Phase structure and thermal evolution in coatings and powders obtained by sol-gel process: Part I. ZrO{sub 2}{endash}11.3 mol {percent} Y{sub 2}O{sub 3}

Journal Article · Fri Jan 31 23:00:00 EST 1997 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1997.0071· OSTI ID:467276

Rivas, P C; Caracoche, M C; Martinez, J A; Rodriguez, A M ^[1]; Caruso, R; Pellegri, N; de Sanctis, O ^[2]

---

1. Programa TENAES, Departamento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, c.c. 67, 1900 La Plata (Argentina)
2. Laboratorio de Materiales Ceramicos, FCEIyA-UNR, IFIR, Av. Pellegrini 250, 2000 Rosario (Argentina)

Yttria-stabilized cubic zirconia powders and coatings produced by the sol-gel method have been investigated by Perturbed Angular Correlation Spectroscopy (PAC). Results indicate that the metastable cubic phase is retained during heating and cooling cycles. The hyperfine interaction that describes this cubic phase, once crystallized, exhibits two components in a constant ratio of 4:1. The components represent different vacancy configurations. For the fast movement of oxygen vacancies starting at 750{degree}C, which is reflected by the damping of the hyperfine pattern, an activation energy of 0.96 eV was determined. {copyright} {ital 1997 Materials Research Society.}

• OSTI ID: 467276
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 2 Vol. 12; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
COATINGS
COOLING
HEAT TREATMENTS
OXYGEN
PHASE STUDIES
POWDERS
SOL-GEL PROCESS
VACANCIES
YTTRIUM OXIDES
ZIRCONIUM OXIDES