The effect of non-stoichiometry on microstructure and selected properties of YAG polycrystals

The effect of non-stoichiometry on microstructure and selected properties of YAG polycrystals

Using modified citrate process three materials were prepared: the one of stoichiometric Al/Y ratio corresponding to YAG composition, another one with aluminum deficit and the third one containing surplus amount of aluminum. Typical microstructure of single-phase body reveals stoichiometric material....

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Veröffentlicht in:Ceramics international 2012-04, Vol.38 (3), p.2589-2592
Hauptverfasser: Zarzecka-Napierała, Magdalena, Bućko, Mirosław M., Haberko, Krzysztof
Format: Artikel
Sprache:eng
Schlagworte:
Aluminium
Aluminum
Ceramics
Inclusions
Materials selection
Microstructure
Non-stoichiometry
Stoichiometry
YAG
YAG polycrystals
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Beschreibung
Zusammenfassung:Using modified citrate process three materials were prepared: the one of stoichiometric Al/Y ratio corresponding to YAG composition, another one with aluminum deficit and the third one containing surplus amount of aluminum. Typical microstructure of single-phase body reveals stoichiometric material. The one of aluminum deficit shows YAP inter-crystalline inclusions. Material of Al/Y ratio higher than the YAG stoichiometry shows inter/intra α-Al2O3 inclusions. Stoichiometry of the system influences mechanical properties of the material.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.10.027