Journal
SCRIPTA MATERIALIA
Volume 174, Issue -, Pages 33-38Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.08.021
Keywords
3D Monte Carlo simulation; Coarsening kinetics; Surface diffusion; Bi-continuous microstructure; Nanoporous gold
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Funding
- Basic Research Program through the National Research Foundation of Korea [NRF-2017R1D1A1B03034664]
- National Research Foundation of Korea [NRF-2015R1A5A1037627]
- Ministry of Science, ICT and Future Planning (MSIP)
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The coarsening of the two-phase, bi-continuous microstructure via surface diffusion is simulated using a three-dimensional Monte Carlo (MC) model. The coarsening exponent obtained from simulations initially decreases and then saturates at similar to 4 as the temperature increases. Kinetic analysis on nanoporous gold (np-Au) samples, annealed at 450 and 600 degrees C, confirms the prediction of the model. The coarsening probability ratio of np-Au between two annealing temperatures, calculated from the reported activation energy for coarsening of np-Au, is comparable to that of the model, signifying that the simulation successfully mimics the kinetic evolution of the thermally coarsened np-Au via surface diffusion. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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