Thermal Grooving by Surface Diffusion: a Review of Classical Thermo-Kinetics Approach

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Hittite Journal of Science and Engineering
Volume:4 Issue:1
Thermal Grooving by Surface Diffusion: a Review of Classical Thermo-Kinetics Approach

Thermal Grooving by Surface Diffusion: a Review of Classical Thermo-Kinetics Approach

Authors : Oncu AKYİLDİZ, Tarik Omer OGURTANİ

Pages : 7-16

Doi:10.17350/HJSE19030000042

View : 36 | Download : 8

Publication Date : 2017-06-30

Article Type : Research Paper

Abstract :I n polycrystalline materials wherever a grain boundary intersects a free surface and whenever the topographic variation associated with the atomic motion is favored by total free energy dissipation, the material surface grooves. In this review, we focused on the grain boundary grooving by surface diffusion which is an active mechanism at moderate temperatures and for grooves small in size. Starting with a description of the classical thermo-kinetics treatment of the process, we briefly reviewed Mullins’ very first modeling effort with a small slope assumption at the groove root and further considerations regarding finite slopes, different grain geometries, and anisotropic surface free energies. We concluded by giving examples of experimental observations in accord with theoretical calculations
Keywords : Thermal grooving, Grain boundary groove, Surface diffusion

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