Defects formation in YSZ ceramics with different Y2O3 content irradiated with 0.25 MeV electrons energy. (December 2021)

• Record Type: Journal Article
• Authors: Stepanov, S.; Khasanov, O.; Dvilis, E.; Paygin, V.; Valiev, D.
• Is Part Of: Radiation physics and chemistry. Volume 189(2021)
• Publication Date: 2021-12
• Subjects: Yttrium-stabilized zirconia (YSZ) ceramics -- Electron beam irradiation -- Radiation-induced defects -- Optical properties; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2021.109736
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: This work aims to study the effect of electron irradiation and Y2 O3 content on the optical and luminescent properties of translucent cubic yttrium-stabilized zirconia (YSZ) ceramics fabricated by free sintering technique. Commercial nanopowders TZ-8YS and TZ-10YS TOSOH were used for sintering ceramics. It was shown that irradiation leads to the formation of centers of induced absorption, which are deconvoluted by the set of three Gaussian bands with maxima at 2.9, 2.5, and 2.1 eV, respectively. An increase in the Y2 O3 content from 8 mol.% to 10 mol.% significantly affect the formation of induced absorption centers. The cathodoluminescence (CL) spectrum can be satisfactorily approximated by the sum of three Gaussian bands (2.8, 2.28 and 2.04 eV). The CL intensity band at 2.8 eV (F + -center) growth when the Y2 O3 content leads to an increase. Highlights: Cubic yttriа stabilized zirconia ceramics have been fabricated by free sintering technique. The defect formation process under pulse e-beam excitation was investigated in YSZ ceramics. The role of Y2 O3 on the induced absorption and cathodoluminescent properties of YSZ ceramics was demonstrated. Assumptions are made about the nature of absorption and cathodoluminescence centers.