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Temporally evolved recoil pressure driven melt infiltration during laser surface modifications of porous alumina ceramic
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10.1063/1.2710288
/content/aip/journal/jap/101/5/10.1063/1.2710288
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/5/10.1063/1.2710288

Figures

Image of FIG. 1.
FIG. 1.

Physical model showing the interaction of laser beam with porous ceramic substrate during the laser surface modification. Various effects such as surface melting, evaporation, generation of evaporation recoil pressure, and melt infiltration are shown.

Image of FIG. 2.
FIG. 2.

Schematic of an integrative modeling method for predicting the overall depth of melting in laser surface modified alumina ceramic.

Image of FIG. 3.
FIG. 3.

Typical polished cross section of laser surface modified alumina ceramic mounted in epoxy mould. Surface modification was carried out at a laser fluence of .

Image of FIG. 4.
FIG. 4.

Computed temporal evolution of surface temperature during laser surface modifications of alumina ceramic processed with a range of laser fluence from .

Image of FIG. 5.
FIG. 5.

Computed variation of maximum surface temperature with laser processing fluence during the surface modifications of alumina ceramic.

Image of FIG. 6.
FIG. 6.

Computed temperature distribution below the surface of alumina ceramic surface modified with a range of laser processing fluence from .

Image of FIG. 7.
FIG. 7.

Computed temporal evolution of evaporation-induced recoil pressure during the laser surface modification of alumina ceramic processed with a laser processing fluence of .

Image of FIG. 8.
FIG. 8.

Computed evaporation-induced recoil pressure as a function of laser processing fluence employed during the laser surface modifications of alumina ceramic.

Image of FIG. 9.
FIG. 9.

High magnification SEM micrograph of the interfacial region of the laser surface modified alumina illustrating the infiltration of molten material into the underlying porous material assisted by evaporation-induced recoil pressures.

Image of FIG. 10.
FIG. 10.

Comparison of computed depth of melting from thermal and fluid flow model with experimental depth of melting (◆, Experimental; ∎, thermal model; and ▴, integrative thermal and fluid flow model).

Tables

Generic image for table
Table I.

Properties of alumina used in mathematical calculations.

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/content/aip/journal/jap/101/5/10.1063/1.2710288
2007-03-15
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Temporally evolved recoil pressure driven melt infiltration during laser surface modifications of porous alumina ceramic
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/5/10.1063/1.2710288
10.1063/1.2710288
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