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金属学报(英文版) 1998
THERMAL STRUCTURAL DISORDER AND MELTING TRANSITION IN HIGH-ANGLE GRAIN-BOUNDARY: A MOLECULAR-DYNAMICS STUDYKeywords: moleculandynamics,grainboundary,structural transition Abstract: 1.IntroductionThereexistscontroversywiththestructuralstabilityofabicrystallineinterfaceatelectedtemperatures.TheissueisthatwhetheritremainscrystallineuptoTinorun-dergoespremelting.Premeltingheremeansthatthegrainboundarycompletelylosesitscrystallineorderandsuchalossofcrystallineordercanbe'kept'withthesystemevolvillgatatemperaturewellbelowTin.Ontheexperimentalside,anumberofgrain-boundarymeasurementssuggestindirectlythatsomekindofstructuraltransitioncouldtakeplaceattemperattireswellbelowTinllZ…
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