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Competitive Motions of Grain-Boundary and Free Surface in Selecting Thin Film Morphology

  • B. Sun (a1), Z. Suo (a1) and W. Yang (a2)

Abstract

During annealing of a polycrystalline thin film, grain-boundaries and film surfaces move. If the grain-boundaries move faster, the grains having the lowest free energy grow at the expense of others, resulting in a continuous film with large grains. If the film surfaces move faster, they groove along their junctions with the grain-boundaries, breaking the film to islands. This paper describes analytic solutions for steady surface motions, and discusses the morphology selection.

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6. Sun, B., Suo, Z. and Yang, W., Acta Mater. In press (1997).

Competitive Motions of Grain-Boundary and Free Surface in Selecting Thin Film Morphology

  • B. Sun (a1), Z. Suo (a1) and W. Yang (a2)

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