Oxygen-covered tungsten crystal shape: Time effects, equilibrium, surface energy and the edge-rounding temperature

SURFACE SCIENCE

卷:605

Article

Szczepkowicz, Andrzej

关键词: Equilibrium crystal shape;    Surface energy;    Adsorption;    Faceting;    Tungsten;    Oxygen;    Curved surfaces;    Field ion microscopy;   

DOI  :  10.1016/j.susc.2011.06.005

来源: Elsevier

【 摘 要 】

The equilibrium crystal shape (ECS) of an oxygen-covered tungsten microcrystal is studied as a function of temperature. A specially designed ultrafast crystal quenching setup with the cooling rate of 6000 K/s allows to draw conclusions about ECS at high temperatures. The edge-rounding transition is shown to occur between 1300 K and 1430 K. The ratio of surface free energies gamma(111)/gamma(211) is determined as a function of temperature. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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