The study covers some kinetic regularities observed in hydrogen reduction processes of nanodisperse and micron-size nickel powders in a rigid layer, in a layer subjected to high power travelling magnetic field, and in an eddy layer created by ferromagnetic bodies subjected to such field. The process kinetic parameters were calculated both under the linear heating and in isothermal conditions using the Freeman–Carroll and McKewan models, respectively. The properties of the original, intermediary and final products were examined using such methods as thermogravimetric analysis, X-ray diffraction, measurements of the specific surface area by low temperature nitrogen adsorption and scanning electron microscopy.

A variety of powdered aluminium and aluminium nitride fractions were obtained by the pneumatic circulation method. The aluminium powders have small particle sizes and low content of Аl2ОЗ·3Н2О. Processing the SHS-К and SHS-N aluminium nitride powders under the same operating conditions revealed significant difference in particles morphology which depends on the methods of obtaining these materials. For AlN particles the K form-factor value changes when processing from 20,5 for the original powder to 11,8 for the powder residue in the unit. Applying the pneumatic circulation method in order to obtain AlN powders reveals their morphology features and electrokinetic characteristics in the dispersion. The effect of pH on the zeta potential (ζ) of the AlN particles was determined. Changing the pH value for the AlN powder from 3 to 8 leads to changing the value ζ from +15 to –23 mV.

This paper shows the possibility to reinforce the Al/Al2O3 laminated cermet matrix with metal fibres of rapidly solidified alloys (steel, titanium, and aluminium), as well as with discontinuous duralumin chips. Several energy-intensive destruction mechanisms resulted in the maximum reinforcement effect achieved by using titanium and steel fibres with their content of 20 and 10 vol.%, respectively. The resulting composites have the following properties: ρ = 2,30÷2,85 g/cm3; σbend = 180÷250 MPa; K1s = 7,5÷15 MPa·m1/2 and KSU = (18÷35)·103 J/m2. The composite «Al/Al2O3 – Ccoke residue» has ρ = 2,21÷2,23 g/cm3 with a very low sliding friction coefficient of 0,17 (the counter-face was a ball made of Steel ShKh-15 loaded by 1 N). The oxide-adhesive type of bonding is formed in the «Al/Al2O3 – alumina grains» composite which allows removing spent grains from the grinding work zone and achieving the self-sharpening mode. The material containing kaolin fibres is an ultra lightweight (0,25–0,5 g/cm3) ceramic insulation with λ = 0,07÷ ÷0,2 W/(m·К) in the 20–1000 °C range. The material comprising alumina spherulites combines both relatively high hardness (σbend = = 10÷50 MPa) and porosity (42–52 %) with high thermal stability which is the result of rapid elimination of the temperature gradient from micron-size structure elements.

The paper presents the results obtained when studying the properties of copper electroplated coatings prepared at the L1-210 v2 (Italy) galvanizing plant using bright copper plating electrolyte by the «24 Carats» company (Moscow) and addition of the electroerosion copper nanopowder prepared by the electro erosion dispersion (EED) method from copper wire scrap in distilled water. An original unit developed by the authors (Russian Federation Patent 2449859) was used for EED conductors. Values of the friction coefficient and wear factor obtained in coatings tests at the Tribometer automated friction machine (CSM Instruments, Switzerland) showed no significant differences in wear resistance of samples. The hardness tests on sample surfaces were carried out using the DM-8 automatic micro hardness tester by the Micro Vickers method with the 25 g indenter load for 10 indentations with random indentation points in accordance with GOST 9450-76. Indenter loading time was 15 seconds. It was found that microindentation hardness of the copper coating with added copper nanoparticles is 15% higher than that of the steel substrate and the sample with the standard copper coating.

The study determines the technological mode of plasma electrolytic treatment (PET) processes for the VT6 (Ti-6Al-4V) and VT1-0 titanium alloys allowing to obtain SiO2-based amorphous black decorative coatings on their surfaces at high speed (>5 μm/min at 10 A/dm2 AC density). The coating applied to the VT6 alloy increases its wear resistance more than twice. The mechanism of black decorative coating formation on titanium alloys is proposed. It is based on the obsidian formation due to rapid solidification of the SiO2 melt and the penetration of small vanadium oxide amounts into the amorphous SiO2-based coating. While decorative black coating on the VT6 alloy is obtained due to the presence of vanadium oxide (4,3 %) in the obsidian-based coating, in order to create the coating of the same decorative colour on the VT1-0 alloy it is necessary to introduce sodium vanadate into aqueous solution during the plasma electrolytic treatment.

The study covers transformation of the structure, phase and chemical composition in the Al–Ni and Al–Ni–Cr coatings obtained by the diffusion interaction under the heat treatment of the impact bonded 12Kh1MF+NP2+AD1 and 12Kh1MF+Kh20N80+AD1 laminated composites. It was found that increasing the hold time at 1100 °C leads to the stabilization of chemical composition in the surface coating accompanied by the increase of nickel and decrease of aluminium proportion. It was shown that redistribution of aluminium within the diffusion coating during the temperature impact is slower in the Al–Ni–Cr system than in the binary Al–Ni system.

The study covers microstructure and mechanical properties of 4 matrices with complex chemical composition: VK15–Cu, VK15–Cu–Sn, VK20–Cu, and VK20–Cu–Sn used in the production of diamond drilling tools. The sample matrices was produced by infiltration of hard-metal mouldings with copper at t = 1100 °C and with bronze at t = 1000 °C. Thin sections of diamond-free matrices were prepared, their metallographic and microprobe analyzes were made, their hardness, micro-hardness, density and porosity were found. The hardness of matrices was measured according to the HRC scale, their microhardness was measured using the PMT-3 device under the 2N load. As a result it was revealed that 1) infiltration of the VK15 and VK20 hard-metal mouldings with copper and brass based melts produces hard and strong matrices for diamond tools with maximum 3 % apparent porosity, and the infiltration process is more complete when using bronze; 2) the most hard are the matrices obtained by infiltration of the VK15 hardmetal mouldings with bronze. The use of the VK20 hard-metal based mouldings matrices when manufacturing diamond drilling tools is inadvisable because of the sharp decrease in its abrasive capacity when drilling hard materials.

The article is devoted to the fabrication technology of wares from porous powder materials by filling the metal matrix with various fillers under the effect of ultrasonic waves. Diffusion mechanisms of solid particles of the filler into the pores of the powder material in various cases of particle motion are considered. The mechanical description of particle-motion mechanism in the case of influence of gravity impact and under the joint influence of gravity and ultrasound is presented and filling the pores by solid particles of the infiltrating suspension is interpreted.

6 марта 2016 года на 83-м году ушел из жизни выдающийся ученый в области порошковой металлургии и материаловедения, академик РАН, основатель кафедры порошкового материаловедения и Научного центра порошкового материаловедения Пермского национального исследовательского политехнического университета (ПНИПУ), почетный гражданин города Пермь, талантливый педагог, замечательный и отзывчивый человек – Владимир Никитович Анциферов.