Structure-phase states of the metal surface and undersurface layers after the treatment by powerful ion beams

A. D. Korotaev, S. V. Ovchinnikov, Yu I. Pochivalov, A. N. Tyumentsev, D. A. Shchipakin, M. V. Tretjak, I. F. Isakov, G. E. Remnev

Research output: Contribution to journalArticle

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Abstract

The structural phase state and strength properties of the surface layer and bulk were studied for metals and alloys with different melting temperatures exposed to high-power ion beams (HPIBs). It has been established that, irrespective of the ion beam specific power (Q ≈12-50 MW cm-2) and in the absence of surface melting, a characteristic feature of the surface morphology is crater formation. The disclination and microtwin-type rotation defects, microcracks, the surface layer amorphization and dislocation substructures of different dislocation density were observed inside and in the vicinity of craters. It has been shown that changes in the element and phase states of the surface layer are due to vapor-plasma cloud deposition and adsorption of the gas medium of the accelerator working vacuum. A physical concept of the formation of high local gradients (moments) of stresses with their relaxation through disclination-type rotation effects under the HPIB action has been developed. A high-energy substructure with a high continuum disclination density was found experimentally. The evolution of the defect substructure was examined, depending on the distance from the surface under irradiation. Physical models of the crater formation and mechanisms for the formation of the dislocation-disclination substructures under the HPIB irradiation are proposed.

Original languageEnglish
Pages (from-to)84-90
Number of pages7
JournalSurface and Coatings Technology
Volume105
Issue number1-2
DOIs
Publication statusPublished - 5 Jun 1998

Fingerprint

Phase structure
substructures
Ion beams
metal surfaces
surface layers
Metals
ion beams
craters
melting
plasma clouds
irradiation
Irradiation
microcracks
defects
Defects
Amorphization
Microcracks
accelerators
Particle accelerators
Surface morphology

Keywords

  • Dislocation
  • Ion beams
  • Metals
  • Structure

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Korotaev, A. D., Ovchinnikov, S. V., Pochivalov, Y. I., Tyumentsev, A. N., Shchipakin, D. A., Tretjak, M. V., ... Remnev, G. E. (1998). Structure-phase states of the metal surface and undersurface layers after the treatment by powerful ion beams. Surface and Coatings Technology, 105(1-2), 84-90. https://doi.org/10.1016/S0257-8972(98)00473-3

Structure-phase states of the metal surface and undersurface layers after the treatment by powerful ion beams. / Korotaev, A. D.; Ovchinnikov, S. V.; Pochivalov, Yu I.; Tyumentsev, A. N.; Shchipakin, D. A.; Tretjak, M. V.; Isakov, I. F.; Remnev, G. E.

In: Surface and Coatings Technology, Vol. 105, No. 1-2, 05.06.1998, p. 84-90.

Research output: Contribution to journalArticle

Korotaev, AD, Ovchinnikov, SV, Pochivalov, YI, Tyumentsev, AN, Shchipakin, DA, Tretjak, MV, Isakov, IF & Remnev, GE 1998, 'Structure-phase states of the metal surface and undersurface layers after the treatment by powerful ion beams', Surface and Coatings Technology, vol. 105, no. 1-2, pp. 84-90. https://doi.org/10.1016/S0257-8972(98)00473-3
Korotaev, A. D. ; Ovchinnikov, S. V. ; Pochivalov, Yu I. ; Tyumentsev, A. N. ; Shchipakin, D. A. ; Tretjak, M. V. ; Isakov, I. F. ; Remnev, G. E. / Structure-phase states of the metal surface and undersurface layers after the treatment by powerful ion beams. In: Surface and Coatings Technology. 1998 ; Vol. 105, No. 1-2. pp. 84-90.
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