On the atomic structure of the Nb/Al2 O3 interface and the growth of A12 O3 particles

M. Kuwabara, John Spence, M. Ruhle

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

The growth mechanism for small precipitates of A12 O3 formed by internal oxidation in the Nb-Al2 O3 interface is studied in detail. The observations show that the Nb (001)/A12 O3 (00.1) interface is almost atomically flat and that there are no interface compounds. We suggest that the final layer on the A12 O3 side of this interface consists of oxygen atoms. The effects of image forces on misfit dislocations are found to result in a standoff distance between dislocation cores and the interface, in good agreement with the recent theory. The implications of this for the strength of metal-ceramic bonding are discussed.

Original languageEnglish (US)
Pages (from-to)972-977
Number of pages6
JournalJournal of Materials Research
Volume4
Issue number4
DOIs
StatePublished - Aug 1989

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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