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Assessment of Mobilities of the B2 Phase in the Nickel-Chromium-Aluminum System

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Abstract:

A model for diffusion is applied to the nickel-chromium-aluminum (Ni-Cr-Al) system to optimize the mobility parameters for the B2 phase by fitting the experimentally obtained inter-diffusivities. In the model, the activation energy for diffusion is expressed as a function of the degree of ordering which is evaluated from thermodynamic data. These data are used to evaluate the thermodynamic factors of the B2 phase in the Ni-Cr-Al ternary system. The interdiffusivities from the model are used to simulate diffusion experiments. The results are generally agreed with the experimental data.

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Periodical:

Materials Science Forum (Volume 789)

Pages:

477-488

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.789.477

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Online since:

April 2014

Authors:

Hong Yu Zhang, Jin Sen Tian, Li Hong Liang, Hua Wei*, Qi Zheng, Tao Jin, Xiao Feng Sun

Keywords:

Diffusion, Mobility, Thermodynamic Modeling

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