Calculation of the gamma/gamma ' interface free energy in the Ni-Al system by the capillary fluctuation method
Y Mishin, MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 22, 045001 (2014).
Monte Carlo computer simulations with an embedded-atom potential are applied to study coherent gamma/gamma ' interfaces in the Ni-Al system. The (1 0 0) interface free energy has been extracted from the power spectrum of equilibrium shape fluctuations (capillary waves) and found to decrease with temperature from about 20 mJ m(-2) at 550K to about 10 mJ m(-2) at 1200 K. These numbers are in reasonable agreement with existing experimental data. Strengths and weaknesses of the capillary wave method are discussed.
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