Interdiffusion within the β-phase region of the Ni-Co-Cr-Al quaternary system
Author(s)
Wei, H
Zhang, HY
Sun, XF
Dargusch, MS
Yao, X
Griffith University Author(s)
Year published
2010
Metadata
Show full item recordAbstract
Interdiffusion coefficients within the beta-phase region of the nickel-cobalt-chromium-aluminum (Ni-Co-Cr-Al) quaternary system were estimated by square root diffusivity analysis. The obtained results indicated that the cross interdiffusion coefficients D-ij (i not equal j, i, j = Al, Cr, Co) other than D-AlCo, were less than the main interdiffusion coefficients Do (i = j), and that the values of D-Ali were greater than those of D-Cri and D-Coi. This finding suggests that the addition of chromium decreases the interdiffusion coefficients of aluminum and cobalt, but the addition of cobalt did not cause an obvious change in ...
View more >Interdiffusion coefficients within the beta-phase region of the nickel-cobalt-chromium-aluminum (Ni-Co-Cr-Al) quaternary system were estimated by square root diffusivity analysis. The obtained results indicated that the cross interdiffusion coefficients D-ij (i not equal j, i, j = Al, Cr, Co) other than D-AlCo, were less than the main interdiffusion coefficients Do (i = j), and that the values of D-Ali were greater than those of D-Cri and D-Coi. This finding suggests that the addition of chromium decreases the interdiffusion coefficients of aluminum and cobalt, but the addition of cobalt did not cause an obvious change in the interdiffusion coefficients of aluminum and chromium in the beta-phase region. The different effects associated with the additions of chromium and cobalt were qualitatively discussed in light of the relationship between the thermodynamic properties of the system and Wagner's interaction parameter. The results revealed that the different effects could be ascribed to the stronger thermodynamic interactions between aluminum and cobalt compared to that between aluminum and chromium. (C) 2009 Elsevier B.V. All rights reserved.
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View more >Interdiffusion coefficients within the beta-phase region of the nickel-cobalt-chromium-aluminum (Ni-Co-Cr-Al) quaternary system were estimated by square root diffusivity analysis. The obtained results indicated that the cross interdiffusion coefficients D-ij (i not equal j, i, j = Al, Cr, Co) other than D-AlCo, were less than the main interdiffusion coefficients Do (i = j), and that the values of D-Ali were greater than those of D-Cri and D-Coi. This finding suggests that the addition of chromium decreases the interdiffusion coefficients of aluminum and cobalt, but the addition of cobalt did not cause an obvious change in the interdiffusion coefficients of aluminum and chromium in the beta-phase region. The different effects associated with the additions of chromium and cobalt were qualitatively discussed in light of the relationship between the thermodynamic properties of the system and Wagner's interaction parameter. The results revealed that the different effects could be ascribed to the stronger thermodynamic interactions between aluminum and cobalt compared to that between aluminum and chromium. (C) 2009 Elsevier B.V. All rights reserved.
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Journal Title
Journal of Alloys and Compounds
Volume
493
Issue
1-2
Subject
Condensed matter physics
Solid state chemistry
Physical properties of materials
Materials engineering
Resources engineering and extractive metallurgy