Retention of SiC during development of SiC-MxSiyOz composites [M = Al, Zr, Mg] by reaction bonding in air
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Retention of SiC during development of SiC-MxSiyOz composites [M = Al, Zr, Mg] by reaction bonding in air
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| Creator |
Samanta, A K
Dhargupta, K K Ghatak, S |
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| Subject |
Electronics
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| Description |
Oxidation of SiC is a major constraint during development of metal oxide-silicon carbide composites when processed in oxygen containing environment such as in air. In the present investigation, Mg+2, Al+3 and Zr+4 hydrogels were used as a source of respective oxide and oxidation of SiC in each system was studied. A three-stage mechanism was found to be operative in Al+3 and Zr+4 systems where oxidation at the initial stages was found to be controlled by the nature of the polynuclear complexes formed on the surfaces of SiC particles. At the intermediate stage a transition from polynuclear complex to metal silicate protective layer formation changes the oxidation characteristics. Finally the metal silicates provided the ultimate protection. Mg+2 was found to be ineffective. The extent of retention of SIC in the final composites could be premonitored by controlling the amount and the nature of complexing cations.
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| Publisher |
Elsevier Science
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| Date |
2000-11
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/655/1/ghatak.pdf
Samanta, A K and Dhargupta, K K and Ghatak, S (2000) Retention of SiC during development of SiC-MxSiyOz composites [M = Al, Zr, Mg] by reaction bonding in air. Journal of the European Ceramic Society , 20 (12). 1883 -1894 . ISSN 0955-2219 |
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| Relation |
http://cgcri.csircentral.net/655/
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