NDLI: Quantitative analysis for kinetics of reactive diffusion in the Fe

Content Provider	Springer Nature Link
Author	Kajihara, M. Yamashina, T.
Copyright Year	2006
Abstract	In the binary Fe–Cr system, the γ phase with the face-centered cubic structure becomes a stable intermediate phase sandwiched between the Fe-rich α$_{1}$ and Cr-rich α$_{2}$ phases with the body-centered cubic structure in the temperature range between T = 1,119 and 1,185 K. Within this temperature range, the reactive diffusion between the α$_{1}$ and α$_{2}$ phases was experimentally observed by Nishizawa and Chiba (Nishizawa and Chiba (1970) J Jap Inst Met 34:629). In their experiment, Fe/Cr diffusion couples were annealed at T = 1,123–1,163 K for up to 600 h. Although the γ phase should be formed due to annealing, it was not recognized in any annealed diffusion couples. The mathematical model reported in a previous study (2004 Acta Mater 52:1193) was used to analyze their experimental results theoretically. In order to provide the boundary conditions for the analysis, the phase diagram in the Fe–Cr system was computed by a CALPHAD technique. The analysis indicates that the γ phase is actually produced at the interface but its thickness is less than 1 μm even after annealing at T = 1,163 K for 600 h. Thus, the γ phase is practically invisible under their experimental conditions. The analysis provides the experimental conditions for the γ phase to grow to observable thicknesses.
Starting Page	2432
Ending Page	2442
Page Count	11
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	42
Issue Number	7
e-ISSN	15734803
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2006-12-22
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics Crystallography Continuum Mechanics and Mechanics of Materials Polymer Sciences Characterization and Evaluation of Materials Materials Science
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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