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Laser Modified Alumina: a Computational and Experimental Analysis

Laser surface modification involves rapid melting and solidification is an elegant technique used for locally tailoring the surface morphology of alumina in order to enhance its abrasive characteristics. COMSOL Multiphysics® based heat transfer modeling and experimental approaches were designed and used in this study for single and multiple laser tracks to achieve densely-packed multi-facet grains via temperature history, cooling rate, solidification, scanning electron micrographs, and wear rate. Multi-facet grains were produced at the center of laser track with primary dendrites extending toward the edge of single laser track. The multiple laser tracks study indicates the grain/dendrite size increases as the laser energy density increases resulting in multiplying the abrasive edges which in turn enhance the abrasive qualities.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc177232
Date12 1900
CreatorsMoncayo, Marco Antonio
ContributorsDahotre, Narendra B., Collins, Peter, Wang, Zhiqiang
PublisherUniversity of North Texas
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
FormatText
RightsPublic, Moncayo, Marco Antonio, Copyright, Copyright is held by the author, unless otherwise noted. All rights Reserved.

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