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Nanostructuring of surfaces of metalloceramic and ceramic materials by electron-beams

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Russian Physics Journal Aims and scope

Abstract

An electron-emitting source generating a low-energy beam measuring 1–3 cm in diameter, with current up to 300 A, pulse duration within 50–200 µs, and pulse repetition frequency up to 10 Hz is investigated in a gas-filled diode with a mesh plasma cathode at the accelerating voltage up to 25 kV. The beam is transported in a longitudinal pulsed magnetic field to a distance of up to 30 cm towards the region of its interaction with a solid. For the current densities up to 100 A/cm2, it provides the power density as high as 10–100 J/cm2 sufficient to melt surfaces of metals, alloys, and composite (metalloceramic) materials within one or a few pulses. This makes this beam useful for modification of material surfaces and articles made thereof. Using the methods of optical, scanning and diffraction electron microscopy, by building micro-and nanohardness profiles, and via identification of the treated surface roughness, the phase composition and the substructure state of the materials subjected to pulsed low-energy e-beam of sub-millimeter durations are investigated. Formation of submicro-and nanocrystalline multi-phase structure is observed, which ensures a multiple increase in physico-mechanical and tribological characteristics of the treated material.

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Authors and Affiliations

  1. The Institute of High-Current Electronics of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia

    N. N. Koval’ & Yu. F. Ivanov

Authors
  1. N. N. Koval’
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  2. Yu. F. Ivanov
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Correspondence to N. N. Koval’.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 60–70, May, 2008.

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Koval’, N.N., Ivanov, Y.F. Nanostructuring of surfaces of metalloceramic and ceramic materials by electron-beams. Russ Phys J 51, 505–516 (2008). https://doi.org/10.1007/s11182-008-9073-7

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  • DOI: https://doi.org/10.1007/s11182-008-9073-7

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