In-situ TEM study of irradiation-induced damage mechanisms in monoclinic-ZrO2

被引：18

作者：

Liu, Junliang ^{[1
]}

Mir, Anamul Haq ^{[2
]}

He, Guanze ^{[1
]}

Danaie, Mohsen ^{[3
]}

Hinks, Jonathan ^{[2
]}

Donnelly, Stephen ^{[2
]}

Nordin, Heidi ^{[4
]}

Lozano-Perez, Sergio ^{[1
]}

Grovenor, Chris R. M. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford, England

[2] Univ Huddersfield, MIAMI Facil, Sch Comp & Engn, Huddersfield, W Yorkshire, England

[3] Electron Phys Sci Imaging Ctr, Diamond Light Source, Didcot, Oxon, England

[4] Canadian Nucl Labs, Chalk River, ON, Canada

来源：

ACTA MATERIALIA | 2020年 / 199卷

基金：

英国工程与自然科学研究理事会;

关键词：

Irradiation damage; Grain growth; In-situ transmission electron microscopy (TEM); transmission Kikuchi diffraction (TKD); YTTRIA-STABILIZED ZIRCONIA; ELECTRON BACKSCATTER DIFFRACTION; INDUCED PHASE-TRANSFORMATION; FUEL-CLADDING INTERFACE; TETRAGONAL-PHASE; RADIATION-DAMAGE; OXIDE-FILMS; POINT-DEFECTS; CUBIC ZRO2; CORROSION;

D O I：

10.1016/j.actamat.2020.08.064

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the microstructural and crystallographic evolution of nanocrystalline zirconia under heavy ion irradiation using in-situ transmission electron microscopy (TEM) and have studied the atomic configurations of defect clusters using aberration-corrected scanning transmission electron microscopy (STEM). Under heavy ion irradiation the monoclinic-ZrO2 is observed to transform into cubic phase, stabilised by the strain induced by irradiation-induced defect clusters. We suggest that the monoclinic-to-cubic transformation is martensitic in nature with an orientation relationship identified to be (100)(m)parallel to(100)(c) and [001](m)parallel to [001](c), By increasing the damage dose, both the formation of voids and irradiation-induced grain growth were observed. A model for the formation of voids is proposed, taking defect interactions into consideration. The study has also demonstrated that high resolution orientation mapping by transmission Kikuchi diffraction (TKD) combined with in-situ irradiation in a TEM is a powerful method to probe the mechanisms controlling irradiation-induced processes, including grain boundary migration, phase transformations and texture evolution. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：429 / 442

页数：14

共 95 条

[1] TEM examinations of the metal-oxide interface of zirconium based alloys irradiated in a pressurized water reactor [J].