Electron microscopy of γ-irradiated tungsten and molybdenum crystals

V. A. Mashtakova, A. A. Salomatin, B. B. Shishkin, A. P. Mamontov, N. N. Nikitenko, I. P. Chernov

Research output: Contribution to journalArticle

Abstract

Electron microscopy has been applied to surface structure and emissivity for polycrystalline tungsten carbide and molybdenum and tungsten single crystals irradiated by γ-rays. The scanning electron microscope showed that γ-irradiation produced microrelief substantially affected by annealing; on the whole, the surface appeared as though it had melted, and craters were formed on the W. Melted parts also appeared on WC. The emission microscope was used to examine the structural changes on annealing, including the emissivity. With polycrystalline Mo, recrystallization occurred. At 1800-1820 K for W, 1680-1850 K for Mo, and 1350-1450 K for WC, the surfaces showed processes related to exothermic reactions between point defects produced by the γ-rays.

Original languageEnglish
Pages (from-to)95-96
Number of pages2
JournalMoscow University Physics Bulletin (English Translation of Vestnik Moskovskogo Universiteta, Fizika)
Volume43
Issue number5
Publication statusPublished - 1988

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Electron microscopy
Molybdenum
molybdenum
Tungsten
electron microscopy
tungsten
Annealing
emissivity
Crystals
Exothermic reactions
Tungsten carbide
rays
Point defects
Surface structure
crystals
Microscopes
annealing
tungsten carbides
Electron microscopes
exothermic reactions

ASJC Scopus subject areas

  • Engineering(all)

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Electron microscopy of γ-irradiated tungsten and molybdenum crystals. / Mashtakova, V. A.; Salomatin, A. A.; Shishkin, B. B.; Mamontov, A. P.; Nikitenko, N. N.; Chernov, I. P.

In: Moscow University Physics Bulletin (English Translation of Vestnik Moskovskogo Universiteta, Fizika), Vol. 43, No. 5, 1988, p. 95-96.

Research output: Contribution to journalArticle

Mashtakova, V. A. ; Salomatin, A. A. ; Shishkin, B. B. ; Mamontov, A. P. ; Nikitenko, N. N. ; Chernov, I. P. / Electron microscopy of γ-irradiated tungsten and molybdenum crystals. In: Moscow University Physics Bulletin (English Translation of Vestnik Moskovskogo Universiteta, Fizika). 1988 ; Vol. 43, No. 5. pp. 95-96.
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AU - Shishkin, B. B.

AU - Mamontov, A. P.

AU - Nikitenko, N. N.

AU - Chernov, I. P.

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AB - Electron microscopy has been applied to surface structure and emissivity for polycrystalline tungsten carbide and molybdenum and tungsten single crystals irradiated by γ-rays. The scanning electron microscope showed that γ-irradiation produced microrelief substantially affected by annealing; on the whole, the surface appeared as though it had melted, and craters were formed on the W. Melted parts also appeared on WC. The emission microscope was used to examine the structural changes on annealing, including the emissivity. With polycrystalline Mo, recrystallization occurred. At 1800-1820 K for W, 1680-1850 K for Mo, and 1350-1450 K for WC, the surfaces showed processes related to exothermic reactions between point defects produced by the γ-rays.

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