LOW COST PROCESSING OPTIONS FOR CA-α-SIALONS

The aim of this work is to investigate the potential for lower cost production of Ca-α-SiAlON materials. In order to reduce the costs typically associated with the production of these materials, we have investigated Reaction Bonding (RB) as an alternative processing route, as well as alternative raw...

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Bibliographic Details
Published in:International journal of modern physics. Conference series 2012, Vol.6, p.31-36
Main Authors: JONES, MARK IAN, LAWRIE, KATARINA, KUGLER, KURT
Format: Article
Language:English
Subjects:
Electronic and Optical Materials (Room A)
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Summary:The aim of this work is to investigate the potential for lower cost production of Ca-α-SiAlON materials. In order to reduce the costs typically associated with the production of these materials, we have investigated Reaction Bonding (RB) as an alternative processing route, as well as alternative raw materials for the source of calcium by recycling waste mussel shells from the New Zealand aquaculture industry. Full transformation to Ca-α-SiAlON was achieved at 1400°C in the reaction bonded materials, whereas the conventional silicon nitride based materials required temperatures of 1800°C to achieve full transformation. The relative density of the sintered samples was low but, as a production route for SiALON powders or for materials for low tech applications, the reaction bonding / mussel shell combination offers significant cost benefits.
ISSN:2010-1945
2010-1945
DOI:10.1142/S2010194512002899