Structural Changes in the Vanadium Sample Surface Induced by Pulsed High-Temperature Deuterium Plasma and Deuterium Ion Fluxes
- Authors: Borovitskaya I.V.1, Pimenov V.N.1, Gribkov V.A.1,2, Padukh M.2, Bondarenko G.G.3, Gaidar A.I.4, Paramonova V.V.1, Morozov E.V.1
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Affiliations:
- Baikov Institute of Metallurgy and Materials Science
- Institute of Plasma Physics and Laser Microsynthesis
- National Research University Higher School of Economics
- Research Institute of Advanced Materials and Technologies
- Issue: Vol 2017, No 11 (2017)
- Pages: 928-935
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/171815
- DOI: https://doi.org/10.1134/S0036029517110064
- ID: 171815
Cite item
Abstract
The structural changes in the vanadium sample surface are studied as functions of the conditions of irradiation by pulsed high-temperature deuterium plasma and deuterium ion fluxes in the Plasma Focus installation. It is found that processes of partial evaporation, melting, and crystallization of the surface layer of vanadium samples take place in the plasma flux power density range q = 108–1010 W/cm2 and the ion flux density range q = 1010–1012 W/cm2. The surface relief is wavelike. There are microcracks, gas-filled bubbles (blisters), and traces of fracture on the surface. The blisters are failed in the solid state. The character of blister fracture is similar to that observed during usual ion irradiation in accelerators. The samples irradiated at relatively low power density (q = 107–108 W/cm2) demonstrate the ejection of microparticles (surface fragments) on the side facing plasma. This process is assumed to be due to the fact that the unloading wave formed in the sample–target volume reaches its irradiated surface. Under certain irradiation conditions (sample–anode distance, the number of plasma pulses), a block microstructure with block sizes of several tens of microns forms on the sample surfaces. This structure is likely to form via directional crack propagation upon cooling of a thin melted surface layer.
Keywords
About the authors
I. V. Borovitskaya
Baikov Institute of Metallurgy and Materials Science
Author for correspondence.
Email: symp@imet.ac.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991
V. N. Pimenov
Baikov Institute of Metallurgy and Materials Science
Email: symp@imet.ac.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991
V. A. Gribkov
Baikov Institute of Metallurgy and Materials Science; Institute of Plasma Physics and Laser Microsynthesis
Email: symp@imet.ac.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991; ul. Hery 23, Warsaw, 01-497
M. Padukh
Institute of Plasma Physics and Laser Microsynthesis
Email: symp@imet.ac.ru
Poland, ul. Hery 23, Warsaw, 01-497
G. G. Bondarenko
National Research University Higher School of Economics
Email: symp@imet.ac.ru
Russian Federation, ul. Myasnitskaya 20, Moscow, 101000
A. I. Gaidar
Research Institute of Advanced Materials and Technologies
Email: symp@imet.ac.ru
Russian Federation, ul. Malaya Pionerskaya 12, Moscow, 115054
V. V. Paramonova
Baikov Institute of Metallurgy and Materials Science
Email: symp@imet.ac.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991
E. V. Morozov
Baikov Institute of Metallurgy and Materials Science
Email: symp@imet.ac.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991