Thermal annealing of neutron irradiation generated paramagnetic defects in transparent Al2O3 ceramics

Antuzevičš, Andris; Elsts, E.; Ķemere, Meldra; Lushchik, A.; Moskina, Aleksandra; Scherer, T.; Попов, А. И.

doi:10.1016/j.optmat.2022.113250

Cited by 4 publications

(1 citation statement)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the elastic mismatch between the various layers and the zirconia phase transition on the Al 2 O 3 -30%mZrO 2 layer, the results demonstrate that the residual stress distribution curve in the laminate determines the material’s thermal shock response. Al 2 O 3 and ZrO 2 ceramic materials have good high radiation and heat resistance [ 10 , 11 ], and have good application prospects in future fusion energy. Vandeperre [ 12 ] compared and analyzed the thermal shock of composite and layered ceramic materials at different temperatures and materials through experiments, revealing the phenomenon that crack deflection prevents crack penetration.…”

Section: Introductionmentioning

confidence: 99%

Phase-Field Simulation of Temperature-Dependent Thermal Shock Fracture of Al2O3/ZrO2 Multilayer Ceramics with Phase Transition Residual Stress

Pang

et al. 2023

Materials

View full text Add to dashboard Cite

Compared with single-phase ceramics, the thermal shock crack propagation mechanism of multiphase layered ceramics is more complex. There is no experimental method and theoretical framework that can fully reveal the thermal shock damage mechanism of ceramic materials. Therefore, a multiphase phase-field fracture model including the temperature dependence of material for thermal shock-induced fracture of multilayer ceramics is established. In this study, the effects of residual stress on the crack propagation of ATZ (Al2O3-5%tZrO2)/AMZ (Al2O3-30%mZrO2) layered ceramics with different layer thickness ratios, layers, and initial temperatures under bending and thermal shock were investigated. Simulation results of the fracture phase field under four-point bending are in good agreement with the experimental results, and the crack propagation shows a step shape, which verifies the effectiveness of the proposed method. With constant thickness, high-strength compressive stress positively changes with the layer thickness ratio, which contributes to crack deflection. The cracks of the ceramic material under thermal shock have hierarchy and regularity. When the layer thickness ratio is constant, the compressive residual stress decreases with the increase in the layer number, and the degree of thermal shock crack deflection decreases.

show abstract

Section: Introductionmentioning

confidence: 99%