Postradiation defects in neutron-irradiated pyrolytic boron nitride

A. V. Kabyshev, V. M. Kezkalo, V. V. Lopatin, L. V. Serikov, Yu P. Surov, L. N. Shiyan

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Pyrolytic boron nitride (PBN) is a candidate material for armor elements of the discharge chamber in fusion reactors. Therefore it is urgent to study the origin of postradiation defects. In this paper the authors by combining the EPA and electron paramagnetic resonance (EPR) data deduce that the neutron irradiation of PBN results in the introduction of acceptor levels into the forbidden gap of the hexagonal boron nitride crystallites. And, that is the reason for decreasing concentration of positron sensitive defects (PSD) and Ps oxidation observed in anomalous magnetic quenching. When the annealing temperature is above or equal to 1300°/C the PSD concentration is observed to return to a higher value. These observations correlate with appearing TBC and indicate a redistribution of the defects in favor of those to which the filled donor levels correspond.

Original languageEnglish
JournalPhysica Status Solidi (A) Applied Research
Volume126
Issue number1
Publication statusPublished - Jul 1991

Fingerprint

Boron nitride
boron nitrides
Neutrons
neutrons
Defects
defects
Positrons
positrons
armor
fusion reactors
Armor
Neutron irradiation
Fusion reactors
neutron irradiation
Crystallites
crystallites
Paramagnetic resonance
Quenching
electron paramagnetic resonance
chambers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kabyshev, A. V., Kezkalo, V. M., Lopatin, V. V., Serikov, L. V., Surov, Y. P., & Shiyan, L. N. (1991). Postradiation defects in neutron-irradiated pyrolytic boron nitride. Physica Status Solidi (A) Applied Research, 126(1).

Postradiation defects in neutron-irradiated pyrolytic boron nitride. / Kabyshev, A. V.; Kezkalo, V. M.; Lopatin, V. V.; Serikov, L. V.; Surov, Yu P.; Shiyan, L. N.

In: Physica Status Solidi (A) Applied Research, Vol. 126, No. 1, 07.1991.

Research output: Contribution to journalArticle

Kabyshev, AV, Kezkalo, VM, Lopatin, VV, Serikov, LV, Surov, YP & Shiyan, LN 1991, 'Postradiation defects in neutron-irradiated pyrolytic boron nitride', Physica Status Solidi (A) Applied Research, vol. 126, no. 1.
Kabyshev, A. V. ; Kezkalo, V. M. ; Lopatin, V. V. ; Serikov, L. V. ; Surov, Yu P. ; Shiyan, L. N. / Postradiation defects in neutron-irradiated pyrolytic boron nitride. In: Physica Status Solidi (A) Applied Research. 1991 ; Vol. 126, No. 1.
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