期刊
APPLIED PHYSICS LETTERS
卷 95, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3212733
关键词
adsorption; ceramics; grain boundaries; interface phenomena; melting; order-disorder transformations; wetting
资金
- U.S. DOE Office of Basic Energy Science [DE-FG02-08ER46511]
A thermodynamic model for coupled adsorption and disordering transitions at grain boundaries is developed by combining diffuse-interface and lattice-gas models and incorporating colloidal type interfacial forces. This model produces a systematical spectrum of interfacial phenomena for grain boundaries, including first-order and continuous coupled prewetting and premelting transitions, critical points, multilayer adsorption, layering and roughening, and complete wetting and drying, and it produces a series of grain boundary phases (complexions) with character similar to those observed by [Dillon , Acta Mater. 55, 6208 (2007)]. The presence of dispersion and electrostatic forces in ceramic materials can appreciably change grain boundary transitions.
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