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Your search keyword '"plasma immersion"' showing total 2 results
Start Over Descriptor "plasma immersion" Topic vacuum arc
2 results on '"plasma immersion"'

1. Formation of High-Power Pulsed Titanium Ion Beams of Submillisecond Duration from Vacuum Arc Plasma.

Author

Ryabchikov, A. I., Dektyarev, S. V., Korneva, O. S., and Vakhrushev, D. O.

Subjects
*PLASMA arcs, *ION beams, *VACUUM arcs, *FOCUSED ion beams, *ION implantation, *TITANIUM
Abstract

A method is proposed for improving the performance properties of various materials, based on the synergy of high-intensity ion implantation and simultaneous energy impact on the surface, aimed at creating deep ionalloyed layers. Its implementation requires the use of repetitively-pulsed high-power density beams of metal and gas ions of submillisecond durations. This article presents the results of experimental studies on forming pulsed high-intensity titanium ion beams from vacuum arc plasma. The effect of the cell size of the grid electrode, shaped as a part of a sphere, on the focusing and transport efficiency is studied. A possibility of ballistic focusing of a titanium ion beam with a pulse duration from 150 to 500 μs and a power density of up to 100 kW/cm2 is experimentally shown. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Aluminum Implantation in Kapton® for Space Applications: Magnetic Field Effects on Implantation in Vacuum Arcs

Author

R.S. Dallaqua, Antonio Fernando Beloto, Nicole R. Demarquette, Léon Gengembre, I.H. Tan, Mario Ueda, Jose O. Rossi, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Laboratorio Associado de Materiaias e Sensores, Instituto Nacional de Pequisas Espaciais, Depo Eng. Metalurgica e de Materiais, Escola Politecnica da USP, and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, oxidation, space polymers, Analytical chemistry, General Physics and Astronomy, 02 engineering and technology, Temperature cycling, Dielectric, 01 natural sciences, X-ray photoelectron spectroscopy, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], 0103 physical sciences, ion implantation, Composite material, 010302 applied physics, General Engineering, [CHIM.MATE]Chemical Sciences/Material chemistry, Vacuum arc, Plasma, 021001 nanoscience & nanotechnology, Plasma-immersion ion implantation, Kapton, Magnetic field, plasma immersion, surface charging, xps, vacuum arc, 0210 nano-technology
Abstract

Aluminum was implanted in samples of Kapton®, a polyimide commonly used in spacecrafts, in order to form a protective layer against degradation by atomic oxygen, abundant in space. Implantation was carried out in a vacuum-arc-generated aluminum plasma, with and without the presence of a confining magnetic field. The main effect of the magnetic field is to increase plasma density by two orders of magnitude and, as a result, the dielectric Kapton® sample should charge much faster than in the unmagnetized case. Implantation depths should therefore be larger in the unmagnetized case. Results of X-ray Photoelectron Spectroscopy depth profile analysis, however, showed similiar implantation depths in both cases, with magnetized samples having a slightly deeper and larger mixing layer. Possible mechanisms to explain this result are discussed. Both treatments resulted in an excellent protective layer as demonstrated by samples exposed to oxygen plasmas, adhesion, thermal cycling, transmission and reflectance tests.

Published
2005

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