The effect of heat treatment (ageing) on the microstructure and property of SPN14A7M5/TiC materials produced by overlay laser welding has been studied. The optimum conditions of ageing are found. 

Injection forming process for mixtures of polymer melts with «Metal Ingection Molding» (MIM) metal powders, which are successfully applied abroad for serial production of small-size parts of complex shape, is presented. Its distribution in Russia is retarded because of lacking the production of do- mestic granules of initial powder mixture with plastic binder. The results are described concerning the development of compositions and granulate production process in the laboratory conditions for the MIM-process using domestic raw materials: carbonyl iron powder and binder based on poly- formaldehyde with additives of paraffin, stearic acid and LP & HP polyethylene. 

The work is devoted to studying the mechanical characteristics of diamond-drilling-tool matrix. The infiltration method at temperature of 1100–1150 °C for 15 min in hydrogen medium was used for production of model diamond-containing and diamond-free samples of 24×7×8 mm matrices of two types, which differ in the contents of nickel and cast tungsten carbide, namely WС–Co–Cu (1) and WС–Со–Cu–Ni + cast tungsten carbide (2). Dia- monds A8K160 (500/400 μm), AC50 (500/400 μm) and SDB1125 (30/40 mesh, i. e. 600/425 μm) were used as filling materials - their density in matrix was 9 vol.%. Bending strength, hardness, density, porosity, and abrasive resistance of drilling tool matrix samples have been measured. It is found that WС–Со–Cu–Ni matrix samples have higher hardness and abrasive resistance as compared with WС–Со–Cu, these characteristics are explained by existence of nickel and cast tungsten carbide solids in them. Introduction of diamonds in the matrices results in sugnificant increase in their hardness (by 8–10 HRC units), distorting the hardness measured data of matrices in diamond layer of crown bits. 

The article describes the investigation of reaction mix combustion kinetics and mechanisms as well as to producing ceramic materials in the Mo–Si–B ternary system by SHS method. For mixes enriched by silicon, the driving force of the SHS-reaction is shown to be silicon fusion, produced melt sprea- ding over the surface of molybdenum and boron solid particles with dissolution of the latter in it and formation of Mo3Si intermediate silicide film. The subsequent silicon diffusion in molybdenum results in occurrence of MoSi2 grains, thus molybdenum boride grains are formed as a result of mo- lybdenum diffusion into the melt. In the compositions with high boron content and low silicon fraction, MoB formation can carry by means of gas- phase mass transfer of МоО3 suboxide to boron particles. Investigations of chemical transformation succession have been carried out in combustion wave. The obtained data testify of the possibility of parallel and subsequent flowing of molybdenum silicide and boride formation reactions, this sti- pulates the combustion transfer from fusion mode to detachment mode and vice versa. In the detachment mode, molybdenum silicide formation re- action is leading one, and molybdenum boride formation occurs with short time detachment. Using the power SHS-compaction, targets for magne- tron deposition are produced. 

The parameters and products of combustion of porous granulated batch consisting of Ti + C + cellulose nitrate with addition of KCl, NaCl or K2CO3 salts or/and С6Н8Cl14 perchlorinated resin have been investigated allowing for evolved impurity gas filtration. The effect of these components is shown and structured titanium carbide powder formation conditions are found. 

The SHS-hydrogenetion process of titanium sponge has been investigated under the conditions of hydrogen deficiency and excess. Using the time- of-flight mass spectrometry, H+ non-uniform distribution thorugh the sponge volume during synthesis under the conditions of H2 deficiency and H+ uniform distribution under the conditions of H2 excess is obtained. The compositions of the hydrogenated sponge are accordingly TiH1,5 + Ti and TiH2. The structure of Ti-sponge surface before and after SHS-hydrogenetion is compared by SEM. Increase in hydrogenated sponge structure foliation ir- respective of H2 contents is observed as compared with the initial sponge. The layers acquire correct geometric shape; they are arranged in a certain order, which motive is iterated. Distances between layers vary from micrometer ones to nanosized ones. The phase formation mechanism during ti- tanium hydrogenation is studied by time-resolved X-ray diffraction. Finished product formation passes through a number of intermediate phases ac- cording to solid-phase mechanism: α-Ti α-Ti[H] β-Ti[H] TiH2. 

The shape, dimension, and microhardness of Al-2Cu-1,6Mn-0,4Zr (wt. %) based composite material powders hardened by nanodiamond particles in amount of 0–10 vol. % depending on mechanical alloying duration have been investigated. The maximum run time in planetary ball mill is 15 h. Mean pellet size of composite materials obtained with the use of chip matrix particles of 1000 μm in size is shown to decrease up to 30 μm when mechani- cal alloying time increases. In the course of mechanical alloying the material microhardness rises to 270–320 HV. 

The results of investigation of the structural-phase condition and microhardness of eutectic silumin exposed to low-energy high-intensity electron streams and compression plasma flows are presented. As a result of such treatment the near-surface layer up to 55 μm thick with dispersed cellular- dendrite structure and improved mechanical characteristics is formed. The comparative analysis of the effect of the parameters and treatment type on the surface layer structure is carried out. 

Nanopowders essentially differ in their properties from atoms, molecules and volume materials; they are used for development of new materials and instruments realizing their new properties. However under unfavorable working conditions and non-observance of safety instructions they affect the human body causing professional pathology. An investigation of the effect of mechanical activation on the performances of aluminum oxide powders produced by various methods, and on the properties of alumina ceramic on their basis has been carried out. Specific physical and chemi- cal properties of mechano-activated nanodispersed α-Al2O3 powders in comparison with larger particles can comprise unexpected risks for safety: aggregative state, volatility, reactive capacity, size, shape, structure, surface area, degree of purity, flammability and explosibility, ability to collect in a human body. Norms of the safe contents of nanoparticles in the environment (air) of the working area have been developed. 

TiAlSiCN and TiAlSiCN/MoSeC coatings have been produced by magnetron sputtering of segmented SHS- and compacted powdered targets. The struc- ture and composition of the coatings have been investigated by X-ray phase analysis, X-ray photoelectron spectroscopy, Raman spectroscopy, trans- mission electron microscopy, and light spectroscopy. The base of TiAlSiCN coating composes of FCC-phase with crystallites of < 15 nm in size; in sput- tering of TiAlSiCN and MoSeC segments in 3 : 1 ratio, decrease of crystallites size takes place and in 2 : 2 ratio does the amorphisation. MoSe2 phase is found also in TiAlSiCN/MoSeC coatings. It follows from the results of nanoindentation that hardness of TiAlSiCN coatings is 40 GPa, TiAlSiCN/MoSeC coatings – 28 GPa and 12 GPa at 3 : 1 and 2 : 2 ratios respectively. The coefficient of friction of TiAlSiCN coatings is 0,75 at ambient temperature, after in- troduction of MoSeC it drops to 0,05; wear resistance of coatings raises as well. In tribological tests of TiAlSiCN/MoSeC coatings with continuous heat- ing, low coefficient of friction (< 0,1) is unchanged up to 300 °C. 

The optimum parameters of thermal-diffusion copper plating of chromium-nickel steels in salt melt of the CuCl–KCl–ZnCl2 composition are experi- mentally found. The coating thickness is dependent of temperature-time mode of processing and controlled by competing processes of dissolution of the surface layer and oncoming copper deposition. As a result of completed complex metal-physical researches it is shown that copper coating of required morphology with specified technological properties is formed on the surface of samples.