Mechanisms and behavioral regularities of the vacuum-arc microparticles near and on a potential electrode immersed in plasma

It is experimentally revealed that the pulse-periodic bias potential provides a multifold decrease in the surface content of microparticles (MPs). It is ascertained that a decrease in the MP concentration at the target can be explained by several physical mechanisms. From experiments with a fine-structure grid, it is found that less than 10% of MPs negatively charged in the plasma can be reflected in the electric field of the charge-separation layer near the sample. A substantial decrease in the MP density occurs after direct interaction between a MP and the sample under the action of a negative HF short-pulse bias potential. Almost half the MP surface density is caused by ion sputtering. A twelvefold reduction in the MP surface density is attained when the target is irradiated for 2 min.     

High-intensity ion implantation - a technique to form finely dispersed intermetallic compounds in surface layers of metals

The results of experimental investigations of microstructure and phase composition of surface ion-alloyed layers of nickel, titanium, and iron formed under the conditions of high-intensity aluminum-ion implantation are presented. It is established that aluminum-ion implantation under high-intensity modes makes it possible to form finely-dispersed intermetallic phases of Me₃Al (Me = Ni, Ti, Fe) and MeAl (Ni, Ti), as well as solid solutions of a composition variable with respect to depth in the surface layers measuring up to 2000 nm. It is shown that the average grain-size of intermetallic phases formed in ion-alloyed layers is 20–80 nm. Regions of localization of the phases thus formed over the implanted layer depth are determined.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 44–52, September 2004.     

Regularities of Plasma-Immersion Formation of Long-Pulse High-Intensity Titanium Ion Beams

Russian Physics Journal - The results of experimental investigations on plasma-immersion formation of ballistically focused beams of low-energy titanium ions with the pulse duration up to 30...     

Formation,Focusing and Transport of Highintensity,Low-Energy Metal Ion Beams

Russian Physics Journal - High-intensity implantation of low-energy ions into various materials demonstrates the formation of long, ionalloyed layers having a thickness of tens and hundreds of...     

Aluminum Ion Beam Treatment of Zirconium Ceramics

Russian Physics Journal - The paper presents the radiation and thermal treatment of zirconium ceramics with high-energy Al ion beams generated at an accelerating voltage of 1.5 kV, which modifies...     

Special Aspects of High-Intensity Low-Energy Ion Implantation

Russian Physics Journal - Numerical simulations and experimental studies of surface and subsurface layers of different materials are performed in order to determine their real temperatures as a...