Effect of Long-Range Interaction in the Modification of Near-Surface Layers of WC–Co Samples by Pulsed Ion Beam
| Parent link: | Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques.— .— New York: Springer Science+Business Media LLC. Vol. 18, No. 1.— 2024.— P. 222-228 |
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| Résumé: | Title screen The results of modification of WC–Co samples by a pulsed beam of nitrogen ions (200–300 keV, 120 ns) with an energy density of 7–8 J/cm2 are presented. It is shown that the change in the structure occurs in the near-surface layer with a thickness of 20–30 μm, which significantly exceeds the range of ions in the target (≈0.5 μm) and the depth of propagation of the thermal front during the pulse (≈1 μm). Various mechanisms of the long-range effect, namely, the formation of a shock wave, the generation of primary radiation defects, etc. are analyzed. It is shown that the long-range effect is associated with the charge exchange of ions and the formation of fast atoms. The simulation of the charge exchange of ions in the gaseous layer of desorbed molecules is performed. It is found that the probability of ion charge exchange in the processes N+ + N2 → N0 and N+ + O2 → N0 significantly exceeds 100%, which indicates that the effect of irradiation of the target by fast atoms must be taken into account. In contrast to ions, when the target is irradiated with atoms, the efficiency of the formation of radiation defects is much higher Текстовый файл AM_Agreement |
| Langue: | anglais |
| Publié: |
2024
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| Accès en ligne: | https://doi.org/10.1134/S1027451024010348 |
| Format: | Électronique Chapitre de livre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=672816 |