Isotropic complex oxides as fiber coatings for oxide-oxide CFCC

Richard W. Goettler*, Sankar Sambasivan, Vinayak P. Dravid

*Corresponding author for this work

Research output: Contribution to journalConference article

25 Scopus citations

Abstract

Classes of complex isotropic oxides consisting of tungstates, molybdates, tantalates and niobates with the general chemical formula ABO4 are being considered as fiber coatings for oxide-oxide continuous fiber reinforced ceramic composites (CFCC). Initial investigations were performed with scheelite (CaWO4) and erbium tantalate (ErTaO4) coatings on NextelTM 610 alumina fibers. Scheelite appears to show no reactivity with alumina at temperatures up to 1450 °C. The scheelite-alumina interface exhibits non-wetting characteristics and easy debonding. Unidirectional Nextel 610TM composites containing scheelite fiber coatings exhibited extensive fiber pullout. Preliminary results with ErTaO4 indicate a well bonded interface with alumina, however, detailed characterization of the interface is still pending.

Original languageEnglish (US)
Pages (from-to)279-286
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume18
Issue number3 A
StatePublished - Jan 1 1997
EventProceedings of the 1997 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures-B - Cocoa, FL, USA
Duration: Jan 12 1997Jan 16 1997

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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