The resistance to oxidation of an HfB2-SiC composite (Articolo in rivista)

Type
Label
  • The resistance to oxidation of an HfB2-SiC composite (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jeurceramsoc.2004.05.009 (literal)
Alternative label
  • Frederic Monteverde; Alida Bellosi; (2005)
    The resistance to oxidation of an HfB2-SiC composite
    in Journal of the European Ceramic Society
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Frederic Monteverde; Alida Bellosi; (literal)
Pagina inizio
  • 1025 (literal)
Pagina fine
  • 1031 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0955221904002328 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 25 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Institute of Science and Technology for Ceramics, National Research Council, Via Granarolo 64, 48018 Faenza, Italy (literal)
Titolo
  • The resistance to oxidation of an HfB2-SiC composite (literal)
Abstract
  • The oxidation resistance of an hot-pressed HfB2-–SiC composite was studied through non-isothermal and isothermal treatments at temperatures up to 1600°C in air. The most severe oxidation conditions consisted of repeated heating-cooling cycles at 1600°C for up to 80 min of exposure. A thermogravimetric test for over 20 h at 1450°C provided evidence that, at this temperature, the oxidation kinetics fits a paralinear law until 10 h, when a partial rupture of external oxide scale occurs (i.e. a break-away reaction). Afterwards, the weight gain data fit a linear law. The main secondary phases formed in the composite during hot-pressing, namely BN, Hf(C,N) and a Si-based compound, although in limited amounts, influenced the oxidation resistance at temperatures below 1350°C. At temperatures higher than about 1400°C, the presence of SiC particles markedly improved the oxidation resistance due to the formation of a protective borosilicate glassy coating on the exposed surfaces. (literal)
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