Densification of transparent yttrium aluminum garnet (YAG) by SPS processing

Densification of transparent yttrium aluminum garnet (YAG) by SPS processing

Nano-size YAG powder co-mixed with 0.25 wt.% LiF was used to fabricate transparent polycrystalline YAG specimens by means of the Spark Plasma Sintering (SPS) technique. The presence of the LiF additive in the initial nano-powder allows obtaining fully dense disc shaped (up to 4 mm thick) transparent...

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Bibliographic Details
Published in:Journal of the European Ceramic Society Vol. 30; no. 16; pp. 3331 - 3337
Main Authors: Frage, Naum, Kalabukhov, Sergey, Sverdlov, Nataliya, Ezersky, Vladimir, Dariel, Moshe P.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-12-2010
Subjects:
Carbon
Ceramics
Densification
Density
LiF additive
Nanocomposites
Nanomaterials
Nanostructure
Optical transparency
Spark plasma sintering
SPS
YAG
LiF additive
YAG
SPS
Optical transparency
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Summary:Nano-size YAG powder co-mixed with 0.25 wt.% LiF was used to fabricate transparent polycrystalline YAG specimens by means of the Spark Plasma Sintering (SPS) technique. The presence of the LiF additive in the initial nano-powder allows obtaining fully dense disc shaped (up to 4 mm thick) transparent specimens at the outcome of a 2 h treatment at 1300 °C. The presence of LiF plays a key role in the mass transport related effects during the densification of YAG to full density and also in the elimination of the residual carbon contamination, allowing reaching a level of optical transmittance close to the theoretical value.
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ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2010.08.006