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Annealing aged zirconia: Study of surface mechanical properties at the micrometric length scale
Roa Rovira, Joan Josep; Anglada Gomila, Marcos Juan
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural i Fiabilitat dels Materials
The annealing of hydrothermal aged zirconia has been studied by analysing the changes in microstructure and surface mechanical properties in terms of the annealing temperature. In this experimental work, a systematic micro- and nanomechanical study has been conducted in 3 mol% yttria-stabilized tetragonal polycrystalline zirconia (3Y-TZP) aged at 134 degrees C for 60 h and annealed at 600 degrees C and 850 degrees C for 1 h. Advance characterization techniques (micro-Raman, field emission scanning electron microscopy and focused ion beam) have been used to study the near surface microstructural changes induced by these treatments. The mechanical properties and resistance to damage of the near surface are determined by means of nanoindentation and nanoscratch testing. The observed behaviour is discussed in terms of the change in microstructure induced after ageing and annealing. (C) 2014 Elsevier Ltd. All rights reserved.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials
Zirconium
Materials--Mechanical properties
3Y-TZP
Monoclinic to tetragonal phase transformation
Annealing treatment
Indentation hardness and indentation elastic modulus
Scratch resistance
LOW-TEMPERATURE DEGRADATION
TETRAGONAL ZIRCONIA
FRACTURE-TOUGHNESS
ELASTIC-MODULUS
Y-TZP
TRANSFORMATION
CERAMICS
NANOINDENTATION
INDENTATION
HARDNESS
Zirconi -- Propietats mecàniques
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
Artículo
Elsevier
         

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