Laser Modified Alumina: a Computational and Experimental Analysis

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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 ... continued below

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Moncayo, Marco Antonio December 2012.

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  • Moncayo, Marco Antonio

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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.

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  • December 2012

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  • Aug. 13, 2013, 2:47 p.m.

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  • Nov. 16, 2016, 5:26 p.m.

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Moncayo, Marco Antonio. Laser Modified Alumina: a Computational and Experimental Analysis, thesis, December 2012; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc177232/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .