Microstructure of CuCrZrV and ODS(Y2O3)-Cu Alloys After Neutron Irradiation at 150, 350, and 450 ◦C to 2.5 dpa

Michail Klimenkov; Carsten Bonnekoh; Ute Jaentsch; Michael Rieth; Hans-Christian Schneider; Dmitry Terentyev; Koray Iroc; Wouter Van Renterghem

doi:10.3390/ma18071401

Microstructure of CuCrZrV and ODS(Y2O3)-Cu Alloys After Neutron Irradiation at 150, 350, and 450 ◦C to 2.5 dpa

Michail Klimenkov, Carsten Bonnekoh, Ute Jaentsch, Michael Rieth, Hans-Christian Schneider, Dmitry Terentyev, Koray Iroc, Wouter Van Renterghem

Microstructural and Non-destructive Analysis

Research output › peer-review

Abstract

In this study, the results of transmission electron microscopy (TEM) examinations of neutron-irradiated (2.5 dpa at 150 ◦C, 350 ◦C, and 450 ◦C) CuCrZrV and ODS(Y2O3)-Cu alloys are presented. These materials were developed for application as heat sink materials in fusion technology. This study includes TEM imaging and quantitative analysis of neutron radiation-induced defects such as dislocation loops and voids as well as the determination of the conditions for their formation. It was found that dislocation loops of a0½⟨110⟩ type form in both alloys at all irradiation temperatures. The formation of voids in CuCrZrV alloy is effectively suppressed. The neutron irradiation causes a redistribution of Cr, Zr, and V in the CuCrZrV alloy. A particular focus was on the investigation of the distribution of the transmutation products Ni and Zn. Ni tends to segregate at the Cr-rich clusters and forms a shell around them, while Zn is evenly distributed.

Original language	English
Article number	1401
Number of pages	16
Journal	Materials
Volume	18
DOIs	https://doi.org/10.3390/ma18071401
State	Published - 21 Mar 2025

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@article{540d392431b344d5a8a873e588b8d83d,

title = "Microstructure of CuCrZrV and ODS(Y2O3)-Cu Alloys After Neutron Irradiation at 150, 350, and 450 ◦C to 2.5 dpa",

abstract = "In this study, the results of transmission electron microscopy (TEM) examinations of neutron-irradiated (2.5 dpa at 150 ◦C, 350 ◦C, and 450 ◦C) CuCrZrV and ODS(Y2O3)-Cu alloys are presented. These materials were developed for application as heat sink materials in fusion technology. This study includes TEM imaging and quantitative analysis of neutron radiation-induced defects such as dislocation loops and voids as well as the determination of the conditions for their formation. It was found that dislocation loops of a0½⟨110⟩ type form in both alloys at all irradiation temperatures. The formation of voids in CuCrZrV alloy is effectively suppressed. The neutron irradiation causes a redistribution of Cr, Zr, and V in the CuCrZrV alloy. A particular focus was on the investigation of the distribution of the transmutation products Ni and Zn. Ni tends to segregate at the Cr-rich clusters and forms a shell around them, while Zn is evenly distributed.",

keywords = "CuCrZr, Neutron irradiation, Microstructure",

author = "Michail Klimenkov and Carsten Bonnekoh and Ute Jaentsch and Michael Rieth and Hans-Christian Schneider and Dmitry Terentyev and Koray Iroc and {Van Renterghem}, Wouter",

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T1 - Microstructure of CuCrZrV and ODS(Y2O3)-Cu Alloys After Neutron Irradiation at 150, 350, and 450 ◦C to 2.5 dpa

AU - Klimenkov, Michail

AU - Bonnekoh, Carsten

AU - Jaentsch, Ute

AU - Rieth, Michael

AU - Schneider, Hans-Christian

AU - Terentyev, Dmitry

AU - Iroc, Koray

AU - Van Renterghem, Wouter

N1 - Score=10

PY - 2025/3/21

Y1 - 2025/3/21

N2 - In this study, the results of transmission electron microscopy (TEM) examinations of neutron-irradiated (2.5 dpa at 150 ◦C, 350 ◦C, and 450 ◦C) CuCrZrV and ODS(Y2O3)-Cu alloys are presented. These materials were developed for application as heat sink materials in fusion technology. This study includes TEM imaging and quantitative analysis of neutron radiation-induced defects such as dislocation loops and voids as well as the determination of the conditions for their formation. It was found that dislocation loops of a0½⟨110⟩ type form in both alloys at all irradiation temperatures. The formation of voids in CuCrZrV alloy is effectively suppressed. The neutron irradiation causes a redistribution of Cr, Zr, and V in the CuCrZrV alloy. A particular focus was on the investigation of the distribution of the transmutation products Ni and Zn. Ni tends to segregate at the Cr-rich clusters and forms a shell around them, while Zn is evenly distributed.

AB - In this study, the results of transmission electron microscopy (TEM) examinations of neutron-irradiated (2.5 dpa at 150 ◦C, 350 ◦C, and 450 ◦C) CuCrZrV and ODS(Y2O3)-Cu alloys are presented. These materials were developed for application as heat sink materials in fusion technology. This study includes TEM imaging and quantitative analysis of neutron radiation-induced defects such as dislocation loops and voids as well as the determination of the conditions for their formation. It was found that dislocation loops of a0½⟨110⟩ type form in both alloys at all irradiation temperatures. The formation of voids in CuCrZrV alloy is effectively suppressed. The neutron irradiation causes a redistribution of Cr, Zr, and V in the CuCrZrV alloy. A particular focus was on the investigation of the distribution of the transmutation products Ni and Zn. Ni tends to segregate at the Cr-rich clusters and forms a shell around them, while Zn is evenly distributed.

KW - CuCrZr

KW - Neutron irradiation

KW - Microstructure

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/91757291

U2 - 10.3390/ma18071401

DO - 10.3390/ma18071401

M3 - Article

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JO - Materials

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