Phase Transformations in Dicalcium Silicate: III, Effects of Barium on the Stability of Fine‐Grained α′L and β Phases

Ian Nettleship, Kurt G. Slavick, Youn Joong Kim, Waltraud M Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

Fine‐grained materials containing both α′‐Ca2SiO4 and β‐Ca2SiO4 were fabricated as an analogue to tetragonal zir‐conia polycrystals (TZP) with the use of barium to stabilize the high‐temperature polymorphs of Ca2SiO4. The micro‐structure of dense α′L‐Ca2SiO4 exhibited none of the twinning or residual strain previously observed in fine‐grained β‐Ca2SiO4 and there was no evidence of barium‐rich grain boundary phases. Materials fired in the α region exhibited large grain sizes. Stress‐induced α′L→β transformation was observed on ground surfaces but not on fracture surfaces.

Original languageEnglish (US)
Pages (from-to)2628-2634
Number of pages7
JournalJournal of the American Ceramic Society
Volume76
Issue number10
DOIs
StatePublished - Oct 1993

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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