Control of structural parameters and thermal conductivity of BeO ceramics using heavy ion irradiation and post-radiation annealing. Issue 12 (15th August 2019)

• Record Type: Journal Article
• Authors: Trukhanov, A.V.; Kozlovskiy, A.L.; Ryskulov, A.E.; Uglov, V.V.; Kislitsin, S.B.; Zdorovets, M.V.; Trukhanov, S.V.; Zubar, T.I.; Astapovich, K.A.; Tishkevich, D.I.
• Is Part Of: Ceramics international. Volume 45:Issue 12(2019)
• Page Start: 15412
• Page End: 15416
• Publication Date: 2019-08-15
• Subjects: Heavy ions -- Radiation defects -- Nuclear power engineering -- Construction materials -- Radiation resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.05.039
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The paper presents the results of research on changes in structural properties of BeO ceramics under heavy ion irradiation and post-radiation annealing. Irradiation was carried out on heavy ion accelerator DC-60 using Ni 12+ ions with an energy of 100 MeV and irradiation fluence of 10 13 -10 14 ions/cm 2 . According to X-ray diffraction analysis, it was found that a decrease of diffraction peaks intensity and their shift to small-angles region indicate an increase in interplanar distances and crystal lattice parameters, the change of which is caused by defects migration and their implantation into interstitial lattice site. For annealed samples an increased intensity of diffraction peaks, comparable in magnitude with original sample intensities, is observed. The increasing fluence of irradiation leads to a sharp decrease in crystallinity degree and the formation of more than 6.5% amorphous inclusions. Meanwhile, post-radiation annealing allows reducing amorphous inclusions concentration by 3%, which leads to a decrease in defects and vacancies in the structure. Reduction of deformations and amorphous inclusions as well as conservation of thermal conductivity coefficient indicate a potential applicability of post-radiation annealing of BeO ceramics as a method to control radiation defects accumulation and subsequent structure amorphization.