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Vol. 2. Num. 1.January - March 2013
Pages 1-86
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Vol. 2. Num. 1.January - March 2013
Pages 1-86
Original Article
DOI: 10.1016/j.jmrt.2013.03.005
Processing and characterization of Al2O3-yttrium aluminum garnet powders
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Eduardo de Souza Limaa,
Corresponding author
eslima@hotmail.com

Corresponding author.
, Luis Henrique Leme Louroa, Ricardo de Freitas Cabralb, José B. de Camposc, Roberto Ribeiro de Avillezd, Célio Albano da Costae
a Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ, Brazil
b Universidade Estadual da Zona Oeste (UEZO), Rio de Janeiro, RJ, Brazil
c Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
d Materials Engineering Department, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio/DEMa), Rio de Janeiro, RJ, Brazil
e Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia, Universidade Federal do Rio de Janeiro (COPPE/UFRJ), Rio de Janeiro, RJ, Brazil
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Abstract

Recent studies have shown that Y3Al5O12 (YAG - yttrium aluminum garnet) and Al2O3 composites are chemically stable at high temperatures when produced by unidirectional solidification. In this method, the material is slowly solidified immediately after passing through a melting zone. However, this complexity procession has encouraged other routes. Among them, the usual sintering of Al2O3 and Y2O3 (or YAG) powders. In this present work, Al2O3 and YAG powders were produced using a high-energy milling of Al2O3 and Y2O3 precursor powders followed by a thermal treatment step. These powders were characterized using quantitative XRD techniques, BET, SEM and TEM. The complete YAG formation was obtained at 1,400°C.

Keywords:
Al2O3-yttrium aluminum garnet
Composite
Milling
Powders
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Copyright © 2013. Brazilian Metallurgical, Materials and Mining Association
Journal of Materials Research and Technology

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