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Colour centre production in yttria-stabilized zirconia by X-ray and electron irradiations: effect of yttria content

Costantini, Jean-Marc ; Fasoli, Mauro ; Beuneu, François ; Boizot, Bruno

Philosophical magazine (Abingdon, England), 2014-12, Vol.94 (35), p.4053-4065 [Periódico revisado por pares]

Abingdon: Taylor & Francis

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Título:
Colour centre production in yttria-stabilized zirconia by X-ray and electron irradiations: effect of yttria content
Autor: Costantini, Jean-Marc ; Fasoli, Mauro ; Beuneu, François ; Boizot, Bruno
Assuntos: 61.72.Cc ; 61.80.-x ; 76.30.Mi ; 78.40.-q ; Chemical Sciences ; colour centres ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Crystal defects ; Crystalline state (including molecular motions in solids) ; Decay rate ; electron irradiation ; electron paramagnetic spectroscopy ; Electrons and positron radiation effects ; Exact sciences and technology ; Irradiation ; Material chemistry ; Materials science ; Mathematical models ; Methods of crystal growth; physics of crystal growth ; optical absorption spectroscopy ; Physical radiation effects, radiation damage ; Physics ; Solid solution, precipitation, and dispersion hardening; aging ; Spectroscopy ; Structure of solids and liquids; crystallography ; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation ; Theory of crystal structure, crystal symmetry; calculations and modeling ; Treatment of materials and its effects on microstructure and properties ; X-ray irradiation ; X-rays ; Yttria stabilized zirconia ; Yttrium oxide
É parte de: Philosophical magazine (Abingdon, England), 2014-12, Vol.94 (35), p.4053-4065
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Yttria-stabilized zirconia (YSZ) single crystals (for 9.5 and 18 mol% yttria) were irradiated at room temperature (RT) by X-rays (W white spectrum) and 2.5-MeV electrons. The growth curves of the so-called T-centre (for trigonal centre, i.e. Zr 3+ sitting in a trigonal symmetry site) were studied as a function of absorbed dose, or irradiation time, by UV-visible optical absorption (OA) spectroscopy and X-band electron paramagnetic resonance spectroscopy. The defect concentration at saturation and the production rate are increased by a factor around two for 18 mol% yttria with respect to 9.5 mol%. Defect decay was then followed after irradiation by OA spectroscopy as a function of ageing time at RT. Growth and decay curves of the T-centre are modelled on the basis of rate equations of charge-exchange reactions with the zirconium lattice ions. Increase in yttrium content is thought to decrease hole trapping on Zr 3+ ions, thereby enhancing T-centre formation.
Editor: Abingdon: Taylor & Francis
Idioma: Inglês

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Colour centre production in yttria-stabilized zirconia by X-ray and electron irradiations: effect of yttria content

Costantini, Jean-Marc ; Fasoli, Mauro ; Beuneu, François ; Boizot, Bruno

Abingdon: Taylor & Francis

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