintered nanocrystalline (grain size d∼100nm) γ-Fe-40wt. % Ni alloy is presented. In the nanocrystalline material the individual nano-scaled grains turned out to be clustered in micrometer-sized agglomerates and two types of internal interfaces with different length scales and diffusion characteristics (the boundaries between the nano-grains and between the agglomerates of these nanocrystallites) act as different short-circuit diffusion paths. A systematics of grain boundary (GB) self- and solute diffusion in such bimodal structure is outlined. Well-known Harrison's kinetic regimes of GB diffusion in a unimodal structure, i.e. the C, B, and A regimes are subdivided into the C-B, B-B, AB-B, and A-B regimes, which were observed experimentally. The theoretical framework to extract diffusivities of the nanocrystalline and inter-agglomerate boundaries from the multi-stage experimental profiles is presented. The combination of GB diffusion measurements of Ag solute diffusion in nano- and coarse-grained γ-FeNi alloys allowed to establish the segregation behavior of Ag. The absolute values and the Arrhenius parameters of Fe, Ni, and Ag diffusion along the nanocrystalline boundaries in the nano-γ-FeNi alloy are similar to the corresponding GB diffusivities in coarse-grained polycrystalline γ-FeNi. However, the activation enthalpy of diffusion along the inter-agglomerate boundaries turned out to be notably smaller and the absolute diffusivities larger by several orders of magnitude than the corresponding diffusion values via the nano-boundaries. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Trans Tech Publications | en_US |
dc.subject | Grain Boundary Diffusion | en_US |
dc.subject | Interface Segregation | en_US |
dc.subject | Nanocrystalline Alloy | en_US |
dc.subject | Sintering | en_US |
dc.title | Grain Boundary Diffusion and Segregation in Compacted and Sintered Nanocrystalline Alloys | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.4028/www.scientific.net/JMNM.19.55 | - |
dc.relation.journal | Journal of Metastable and Nanocrystalline Materials | - |
dc.contributor.googleauthor | Divinski, Sergiy V. | - |
dc.contributor.googleauthor | Lee, Jai Sung | - |
dc.contributor.googleauthor | Herzig, Christian | - |
dc.relation.code | 2012211510 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING | - |
dc.identifier.pid | jslee | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.