Multiwalled boron nitride microtubes (BNMTs) shielding in thermal neutron absorbing


Arslan K., Seval H. K. , Murathan O. F. , Soysal K.

RADIATION EFFECTS AND DEFECTS IN SOLIDS, cilt.173, ss.555-566, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 173
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1080/10420150.2018.1484742
  • Dergi Adı: RADIATION EFFECTS AND DEFECTS IN SOLIDS
  • Sayfa Sayıları: ss.555-566

Özet

In this study, multiwalled boron nitride microtubes (BNMTs) were synthesised from amorphous boron powder in pure nitrogen atmosphere controlled graphite furnace at 1300 degrees C for 6h with amorphous boron/manganese (IV) oxide (MnO2) catalyst mass ratio of 1/1. It was found that the synthesised BNMTs outer diameters and the lengths vary between 0.68 and 1.57 mu m and between 6.79 and 31.23 mu m, respectively, by the scanning electron microscope analysis. The surface layer of AISI 1040 steel material was coated with multiwalled BNMTs at 950 degrees C for 4h in a foundry furnace. Transport phenomena of BNMT molecules on surfaces of the steel were considered by diffusion. Neutrons from obtained Am-241-Be source were irradiated on the Fe-58 nuclei. The irradiation properties of the without and with BNMT coated steel materials were studied in the field of gamma emitted by Co-60. The radiation exposure rate of gamma radiation sources used at 1099 and 1291keV, respectively. The higher peak area was obtained in steel coated with BNMT according to non-coated steel from irradiation results of samples. These results show that BNMT coated steel was more capable for radiation shielding.