Reactive Spark Plasma Sintering of AlON Ceramics

In this study, aluminum oxynitride ceramics (AlON) with using AlN and Al2O3 starting powders were prepared by Spark Plasma Sintering (SPS) under nitrogen atmosphere. AlN and Al2O3 mixtures with sintering additives (Mg, La) were prepared. Several mixtures of Al2O3 and AlN were ball milled with alumin...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Esra Kanbur, Halide, Apak, Burcu, Goller, Gultekin, Yucel, Onuralp, Cinar Sahin, Filiz
Format: Article
Language:English
Subjects:
Aluminum nitride
Aluminum oxide
Atmospheres
Ceramics
Microstructure
Sintering
Sintering (powder metallurgy)
Spark plasma sintering
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Summary:In this study, aluminum oxynitride ceramics (AlON) with using AlN and Al2O3 starting powders were prepared by Spark Plasma Sintering (SPS) under nitrogen atmosphere. AlN and Al2O3 mixtures with sintering additives (Mg, La) were prepared. Several mixtures of Al2O3 and AlN were ball milled with alumina balls for 24 h. The obtained powder mixtures were sintered at several temperatures and periods at 40 MPa under nitrogen atmosphere by SPS system. The phase compositions of the samples were examined by X-ray diffraction (XRD) and microstructures were observed by SEM technique. The hardness and fracture toughness of the sintered samples were measured. The effects of SPS temperature, heating rate, soaking time and sintering additives on phase transformation, microstructure, mechanical properties, density and transparency of AlON were investigated.
ISSN:0094-243X