Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 438, Issue -, Pages S963-S966Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2013.01.209
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Thermal desorption spectrometry (TDS) has been investigated to obtain fundamental information of hydrogen behavior in graphite and CFC especially at high temperatures. Thirteen brands of graphite and CFC materials charged with deuterium gas are tested up to the temperature of 1720 K with a heating rate of 0.1 K/s. TDS spectra have at least four peaks at 600-700 K, around 900 K, 1300-1450 K and 1600-1650 K. The change of TDS spectra is measured for the samples, which are charged with deuterium at 1273 K under a different pressure in the range of 83 Pa to 79 kPa. Physical and chemical states of deuterium in graphite and mechanisms of desorption are discussed. (C) 2013 Elsevier B.V. All rights reserved.
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