Non-Basal Slip in Alumina at High Temperatures and Pressures.
Abstract
A zero degree Czochralski sapphire has been deformed in tensile creep at 1600-1800C, and fine-grained alumina polycrystals have been deformed under hydrostatic confining pressures at 1000-1200C, in order to activate non-basal slip. Deformation in both cases is thought to have involved pyramidal slip (((-1)102) plane). Activation of this slip system, together with basal and prismatic plane slip, allows the von Mises criterion to be satisfied. In addition, 'water weakening' was observed to occur in the deformation of polycrystalline alumina under hydrostatic confining pressures. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1970
- Accession Number
- AD0716788
Entities
People
- A. H. Heuer
- J. D. Snow
- J. Tullis
- R. F. Firestone
Organizations
- Case Western Reserve University