Improved fracture toughness for copper oxide superconductors

Patent Application · Tue Dec 31 00:00:00 EST 1991

OSTI ID:140148

Goretta, K C; Kullberg, M L

An oxide-based strengthening and toughening agent, such as tetragonal Zro{sub 2} particles, has been added to copper oxide superconductors, such as superconducting YBa{sub 2}Cu{sub 3}O{sub x} (123) to improve it fracture toughness (K{sub IC}). A sol-gel coating which is non-reactive with the superconductor, such as Y{sub 2}BaCuO{sub 5} (211) on the ZrO{sub 2} particles minimized the deleterious reactions between the superconductor and the toughening agent dispersed therethrough. Addition of 20 mole percent ZrO{sub 2} coated with 211 yielded a 123 composite with a K{sub IC} of 4.5 MPa(m){sup 0.5}.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7761551
• Application Number: ON: DE94003058; PAN: 7-761,551
• OSTI ID: 140148
• Resource Relation: Other Information: PBD: 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
HIGH-TC SUPERCONDUCTORS
FRACTURE PROPERTIES
DISPERSION HARDENING
ZIRCONIUM OXIDES
YTTRIUM OXIDES
BARIUM OXIDES
COPPER OXIDES
PARTICLES
ADDITIVES
WHISKERS
FIBERS
TETRAGONAL LATTICES
COATINGS