Residual stress and fracture of laminated ceramic membranes

Journal Article · Fri Feb 05 04:00:00 EST 1999 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00412-1· OSTI ID:329082

Atkinson, A; Selcuk, A ^[1]

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1. Imperial Coll., London (United Kingdom). Dept. of Materials

Bilayer laminated ceramic membranes were produced comprising a layer of gadolinia-doped ceria (CGO) 180 {micro}m thick and a layer of yttria-stabilized zirconia (YSZ) 5 {micro}m thick. The residual stresses in the laminates at room temperature were estimated from their curvature and the elastic constants of the individual layers. The fracture of the laminates was studied in biaxial flexure at 35 and 800 C. The mean failure stress in the CGO in the laminates was much greater than in unlaminated CGO. This is due partly to an improved microstructure from the lamination process and partly to the restraint of the compressively stressed YSZ. The combined effects of higher failure stress and residual stresses lead to the laminated membranes having higher apparent strength than single layer CGO membranes by factors of between 1.75 and 4.06.

• OSTI ID: 329082
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 3 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM OXIDES
COMPOSITE MATERIALS
FRACTURE PROPERTIES
GADOLINIUM OXIDES
INTERFACES
LAYERS
RESIDUAL STRESSES
TEMPERATURE DEPENDENCE
YTTRIUM OXIDES
ZIRCONIUM OXIDES