Creep behavior of zirconia ceramics under a strong DC field. (June 2022)

• Record Type: Journal Article
• Authors: Liu, Dianguang; Wang, Kewei; Zhao, Ke; Liu, Jinling; An, Linan
• Is Part Of: Scripta materialia. Number 214(2022)
• Publication Date: 2022-06
• Subjects: Ceramics -- Superplasticity -- Electric current -- Grain boundary sliding -- Dislocation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.114654
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The tensile creep of 3 mol% Y2 O3 stabilized tetragonal ZrO2 ceramics under a DC field was systematically investigated. The results show that the deformation mechanism of the material strongly depends on the current density and the applied stress. Exceptionally large uniform elongation can be obtained only when the creep is dominated by dislocation accommodated grain-boundary sliding. A maximum uniform elongation of ∼300% is achieved at a strain rate close to 10 −3 s −1 . At an even higher strain rate of about 10 −2 s −1, uniform elongation is still near 100%. The current results suggest that high strain rate superplasticity can be induced by applying a strong electric field at proper stress and current density. Graphical abstract: Image, graphical abstract