Fracture toughness for copper oxide superconductors

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:868742

Goretta, Kenneth C ^[1]; Kullberg, Marc L ^[2]

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1. Downers Grove, IL
2. Lisle, IL

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 its 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 Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5202306
• OSTI ID: 868742
• Country of Publication: United States
• Language: English

Related Subjects

fracture
toughness
copper
oxide
superconductors
oxide-based
strengthening
toughening
agent
tetragonal
zro
particles
added
superconducting
yba
cu
123
improve
sol-gel
coating
non-reactive
superconductor
bacuo
211
minimized
deleterious
reactions
dispersed
therethrough
addition
20
mole
percent
coated
yielded
composite
mpa
oxide superconductors
sol-gel coating
copper oxide
fracture toughness
mole percent
oxide superconductor
superconducting yba
toughening agent
tetragonal zro
/505/252/501/