Growth of beryllium oxide nano-structures during thermal treatment of neutron irradiated beryllium

  • Elina Pajuste Institute of Chemical Physics, University of Latvia, 4 blvd. Kronvalda, Riga, LV-1010, Latvia
  • Gunta Kizane Institute of Chemical Physics, University of Latvia, 4 blvd. Kronvalda, Riga, LV-1010, Latvia
  • Liga Avotina Institute of Chemical Physics, University of Latvia, 4 blvd. Kronvalda, Riga, LV-1010, Latvia
Keywords: beryllium, beryllium oxide, neutron irradiation, thermal treatment, nano structure

Abstract

Beryllium oxide nano-structures grown during high temperature oxidation of neutron irradiated beryllium has been investigated. Oxidation of non - irradiated and neutron irradiated beryllium was performed in differential thermal analyzer in an atmosphere of air and its mixture with helium at temperatures up to 1050°C. Structure of beryllium and its oxide was studied by the means of scanning electron microscopy. The growth of beryllium oxide nano-structures – “labyrinth type” layers and nano-rods on the inner surfaces of neutron irradiated beryllium were observed by means of Scanning Electron Microscopy. The size of the rods was 10-100 nm in diameter and up to few micrometers in length. There were no BeO nano-rods found on the surfaces of non-irradiated pebbles after similar treatment. Therefore, it might be concluded that neutron induced irradiation damages, such as dislocation loops, are responsible for the growth of BeO nano-structures.

DOI: http://dx.doi.org/10.5755/j01.ms.21.2.6822

Published
2015-06-29
Section
METALS, ALLOYS, COATINGS