Interdiffusion in the Face-Centered Cubic Phase of the Co-Al-W-Ta System Between 1090 and 1240 °C |
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| Authors: | A Epishin A Chyrkin G Nolze J Midtlyng H M Mayer N Petrushin W Reimers |
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| Affiliation: | 1.Institute of Materials Science and Technologies,Technical University of Berlin,Berlin,Germany;2.Department of Chemistry,Taras Shevchenko National University of Kyiv,Kiev,Ukraine;3.Energy and Climate (IEK-2),Forschungszentrum Jülich GmbH,Jülich,Germany;4.Federal Institute for Materials Research and Testing (BAM),Berlin,Germany;5.All-Russian Scientific Research Institute of Aviation Materials (VIAM),Moscow,Russia |
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| Abstract: | Interdiffusion of Al, W, Ta and Co in a Co-base alloy at temperatures between 1090 and 1240 °C has been investigated. The interdiffusion coefficients were found to be close to those reported for these elements in Ni-base alloys. Combining the diffusion simulation software DICTRA with the Ni-base diffusion databases TCNi5 and MobNi3, the interdiffusion profiles of Co, Al W, and Ta were modeled for Co9Al8W2Ta/Co diffusion couples annealed at different temperatures and for different times. The results show that interdiffusion in the Co-Al-W-Ta alloys can be modeled reasonably well using the available commercial databases for thermodynamics and kinetics of Ni-base systems. |
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