Generation of nanoparticles in the concentrated energy (laser beam) and gas flow

The method of generation and selection of small nanoparticles in the airflow is considered in this paper. To melt the material (stainless steel), a concentrated energy flow – a pulsed solid‐state laser beam – was used. Using the Mossbauer spectroscopy method, the particle sizes and their chemical composition at various distances from the melting place were determined. The influence of parameters of the laser beam power and the airflow on the size of particles and their chemical composition was investigated. First Published Online: 14 Oct 201

Tribological behavior of steel (iron) - Foleox system

The paper describes results of the study of tribological characteristics of the steel - fluoroligomer (Foleox) system and regularities of interaction between fluoroligomer and iron. It is found that the fluoroligomer film reduces the friction torque and wear of seal members that favors the cyclic delivery of fuel pumps. The effect of fluoroligomer on the pair tribological behavior is explained by the formation of carbides on the surface of iron and changes in its structureFizikos institutasVytauto Didžiojo universitetasŽemės ūkio akademij

The properties and physicochemical interactions in iron-fluor-oligomer systems

We explore the efficiency of fuel pumps by modifying the friction surfaces with fluor-oligomeric films, analyze the peculiarities of interaction between the fluor-oligomer and iron, and investigate the influence of fluor-oligomer on the corrosive properties of iron. After processing the surfaces of precise friction pairs with fluor-oligomer, the average cyclic delivery of fuel pumps increases by up to 18%, and the elevated efficiency persists for 40 hours of operation. The fluor-oligomer lowers wear as compared with the control version, especially at higher rotation speeds. The positive effect is explained by the chemical interaction between iron and the fluoroligomer film as follows from the data obtained by the Mössbauer spectroscopy, the X-ray diffraction analysis, and electrochemical technique. Even extremely thin fluor-oligomeric films (down to 2 μg.cm–2) may sufficiently improve the corrosion resistance of ironVytauto Didžiojo universitetasŽemės ūkio akademij