Surface modification and characterization of functional oxide ceramics using CO2 laser

Okutomi, Mamoru; Nomura, Haruhiko; Tsukamoto, T.; Dahotre, N.B.; Shen, Honglie

doi:10.1016/s0168-583x(00)00008-2

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…This technique can be used to generate high-quality productive electronic ceramics. 7 Laser irradiation of ZrO 2 ceramic significantly modifies its surface and produces good adherence of metal deposits onto the ceramic surface. 9 Alumina ceramic possesses outstanding thermal and mechanical properties, which make it a preferred material for use in structural components that require minimum porosity.…”

Section: The Laser Surface Modification Of Advanced Ceramics: a Modelmentioning

confidence: 99%

The laser surface modification of advanced ceramics: A modeling approach

Samant

Harimkar

Dahotre

2007

JOM

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A numerical approach for predicting microstructures during the laser surface modification of ceramics has been proposed. Laser surface modification is a near-non-equilibrium or non-equilibrium process involving high cooling rates (10 2 -10 8 K/s) leading to rapid solidification. As the basic governing solidification theory behind conventional processes like casting and laser processing is the same, the approach and the theory behind the conventional processes can be extended to such near-non-equilibrium processes by adequately modifying the conventional models. This study looks at various challenges in modeling the laser processing phenomena and elaborates on present efforts and future modeling goals.

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Section: The Laser Surface Modification Of Advanced Ceramics: a Modelmentioning

confidence: 99%

The laser surface modification of advanced ceramics: A modeling approach

Samant

Harimkar

Dahotre

2007

JOM

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show abstract

“…[13][14][15][16][17] Surface treatment of ceramics by laser scanning is processed instantaneously via sequential thermal processes such as heating, melting, and molten zone solidification during rapid cooling. 18 Under such thermal conditions, the particles on the surfaces of ceramics are expected to experience nonequilibrium state and, therefore, can acquire totally different surface microstructure by controlling the laser-scanning parameters. In this paper, a novel process was developed to prepare alumina platelets by laser scanning an alumina powder bed.…”

Section: Introductionmentioning

confidence: 99%

Preparation of α‐Alumina Platelets by Laser Scanning

Choy

Hench

2004

Journal of the American Ceramic Society

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A laser scanning with gas jet process was developed to prepare alumina platelets from an alumina powder. When the carbondioxide laser scanned the alumina powdery coatings prepared using an electrospraying technique, the alumina particles were heated to a melting state. The coaxial gas ejection force pushed the melting particles to obtain tabular shape grains that recrystallized into alumina platelets in the subsequent rapidcool solidification. The phase and morphologies of powder bed were characterized by XRD and SEM. Results show that only ␣-alumina platelets were formed in the scanning process and the average edge length and thickness is 10 m and 1-2 m, respectively. Laser processing parameters such as laser energy density, scanning speed, and gas pressure were expected to play a vital role in the melting-crystallization-solidification process for obtaining platelike grains from powder beds. The preliminary experiment showed that the laser-scanning technique could be an effective means of tailoring the morphologies of particles to meet application requirements.

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Effect of laser irradiation on activation energy, irreversibility field and upper critical magnetic field of bulk MgB2 superconductor

Erdem

Yanmaz

2016

J Mater Sci: Mater Electron

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Surface modification and characterization of functional oxide ceramics using CO2 laser

Cited by 9 publications

References 8 publications

The laser surface modification of advanced ceramics: A modeling approach

The laser surface modification of advanced ceramics: A modeling approach

Preparation of α‐Alumina Platelets by Laser Scanning

Effect of laser irradiation on activation energy, irreversibility field and upper critical magnetic field of bulk MgB2 superconductor

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