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

Published

Author(s)

Kil-Won Moon, Carelyn E. Campbell, Maureen E. Williams, William J. Boettinger

Abstract

Diffusion couple experiments between various Co-rich face centered cubic alloys in the Co-W-Al ternary system have been conducted at 900 degree C and 1000 degree 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 the best fit the experimental concentration vs. 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.
Citation
Journal of Phase Equilibria and Diffusion

Keywords

Co-W-Al ternary system, diffusivity, Sauer-Fries method, DICTRA, mobility database optimization, experiment data error reduction

Citation

Moon, K. , Campbell, C. , Williams, M. and Boettinger, W. (2016), Diffusion in FCC Co-Al-W Alloys at 900 degree C and 1000 degree C, Journal of Phase Equilibria and Diffusion (Accessed April 24, 2024)
Created August 17, 2016, Updated March 17, 2017