MoSi2/Al2O3 FGM: elaboration by tape casting and SHS

MoSi2/Al2O3 functionally graded materials (FGM) with alumina varying from 20 to 80 mol% were fabricated using a combination of tape casting and SHS. Tape casting was used to prepare tapes of different compositions. Square units cut out of tapes with different compositions were stacked in a variety o...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2001-11, Vol.21 (13), p.2353-2360
Main Authors: DUMONT, Anne-Laure, BONNET, Jean-Pierre, CHARTIER, Thierry, FERREIRA, José M. F
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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Summary:MoSi2/Al2O3 functionally graded materials (FGM) with alumina varying from 20 to 80 mol% were fabricated using a combination of tape casting and SHS. Tape casting was used to prepare tapes of different compositions. Square units cut out of tapes with different compositions were stacked in a variety of sequences. After debinding, the green samples were ignited at room temperature. The combustion reactions were conducted under a weak load to enhance the densification of the composition-graded composites. The variation of porosity as a function of the applied pressure and of the thickness of the layers was investigated. The electrical resistivity of the as-obtained FGM varies by more than 10 orders of magnitude across the composite. 23 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(01)00198-4