abstract
MgO partially stabilized zirconia (xMgPSZ, with x = 3-14 mol% MgO) was prepared by a ceramic route, starting from pure metal oxides. 7.5MgPSZ, the focus of this work, was sintered at 1700 degrees C and cooled at various rates (1, 2 or 4 degrees C/min), without or with 1 or 2 intermediate dwells (1400, 1300, and 1000 degrees C), and dwell durations (1-6 h). Customized thermal expansion (TE) data analysis is used to estimate the monoclinic (M) phase content (with discrimination between large and small particles), while powder X-ray diffraction (XRD) provides an accurate cubic (C) phase assessment. With the tetragonal (T) phase content determined from balance to 100%, detailed sets of structural (M, C, T) and microstructural information (M particle size), are grouped in novel radar-type charts. Original benchmarking exercises using literature data on up thermal shock resistance and the charac-teristics of a commercial MgPSZ, provide unique insights on the thermal performance of these materials, and property tuning rationale.
keywords
PARTIALLY-STABILIZED ZIRCONIA; TRANSFORMATION BEHAVIOR; DILATOMETRIC BEHAVIOR; SINTERING TEMPERATURE; SOLID-ELECTROLYTE; TETRAGONAL PHASE; MG-PSZ; KINETICS; MORPHOLOGY; ALLOY
subject category
Materials Science
authors
Starykevich, M; Rondao, AIB; Grilo, JPF; Marques, FMB
our authors
Fernando Manuel Bico Marques
Full professor
João Grilo
Junior Researcher
Maksim Starykevich
Junior ResearcherProjects
Solucao de Engenharia Microestrutural para Aumentar o Transporte Ionico Interfacial (MERIT)
acknowledgements
This work was funded by projects MERIT (POCI-01-0145-FEDER028612) and CICECO-Aveiro Institute of Materials (UIDB/50011/2020 & UIDP/50011/2020), financed by national funds through FCT (Fundacao para a Ciencia e a Tecnologia)/MCTES, and by the Operational Program POCI, in its FEDER component.