Fracture toughness measurements of YBa/sub 2/Cu/sub 3/O/sub x/ single crystals
Journal Article
·
· Appl. Phys. Lett.; (United States)
We report fracture toughness measurements on single crystals of YBa/sub 2/Cu/sub 3/O/sub x/, the phase responsible for superconductivity above liquid-nitrogen temperatures. Indentation crack length measurements on the (010) orthorhombic crystal growth faces revealed the (100) and (001) planes as preferred fracture planes. The toughness of these planes is K/sub c/ = 1.1 +- 0.3 MPa m/sup 1//sup ///sup 2/, and the hardness H = 8.7 +- 2.4 GPa. The observed growth of both radial and lateral cracks in ambient air suggests that these crystals are susceptible to moisture-enhanced nonequilibrium crack propagation.
- Research Organization:
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598
- OSTI ID:
- 6419844
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 51:6; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BRITTLENESS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRACKS
CRYSTALS
DATA
EXPERIMENTAL DATA
FAILURES
FRACTURES
HARDNESS
INFORMATION
MECHANICAL PROPERTIES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BRITTLENESS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRACKS
CRYSTALS
DATA
EXPERIMENTAL DATA
FAILURES
FRACTURES
HARDNESS
INFORMATION
MECHANICAL PROPERTIES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES