Observations of He Platelets During He Ion Irradiation in 3C SiC

Benjamin T. Clay; Stephen E. Donnelly; Graeme Greaves

doi:10.1016/j.jnucmat.2021.153426

Observations of He Platelets During He Ion Irradiation in 3C SiC

Benjamin T. Clay, Stephen E. Donnelly, Graeme Greaves

Research output: Contribution to journal › Article › peer-review

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Abstract

Polycrystalline 3C SiC was irradiated and observed in-situ via Transmission Electron Microscopy with a 20keV He ion beam at 400, 800, 1000 and 1200°C at the Microscopes and Ion Accelerators for Materials Investigations facility. During the 400, 800, 1000 and 1200°C irradiations, black-spot damage was observed at 3.1, 1.1, 2.1 and 2.1 dpa respectively. Helium bubbles were observed after 6.3 dpa at 400°C and 2.1 dpa at 800°C, and He platelets were seen after 1.1 dpa at 800, 1000 and 1200°C but not observed during the 400°C irradiation. This work shows for the first time, the preferential nucleation of platelets within stacking faults in 3C SiC. The dependence of He platelet diameter with temperature and dose has also been observed.

Original language	English
Article number	153426
Number of pages	9
Journal	Journal of Nuclear Materials
Volume	559
Early online date	20 Nov 2021
DOIs	https://doi.org/10.1016/j.jnucmat.2021.153426
Publication status	Published - 1 Feb 2022

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title = "Observations of He Platelets During He Ion Irradiation in 3C SiC",

abstract = "Polycrystalline 3C SiC was irradiated and observed in-situ via Transmission Electron Microscopy with a 20keV He ion beam at 400, 800, 1000 and 1200°C at the Microscopes and Ion Accelerators for Materials Investigations facility. During the 400, 800, 1000 and 1200°C irradiations, black-spot damage was observed at 3.1, 1.1, 2.1 and 2.1 dpa respectively. Helium bubbles were observed after 6.3 dpa at 400°C and 2.1 dpa at 800°C, and He platelets were seen after 1.1 dpa at 800, 1000 and 1200°C but not observed during the 400°C irradiation. This work shows for the first time, the preferential nucleation of platelets within stacking faults in 3C SiC. The dependence of He platelet diameter with temperature and dose has also been observed.",

keywords = "SiC, Irradiation, Fusion, Helium, In-situ TEM",

author = "Clay, {Benjamin T.} and Donnelly, {Stephen E.} and Graeme Greaves",

note = "Funding Information: The authors are grateful to P.D. Edmondson for the experimental materials provided for this work, and to EPSRC for funding the DTP studentship of the lead author, and for the funding of the MIAMI facilities (Grant Nos. EP/E017266/1 and EP/M028283/1 ). Publisher Copyright: {\textcopyright} 2021 Copyright: Copyright 2022 Elsevier B.V., All rights reserved.",

year = "2022",

month = feb,

day = "1",

doi = "10.1016/j.jnucmat.2021.153426",

language = "English",

volume = "559",

journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Observations of He Platelets During He Ion Irradiation in 3C SiC

AU - Clay, Benjamin T.

AU - Donnelly, Stephen E.

AU - Greaves, Graeme

N1 - Funding Information: The authors are grateful to P.D. Edmondson for the experimental materials provided for this work, and to EPSRC for funding the DTP studentship of the lead author, and for the funding of the MIAMI facilities (Grant Nos. EP/E017266/1 and EP/M028283/1 ). Publisher Copyright: © 2021 Copyright: Copyright 2022 Elsevier B.V., All rights reserved.

PY - 2022/2/1

Y1 - 2022/2/1

N2 - Polycrystalline 3C SiC was irradiated and observed in-situ via Transmission Electron Microscopy with a 20keV He ion beam at 400, 800, 1000 and 1200°C at the Microscopes and Ion Accelerators for Materials Investigations facility. During the 400, 800, 1000 and 1200°C irradiations, black-spot damage was observed at 3.1, 1.1, 2.1 and 2.1 dpa respectively. Helium bubbles were observed after 6.3 dpa at 400°C and 2.1 dpa at 800°C, and He platelets were seen after 1.1 dpa at 800, 1000 and 1200°C but not observed during the 400°C irradiation. This work shows for the first time, the preferential nucleation of platelets within stacking faults in 3C SiC. The dependence of He platelet diameter with temperature and dose has also been observed.

AB - Polycrystalline 3C SiC was irradiated and observed in-situ via Transmission Electron Microscopy with a 20keV He ion beam at 400, 800, 1000 and 1200°C at the Microscopes and Ion Accelerators for Materials Investigations facility. During the 400, 800, 1000 and 1200°C irradiations, black-spot damage was observed at 3.1, 1.1, 2.1 and 2.1 dpa respectively. Helium bubbles were observed after 6.3 dpa at 400°C and 2.1 dpa at 800°C, and He platelets were seen after 1.1 dpa at 800, 1000 and 1200°C but not observed during the 400°C irradiation. This work shows for the first time, the preferential nucleation of platelets within stacking faults in 3C SiC. The dependence of He platelet diameter with temperature and dose has also been observed.

KW - SiC

KW - Irradiation

KW - Fusion

KW - Helium

KW - In-situ TEM

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U2 - 10.1016/j.jnucmat.2021.153426

DO - 10.1016/j.jnucmat.2021.153426

M3 - Article

VL - 559

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

M1 - 153426

ER -

Observations of He Platelets During He Ion Irradiation in 3C SiC

Abstract

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