Fracture characteristics of Czochralski-grown Y3Al5O12
- 1. Colorado School of Mines, Golden, CO (United States). Dept. of Metallurgical and Materials Engineering
- 2. Los Alamos National Lab., NM (United States). Materials Science and Technology Division
Description
The fracture surfaces of single-crystal Y3al5O12 (YAG) have been examined in detail using differential interference microscopy and atomic force microscopy. In YAG crystals grown in 1977 by the Czochralski method strikingly regular undulations of microscopic and submicroscopic dimensions (4--20 nm in amplitude, 1--20 microm in wavelength) are observed on every fracture surface. The undulations do not exhibit typical characteristics of Wallner lines; furthermore, they are not observed in identical fracture tests for YAG crystals grown in 1990 by the Czochralski method. Transmission electron microscopy reveals that the crystals grown in 1977 exhibit a periodic fluctuation of the ratio of the concentrations of aluminum to yttrium, suggesting that the fracture surface features are caused by periodic astoichiometry
Additional details
Publishing Information
- Journal Title
- Journal of the American Ceramic Society
- Journal Volume
- 78
- Journal Issue
- 8
- Journal Page Range
- p. 2282-2286.
- ISSN
- 0002-7820
- CODEN
- JACTAW
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 27013475
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM OXIDES; CHEMICAL COMPOSITION; FLEXURAL STRENGTH; FRACTURE PROPERTIES; MONOCRYSTALS; SAMPLE PREPARATION; STRIATIONS; TOPOLOGY; TRANSMISSION ELECTRON MICROSCOPY; YTTRIUM OXIDES
- Descriptors DEC
- ALUMINIUM COMPOUNDS; CHALCOGENIDES; CRYSTALS; ELECTRON MICROSCOPY; MATHEMATICS; MECHANICAL PROPERTIES; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS