An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Strength Limiting Surface Damage in Single-Crystal Sapphire Imaged by X-Ray Topography
Published
Author(s)
David R. Black
Abstract
X-ray diffraction topography has been used to investigate the relationship between sub-surface damage and fracture strength in sapphire modulus of rupture (MOR) bars. The bars were indistinguishable using standard optical characterization techniques, but x-ray diffraction topography revealed that they were of two distinct types. The first type had an oriented microstructure consisting of a pattern of linear features running the length of the bars. This microstructure was attributed to fabrication damage. The second type was typical of well-polished, damage-free sapphire. Fracture strength data showed that the damaged bars had strengths less than 70 % of the bars without damage.
Black, D.
(2001),
Strength Limiting Surface Damage in Single-Crystal Sapphire Imaged by X-Ray Topography, Journal of the American Ceramic Society
(Accessed April 25, 2024)