Microcracks in nuclear graphite and highly oriented pyrolytic graphite (HOPG)

Keyun Wen; James Marrow; Barry Marsden

doi:10.1016/j.jnucmat.2008.07.012

Microcracks in nuclear graphite and highly oriented pyrolytic graphite (HOPG)

Keyun Wen, James Marrow, Barry Marsden

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

Abstract

Microcracks with varied length and width are observed in nuclear grade graphite and highly oriented pyrolytic graphite (HOPG) by transmission electron microscopy. In situ observations show that these cracks tend to close up on heating the sample. The crystal dimensional change from in situ electron-irradiation also causes the closure of the cracks. Although some of the cracks may be identifiable as accommodation porosity (i.e. Mrozowski cracks), others appear to have already formed prior to carbonization and graphitization. © 2008 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	199-203
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	381
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jnucmat.2008.07.012
Publication status	Published - 31 Oct 2008

Keywords

Radiation (damage
microcracks in nuclear graphite and highly oriented pyrolytic graphite)
Electron beams (irradn.
Microcrack
Nuclear reactors (microcracks in nuclear graphite and highly oriented pyrolytic graphite)
nuclear oriented pyrolytic graphite microcrack

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10.1016/j.jnucmat.2008.07.012

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title = "Microcracks in nuclear graphite and highly oriented pyrolytic graphite (HOPG)",

abstract = "Microcracks with varied length and width are observed in nuclear grade graphite and highly oriented pyrolytic graphite (HOPG) by transmission electron microscopy. In situ observations show that these cracks tend to close up on heating the sample. The crystal dimensional change from in situ electron-irradiation also causes the closure of the cracks. Although some of the cracks may be identifiable as accommodation porosity (i.e. Mrozowski cracks), others appear to have already formed prior to carbonization and graphitization. {\textcopyright} 2008 Elsevier B.V. All rights reserved.",

keywords = "Radiation (damage, microcracks in nuclear graphite and highly oriented pyrolytic graphite), Electron beams (irradn., Microcrack, Nuclear reactors (microcracks in nuclear graphite and highly oriented pyrolytic graphite), nuclear oriented pyrolytic graphite microcrack",

author = "Keyun Wen and James Marrow and Barry Marsden",

year = "2008",

month = oct,

day = "31",

doi = "10.1016/j.jnucmat.2008.07.012",

language = "English",

volume = "381",

pages = "199--203",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier BV",

number = "1-2",

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TY - JOUR

T1 - Microcracks in nuclear graphite and highly oriented pyrolytic graphite (HOPG)

AU - Wen, Keyun

AU - Marrow, James

AU - Marsden, Barry

PY - 2008/10/31

Y1 - 2008/10/31

N2 - Microcracks with varied length and width are observed in nuclear grade graphite and highly oriented pyrolytic graphite (HOPG) by transmission electron microscopy. In situ observations show that these cracks tend to close up on heating the sample. The crystal dimensional change from in situ electron-irradiation also causes the closure of the cracks. Although some of the cracks may be identifiable as accommodation porosity (i.e. Mrozowski cracks), others appear to have already formed prior to carbonization and graphitization. © 2008 Elsevier B.V. All rights reserved.

AB - Microcracks with varied length and width are observed in nuclear grade graphite and highly oriented pyrolytic graphite (HOPG) by transmission electron microscopy. In situ observations show that these cracks tend to close up on heating the sample. The crystal dimensional change from in situ electron-irradiation also causes the closure of the cracks. Although some of the cracks may be identifiable as accommodation porosity (i.e. Mrozowski cracks), others appear to have already formed prior to carbonization and graphitization. © 2008 Elsevier B.V. All rights reserved.

KW - Radiation (damage

KW - microcracks in nuclear graphite and highly oriented pyrolytic graphite)

KW - Electron beams (irradn.

KW - Microcrack

KW - Nuclear reactors (microcracks in nuclear graphite and highly oriented pyrolytic graphite)

KW - nuclear oriented pyrolytic graphite microcrack

U2 - 10.1016/j.jnucmat.2008.07.012

DO - 10.1016/j.jnucmat.2008.07.012

M3 - Article

SN - 0022-3115

VL - 381

SP - 199

EP - 203

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-2

ER -

Microcracks in nuclear graphite and highly oriented pyrolytic graphite (HOPG)

Abstract

Keywords

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