Dilatometric inspection of phase changes in Mg-PSZ

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abstract

Partially Stabilized Zirconia samples with 7, 8 and 9 mol% MgO (Mg PSZ) were sintered at 1700 degrees C for 2 h and cooled to room temperature (2 degrees C.min(-1)), to obtain distinct phase compositions and microstructures. These materials were studied by dilatometry (DIL) up to about 1500 degrees C (heating rate of 10 degrees C.min(-1)). A detailed analysis of DIL curves is used to estimate the initial M (monoclinic) phase content and quantify the progressive conversion M -> T (tetragonal) as a function of temperature. Microstructures observed by scanning electron mi- croscopy and phase content estimates from X-ray diffraction (XRD) patterns of sintered samples and milled powders, are used to show the consistency of the DIL data analysis. Furthermore, combination of room temperature XRD and DIL data yields unique and comprehensive details on the microstructural and phase content changes with temperature (all phases, M, T and C-cubic), hardly obtained in any other manner.

keywords

PARTIALLY-STABILIZED ZIRCONIA; TETRAGONAL PHASE; TRANSFORMATION; KINETICS; TEMPERATURE; BEHAVIOR; MORPHOLOGY; STEEL; ZRO2

subject category

Thermodynamics; Chemistry

authors

Rondao, AIB; Grilo, JPF; Starykevich, M; Marques, FMB

our authors

foto Ana Inês Batista Lourenço Rondão

Ana Inês Batista Lourenço Rondão

Post-Doc Fellowship
foto Fernando Manuel Bico Marques

Fernando Manuel Bico Marques

Full professor
foto João Grilo

João Grilo

Junior Researcher
foto Maksim Starykevich

Maksim Starykevich

Junior Researcher

Groups

G3 - Electrochemical Materials, Interfaces and Coatings

Projects

Solucao de Engenharia Microestrutural para Aumentar o Transporte Ionico Interfacial (MERIT)

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

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.

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Publication Details

type
Journal Article
year
2022
journal
THERMOCHIMICA ACTA
volume
709
article number
179147
publisher
ELSEVIER
issn
0040-6031
digital object identifier
10.1016/j.tca.2022.179147
web of science article identifier
WOS:000754010500001

Journal Metrics (JCR 2019)

Journal Impact Factor
2.762
Journal Impact Factor (5 yrs)
2.688
category normalized journal percentile
59.299

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