Plasma devices for ion beam and plasma deposition applications

We describe the operation of some new axially-symmetric plasma devices based on plasma-optical principles and the plasma lens configuration. Plasma devices of this kind using permanent magnets can be applied in a number of different applications for ion treatment and materials synthesis.Описуються деякі нові плазмові прилади, основані на використанні принципів плазмооптики та конфігурації плазмової лінзи. Прилади такого типу, що використовують постійні магніти, можуть застосовуватись для іонної обробки та отримання нових матеріалів.Описываются некоторые новые плазменные приборы, основанные на принципах плазмооптики и конфигурации плазменной линзы. Приборы такого типа, в которых используются постоянные магниты, могут применяться для ионной обработки и получения новых материалов

Structure, phase composition and microhardness of vacuum-arc multilayered Ti/Al, Ti/Cu, Ti/Fe, Ti/Zr nano-structures with different periods

The microstructure, phase composition and microhardness of multilayered Ti/Al, Ti/Cu, Ti/Fe and Ti/Zr condensates produced on stainless steel substrates via vacuum-arc evaporation of pure metals were studied. The sublayer periods (Λ) were regulated in the range 80–850 nm by varying the vacuum discharge current and the duration of the successive depositions of metallic plasma onto the substrates while maintaining the total deposition time constant. The regularity of the obtained nanostructures was investigated by scanning and transmission electron microscopy while phase compositions were identified with X-ray diffraction (XRD) analysis in order to evidence the presence of interdiffusion and the amount of intermetallics. Condensates cross sections were mechanically characterized by means of microhardness tests. Measurements were correlated to the periods and to the presence of intermetallics

Femtosecond Laser-Induced Periodic Surface Structures on 2D Ti-Fe Multilayer Condensates

2D Ti-Fe multilayer preparation has been attracting increased interest due to its ability to form intermetallic compounds between metallic titanium and metallic iron thin layers. In particular, the TiFe compound can absorb hydrogen gas at room temperature. We applied femtosecond laser pulses to heat Ti-Fe multilayer structures to promote the appearance of intermetallic compounds and generate surface nanostructuring. The surface pattern, known as Laser Induced Periodic Surface Structures (LIPSS), can accelerate the kinetics of chemical interaction between solid TiFe and gaseous hydrogen. The formation of LIPSS on Ti-Fe multilayered thin films were investigated using of scanning electron microscopy, photo-electron spectroscopy and X-ray diffraction. To explore the thermal response of the multiple layered structure and the mechanisms leading to surface patterning after irradiating the compound with single laser pulses, theoretical simulations were conducted to interpret the experimental observations

Reflection coefficient and corrosion resistance of vacuum deposited nickel coatings

22.00; Translated from Russian (Problemy Spetsial'noi Elektrometallurgii 1989 v. 5(3) p. 51-55)Available from British Library Document Supply Centre- DSC:9023.19(VR-Trans--4427)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Optical and mechanical properties of thin films of indium oxide doped with tin

22.00; Translated from Russian (Problemy Spetsial'noi Elektrometallurgii 1990 v. 6(1) p. 61-65)Available from British Library Document Supply Centre- DSC:9023.19(VR-Trans--4545)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Problems of preservation of architectural heritage of the historical center of Kiev in conditions of increasing ecological and technogenic risk

The substantial part of the historical centre of Kiev with the architectural heritage is located in the zones of a geological risk, i.e. zones of the development of the dangerous natural and tech-nogenic processes. The town-building activity without taking into account the geological risk can considerably decrease the effectiveness of the efforts for the heritage conservation. The problem is that to the risk decrease and to increase the heritage stability and the steady existence of the objects with a common infrastructure. At the basis of the concept is stated a forestall strategy, a monitoring of the surrounding and the heritage objects with use of the contemporary technologies. There are represented the special features of the program - purposive approach to the solution of the problem of the preservation and conservation of the architectural heritage at the urbanized territory under the conditions of the increasing ecological and technogenic risk of the geological environment. The special feature of this approach is a consideration of the significant role of the upper lithosphere for the stability of the bases of the architectural heritage and the ground-based technosphere of the cit