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Title

Is an alumina-whisker-reinforced alumina composite the most efficient choice for an oxidation-resistant high-temperature ceramic?

AuthorsTamura, Yoshihiro; Moshtaghioun, Bibi Malmal; Zapata-Solvas, E. ; Gómez-García, D. ; Domínguez-Rodríguez, Arturo; Cerecedo-Fernández, Carmen; Valcárcel-Juárez, Víctor
KeywordsAl2O3
Whisker
Composite
High-temperature deformation
Issue DateApr-2018
PublisherElsevier
CitationJournal of the European Ceramic Society 38(4): 1812-1818 (2018)
AbstractThe search of a competitive ceramic material for structural applications demands several requisites: a simple microstructure with easy reproducibility, good intrinsic mechanical properties and most of all, an optimal oxidation resistance. This later point is a challenging point for most ultrahigh refractory materials. In this work an alumina (AlO) whisker-reinforced AlO composite prepared by spark plasma sintering (SPS) is studied. It will be shown that, although the microstructure is quite similar to that of pure monolithic one, there is a notorious enhancement of the high-temperature deformation resistance, reaching up to one order of magnitude over the pure AlO specimen. On the other hand, the activation energy of these composites increases notably. The results are explained in terms of an original model. A comparison with reported data shows that such composite is as efficient as a SiC-whisker-reinforced AlO composite, with the advantage of its oxidation resistance and much less fabrication cost.
Publisher version (URL)https://doi.org/10.1016/j.jeurceramsoc.2017.10.006
URIhttp://hdl.handle.net/10261/194105
DOI10.1016/j.jeurceramsoc.2017.10.006
ISSN0955-2219
Appears in Collections:(ICMS) Artículos
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