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Oxidation behaviour of ZrB2–SiC (Al/Y) ceramics at 1700 °C.
- Source :
-
Journal of the European Ceramic Society . Nov2016, Vol. 36 Issue 15, p3769-3774. 6p. - Publication Year :
- 2016
-
Abstract
- ZrB 2 –SiC(Al/Y) ceramic composites were prepared by hot-pressing a mixture of ZrB 2 and polymer-derived SiC doped with either aluminium or yttrium (SiC(Al/Y)). The obtained composites were oxidized at 1700 °C in air. The weight change as a function of the oxidation time was measured to study the oxidation kinetics. It was found that the ZrB 2 –SiC(Al/Y) composites exhibited significantly improved oxidation resistance, as compared to the composite of ZrB 2 with un-doped SiC. The structure of the oxide resulted from the oxidation of the composites was characterized by scanning electron microscopy and X-ray diffraction. The results suggested that the improvement can be attributed to the formation of yttrium/aluminium-doped silica and/or yttrium disilicate, which effectively protect the composites. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 36
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 117118079
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2016.02.037