On the Microstructures Resulting from the Diffusionless Cubic→Tetragonal Transformation in ZrO2-Y2O3 Alloys

Authors

  • V. Lanteri,

    1. Department of Metallurgy and Materials Science, Case Western Reserve University, Cleveland, Ohio 44106
    Search for more papers by this author
    • Member, the American Ceramic Society.

  • R. Chaim,

    1. Department of Metallurgy and Materials Science, Case Western Reserve University, Cleveland, Ohio 44106
    Search for more papers by this author
    • Member, the American Ceramic Society.

  • A. H. Heuer

    1. Department of Metallurgy and Materials Science, Case Western Reserve University, Cleveland, Ohio 44106
    Search for more papers by this author
    • Member, the American Ceramic Society.


  • Contributing Editor—A. G. Evans

  • Supported by the Department of Energy under Contract No. DEFG0284ER45110.

Abstract

A diffusionless cubic (c)→metastable tetragonal (t′) phase transformation occurs in certain alloys in the ZrO2-Y2O3 system on quenching from elevated temperatures. Microstructural features due to this phase transformation, principally anti-phase domain boundaries (APB's) and mechanical accommodation twins, have been characterized using transmission electron microscopy. Certain differences between our interpretation and those of other workers are discussed.

Ancillary