abstract
MgO-doped partially stabilized zirconia (MgPSZ) is a ceramic where three phases (cubic, tetragonal and monoclinic zirconia) might coexist due to non-equilibrium conditions and proper quantification of phase content is difficult. Here, a few selected compositions (in the 7-10 mol% MgO range) and firing profiles were studied in order to cover several phase compositions and microstructural features. An original attempt is made to correlate data obtained by X-ray diffraction (XRD), dilatometry (DIL) and scanning electron microscopy (SEM). Distinct software packages used in the analysis of XRD patterns of different samples confirmed the shortcomings of the assessment of phase content in sintered bodies while proper handling of DIL data provided complementary quantitative information on their phase content. The suggested procedure can be further used to obtain a subtle insight on phase development with temperature, subject of major relevance with respect to tuning of the mechano-thermal behavior of these ceramics.
keywords
PARTIALLY-STABILIZED ZIRCONIA; MG-PSZ; THERMAL-EXPANSION; SHOCK RESISTANCE; TETRAGONAL PHASE; ZRO2-MGO SYSTEM; TRANSFORMATION; KINETICS; BEHAVIOR; STEEL
subject category
Materials Science
authors
Rondao, AIB; Soares, MR; Tobaldi, DM; Ferreira, A; Labrincha, JA; Marques, FMB
our authors
Ana Inês Batista Lourenço Rondão
Post-Doc Fellowship
Artur Jorge Faria Ferreira
Professor Coordinator
David Maria Tobaldi
Researcher
Fernando Manuel Bico Marques
Full professor
João António Labrincha Batista
Associate Professor with Aggregation
Maria do Rosário Teixeira Soares
Senior TechnicianGroups
1 - Inorganic Functional Nanomaterials and Organic-Inorganic Hybrids
3 - Carbon Materials, Composites and Functional Coatings
4 - Biorefineries, Biobased Materials and Recycling
acknowledgements
This work was funded by CICECO - Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. A research grant from FCT, Portugal (A. Rondao, SFRH/BDE/52139/2013) is also highly appreciated.