Accession Number:

ADA238756

Title:

Creep of Oxide Single Crystals

Descriptive Note:

Final rept. Sep 87-Sep 89,

Corporate Author:

GE CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY NY

Personal Author(s):

Report Date:

1990-08-01

Pagination or Media Count:

98.0

Abstract:

The constant-load compressive creep behavior of single crystals of yttria-stabilized zirconia, thoria, yttrium-aluminum garnet, beryllia, alumina and silicon carbide were determined. Of the materials tested, yttrium-aluminum garnet was judged to be the best candidate for reinforcement fiber development due to its good creep resistance, low anisotropy and inherent oxidation resistance. C-axis aligned beryllia is also expected to have very good creep resistance however, severe creep anisotropy caused by easy basal slip may limit its usefulness as a reinforcement. Data from this study and from the literature suggests that the creep resistance of cubic oxide single crystals improves as the size of the glissile dislocation Burgers vector increases.

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE