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Investigation of Surface Grooves from Migrating Grain Boundaries

Munoz, Nicole E and Gilliss, Shelley R and Ravishankar, N and Carter, Barry C (2002) Investigation of Surface Grooves from Migrating Grain Boundaries. In: MRS Proceedings, 750 .

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Visible-light microscopy (VLM) and atomic-force microscopy (AFM) were used to study the progression of grain-boundary grooving and migration in high-purity alumina (Lucalox™). Groove profiles from the same grain boundaries were revisited using AFM following successive heat-treatments. The grooves measured from migrating grain boundaries were found to have asymmetric partial-angles compared to those measured from boundaries that did not migrate during the experiment. For a moving boundary, the grain with the larger partial-angle was consistently found to grow into the grain with the smaller partial-angle. Migrating boundaries were observed to leave behind remnant thermal grooves. The observations indicate that the boundary may be bowing out during the migration process.

Item Type: Journal Article
Publication: MRS Proceedings
Publisher: Cambridge University Press
Additional Information: Copyright of this article belongs to Cambridge University Press.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 18 Aug 2011 07:02
Last Modified: 18 Aug 2011 07:02
URI: http://eprints.iisc.ac.in/id/eprint/39902

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