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Thermal diffusivity of tungsten irradiated with protons up to 5.8 dpa

Habainy, Jemila LU ; Dai, Yong; Lee, Yongjoong and Iyengar, Srinivasan LU (2018) In Journal of Nuclear Materials 509. p.152-157
Abstract

Thermal properties of pure tungsten, irradiated in the Swiss neutron spallation source at the Paul Scherrer Institut, have been studied in the temperature range 25–500 °C. Disk-shaped specimens were prepared from a tungsten sheet which was irradiated with high energy protons and spallation neutrons. The specimens tested in this work received total damages of maximum 3.9 and 5.8 dpa at average irradiation temperatures of 115 and 140 °C, respectively. The thermal diffusivity of the irradiated tungsten was measured using the conventional flash method. For both specimens, the results show a significant decrease in thermal diffusivity after irradiation. Relative to unirradiated tungsten, the irradiated samples show thermal diffusivity values... (More)

Thermal properties of pure tungsten, irradiated in the Swiss neutron spallation source at the Paul Scherrer Institut, have been studied in the temperature range 25–500 °C. Disk-shaped specimens were prepared from a tungsten sheet which was irradiated with high energy protons and spallation neutrons. The specimens tested in this work received total damages of maximum 3.9 and 5.8 dpa at average irradiation temperatures of 115 and 140 °C, respectively. The thermal diffusivity of the irradiated tungsten was measured using the conventional flash method. For both specimens, the results show a significant decrease in thermal diffusivity after irradiation. Relative to unirradiated tungsten, the irradiated samples show thermal diffusivity values which are 28–51% lower, depending on temperature. Annealing of the irradiated specimen of 3.9 dpa at 1000 °C for 1 h resulted in a slight recovery of thermal diffusivity. In addition, thermal conductivity values were calculated from the thermal diffusivity data.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Irradiation effects, Spallation target, Thermal conductivity, Thermal diffusivity, Tungsten
in
Journal of Nuclear Materials
volume
509
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:85049334212
ISSN
0022-3115
DOI
10.1016/j.jnucmat.2018.06.041
language
English
LU publication?
yes
id
cb7213fd-5ca7-4721-863b-89a35ccbd7c1
date added to LUP
2018-07-12 12:53:06
date last changed
2018-07-12 12:53:06
@article{cb7213fd-5ca7-4721-863b-89a35ccbd7c1,
  abstract     = {<p>Thermal properties of pure tungsten, irradiated in the Swiss neutron spallation source at the Paul Scherrer Institut, have been studied in the temperature range 25–500 °C. Disk-shaped specimens were prepared from a tungsten sheet which was irradiated with high energy protons and spallation neutrons. The specimens tested in this work received total damages of maximum 3.9 and 5.8 dpa at average irradiation temperatures of 115 and 140 °C, respectively. The thermal diffusivity of the irradiated tungsten was measured using the conventional flash method. For both specimens, the results show a significant decrease in thermal diffusivity after irradiation. Relative to unirradiated tungsten, the irradiated samples show thermal diffusivity values which are 28–51% lower, depending on temperature. Annealing of the irradiated specimen of 3.9 dpa at 1000 °C for 1 h resulted in a slight recovery of thermal diffusivity. In addition, thermal conductivity values were calculated from the thermal diffusivity data.</p>},
  author       = {Habainy, Jemila and Dai, Yong and Lee, Yongjoong and Iyengar, Srinivasan},
  issn         = {0022-3115},
  keyword      = {Irradiation effects,Spallation target,Thermal conductivity,Thermal diffusivity,Tungsten},
  language     = {eng},
  month        = {10},
  pages        = {152--157},
  publisher    = {Elsevier},
  series       = {Journal of Nuclear Materials},
  title        = {Thermal diffusivity of tungsten irradiated with protons up to 5.8 dpa},
  url          = {http://dx.doi.org/10.1016/j.jnucmat.2018.06.041},
  volume       = {509},
  year         = {2018},
}