Fracture toughness for copper oxide superconductors

Patent · 01 January 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
• 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

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