Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO2 in reactor

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@article{9a7674c530084ba0ba5bdb19fa2ee8b0,
title = "Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO2 in reactor",
abstract = "Zirconium based alloys are used as fuel claddings in Light Water Reactors due to their good resistance to degradation and low neutron absorption cross section. However, life limiting processes occur during the service of the cladding such as oxidation and hydrogen-uptake. During the oxidation of the material, hydrogen enters the metal and it precipitates as brittle hydrides. In this study the 3D microstructure of a high burn-up and a low-burnup LK3/L Zircaloy-2 cladding is characterized and compared using FIB Tomography. 3D reconstruction of the oxides of the claddings shows that the crack volume fraction increases with the number of cycles in the reactor, reducing its protectiveness against further corrosion and H-uptake. The visualization of the metal-oxide interface revealed that the oxidation of the hydrides in the metal could induce crack formation in the oxide and therefore it could be one of the causes of the increasing oxidation and H-uptake in this material.",
keywords = "3D reconstruction, FIB Tomography, Zircaloy-2, H-uptake, oxidation, crack formation",
author = "A. Baris and S. Abolhassani and Chiu, {Y. L.} and Evans, {H. E.}",
year = "2018",
doi = "10.1080/09603409.2017.1392412",
language = "English",
volume = "35",
pages = "14--21",
journal = "Materials at High Temperatures",
issn = "0960-3409",
publisher = "Taylor & Francis",

}

RIS

TY - JOUR

T1 - Observation of crack microstructure in oxides and its correlation to oxidation and hydrogen-uptake by 3D FIB Tomography – case of Zr-ZrO2 in reactor

AU - Baris, A.

AU - Abolhassani, S.

AU - Chiu, Y. L.

AU - Evans, H. E.

PY - 2018

Y1 - 2018

N2 - Zirconium based alloys are used as fuel claddings in Light Water Reactors due to their good resistance to degradation and low neutron absorption cross section. However, life limiting processes occur during the service of the cladding such as oxidation and hydrogen-uptake. During the oxidation of the material, hydrogen enters the metal and it precipitates as brittle hydrides. In this study the 3D microstructure of a high burn-up and a low-burnup LK3/L Zircaloy-2 cladding is characterized and compared using FIB Tomography. 3D reconstruction of the oxides of the claddings shows that the crack volume fraction increases with the number of cycles in the reactor, reducing its protectiveness against further corrosion and H-uptake. The visualization of the metal-oxide interface revealed that the oxidation of the hydrides in the metal could induce crack formation in the oxide and therefore it could be one of the causes of the increasing oxidation and H-uptake in this material.

AB - Zirconium based alloys are used as fuel claddings in Light Water Reactors due to their good resistance to degradation and low neutron absorption cross section. However, life limiting processes occur during the service of the cladding such as oxidation and hydrogen-uptake. During the oxidation of the material, hydrogen enters the metal and it precipitates as brittle hydrides. In this study the 3D microstructure of a high burn-up and a low-burnup LK3/L Zircaloy-2 cladding is characterized and compared using FIB Tomography. 3D reconstruction of the oxides of the claddings shows that the crack volume fraction increases with the number of cycles in the reactor, reducing its protectiveness against further corrosion and H-uptake. The visualization of the metal-oxide interface revealed that the oxidation of the hydrides in the metal could induce crack formation in the oxide and therefore it could be one of the causes of the increasing oxidation and H-uptake in this material.

KW - 3D reconstruction

KW - FIB Tomography

KW - Zircaloy-2

KW - H-uptake

KW - oxidation

KW - crack formation

UR - http://www.scopus.com/inward/record.url?scp=85032341195&partnerID=8YFLogxK

U2 - 10.1080/09603409.2017.1392412

DO - 10.1080/09603409.2017.1392412

M3 - Article

AN - SCOPUS:85032341195

VL - 35

SP - 14

EP - 21

JO - Materials at High Temperatures

JF - Materials at High Temperatures

SN - 0960-3409

ER -