Processing and Characterization of Al2O3-YAG Composite

E.S. Lima; Luis Henrique Leme Louro; José Brant de Campos; R.R. de Avillez; Sérgio Neves Monteiro; Célio Albano da Costa

doi:10.4028/www.scientific.net/MSF.727-728.1334

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Processing and Characterization of Al2O3-YAG...

Processing and Characterization of Al₂O₃-YAG Composite

Abstract:

Oxide ceramics show better oxidation resistance at high temperatures than other ceramics; however they are more susceptible to plastic deformation at elevated temperatures [. If their high temperature mechanical properties could be improved, they would be expected to open a wide range of applications as structural material [2, 3]. Several studies have revealed [4, 5] the potential use of YAG oxides as reinforcing component oxide in a ceramic matrix. Both YAG and Al₂O₃ have similar thermal expansion coefficient and they are chemically stable because of their low O₂vapor pressure. In addition, there is no solid state phase transition as the temperature rises, but the eutectic reaction at 1826°C with Al₂O₃ molar concentration of 81.5% and 18.5% for Y₂O₃ which enable a fusion processing, turning the Al₂O₃-YAG composites very attractive. This eutectic reaction is possible in the restrictive composition from 18.5 to 20.5 mol% Y₂O₃ [6].

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Periodical:

Materials Science Forum (Volumes 727-728)

Pages:

1334-1339

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.1334

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Online since:

August 2012

Authors:

E.S. Lima, Luis Henrique Leme Louro, José Brant de Campos, R.R. de Avillez, Sérgio Neves Monteiro, Célio Albano da Costa

Keywords:

Al₂O₃-YAG Composite, High-Energy Milling, Powder

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