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Effect of temperature on microstructures and retention properties in tungsten exposed to D + He + Be mixture plasmas in PISCES.

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Title: Effect of temperature on microstructures and retention properties in tungsten exposed to D + He + Be mixture plasmas in PISCES.
Authors: Iijima, N.1 s139101@matsu.shimane-u.ac.jp, Miyamoto, M.1 miyamoto@riko.shimane-u.ac.jp, Nishijima, D.2, Baldwin, M.J.2, Doerner, R.P.2, Ueda, Y.3, Sagara, A.4, Höschen, T.5
Source: Journal of Nuclear Materials. Aug2015, Vol. 463, p979-982. 4p.
Subjects: Microstructure, Tungsten, Thermal stresses, Thermal properties, Helium
Abstract: The influence of temperature on microstructures and D retention properties in tungsten exposed to D + He + Be mixture plasmas is investigated. For the low temperature exposure case at 573 K, the Be seeding to D + He mixture plasmas results in the suppression of high density He nano-bubbles, which are distinctive internal defects observed in He irradiated/exposed metals. In contrast, fine and high-density He bubbles appear for W exposed to D + He + Be mixture plasmas at higher temperatures of >773 K. TDS measurements also show that the influence of Be seeding to D + He mixture plasmas, which counteracts the significant reduction in D retention, becomes weak with increasing temperature. From XPS analyses, it is considered that Be 2 W is formed by interdiffusion and solid-state-reaction at the high temperature exposure case, and the influence of the metallic Be on surface properties gradually disappears with increasing temperature. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Nuclear Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 103407608
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Effect of temperature on microstructures and retention properties in tungsten exposed to D + He + Be mixture plasmas in PISCES.
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  Data: <searchLink fieldCode="AR" term="%22Iijima%2C+N%2E%22">Iijima, N.</searchLink><relatesTo>1</relatesTo><i> s139101@matsu.shimane-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Miyamoto%2C+M%2E%22">Miyamoto, M.</searchLink><relatesTo>1</relatesTo><i> miyamoto@riko.shimane-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Nishijima%2C+D%2E%22">Nishijima, D.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Baldwin%2C+M%2EJ%2E%22">Baldwin, M.J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Doerner%2C+R%2EP%2E%22">Doerner, R.P.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Ueda%2C+Y%2E%22">Ueda, Y.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Sagara%2C+A%2E%22">Sagara, A.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Höschen%2C+T%2E%22">Höschen, T.</searchLink><relatesTo>5</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Nuclear+Materials%22">Journal of Nuclear Materials</searchLink>. Aug2015, Vol. 463, p979-982. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten%22">Tungsten</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stresses%22">Thermal stresses</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties%22">Thermal properties</searchLink><br /><searchLink fieldCode="DE" term="%22Helium%22">Helium</searchLink>
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  Data: The influence of temperature on microstructures and D retention properties in tungsten exposed to D + He + Be mixture plasmas is investigated. For the low temperature exposure case at 573 K, the Be seeding to D + He mixture plasmas results in the suppression of high density He nano-bubbles, which are distinctive internal defects observed in He irradiated/exposed metals. In contrast, fine and high-density He bubbles appear for W exposed to D + He + Be mixture plasmas at higher temperatures of >773 K. TDS measurements also show that the influence of Be seeding to D + He mixture plasmas, which counteracts the significant reduction in D retention, becomes weak with increasing temperature. From XPS analyses, it is considered that Be 2 W is formed by interdiffusion and solid-state-reaction at the high temperature exposure case, and the influence of the metallic Be on surface properties gradually disappears with increasing temperature. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Nuclear Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1016/j.jnucmat.2014.10.099
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      – Code: eng
        Text: English
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        StartPage: 979
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        Type: general
      – SubjectFull: Tungsten
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      – SubjectFull: Thermal stresses
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      – SubjectFull: Thermal properties
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      – TitleFull: Effect of temperature on microstructures and retention properties in tungsten exposed to D + He + Be mixture plasmas in PISCES.
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              Text: Aug2015
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