Diffusion in FCC Co-rich Co-Al-W Alloys at 900 and 1000 °C

Diffusion couple experiments between various Co-rich face centered cubic (FCC) alloys in the Co-W-Al ternary system have been conducted at 900 and 1000 °C. Diffusion coefficients have been extracted for the Co-W binary and for ternary alloys at compositions where the diffusion paths cross. In additi...

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Published in:Journal of phase equilibria and diffusion 2016-08, Vol.37 (4), p.402-415
Main Authors: Moon, K. -W., Campbell, C. E., Williams, M. E., Boettinger, W. J.
Format: Article
Language:English
Subjects:
Ceramics
Composites
Crystallography and Scattering Methods
Engineering Thermodynamics
Glass
Heat and Mass Transfer
Metallic Materials
Natural Materials
Physics
Physics and Astronomy
Thermodynamics
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description Diffusion couple experiments between various Co-rich face centered cubic (FCC) alloys in the Co-W-Al ternary system have been conducted at 900 and 1000 °C. Diffusion coefficients have been extracted for the Co-W binary and for ternary alloys at compositions where the diffusion paths cross. In addition, a least squares method has been utilized to optimize diffusion mobility parameters using DICTRA simulations to best fit the experimental concentration versus distance curves. Predictions of the diffusion matrix using the refined mobility database are in good agreement with the values obtained at the diffusion path crossing points.
doi_str_mv 10.1007/s11669-016-0486-7
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subjects Ceramics
Composites
Crystallography and Scattering Methods
Engineering Thermodynamics
Glass
Heat and Mass Transfer
Metallic Materials
Natural Materials
Physics
Physics and Astronomy
Thermodynamics
title Diffusion in FCC Co-rich Co-Al-W Alloys at 900 and 1000 °C
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