Influence of additives of Al2O3 on properties of aluminum nitride-based ceramic

The properties of AlN-based materials with additives of 5–50 mass% Al₂O₃ are investigated. It is established that addition of Al₂O₃ to AlN increases the oxidation resistance of the materials as well as their mechanical strength and thermal resistance while preserving their electroinsulating properties and corrosion resistance to molten metals. AlN-Al₂O₃ composites may be used in high-temperature technology as refractory materials, electrical insulators, as well as radio-transparent materials.     

Effects of initial powder vibrogrinding on the properties of AlN - BN composites

A study has been made on the effects of initial vibroground powders with various grain sizes on the properties of AlN - BN composites. As the specific surface of these powders increases, so do the density, mechanical strength, and thermal resistance of the composites.     

Effect of Pulsed Laser Radiation on the Properties of Resistive Thick Films Based on Nickel and Barium Borides

We have used atomic force microscopy to study the surface morphology of resistive thick films based on powders of nickel and barium borides and a glass binder, treated with laser radiation. We used x-ray phase analysis to study the phase composition of these films. We have observed a change in the surface morphology, the phase composition, and the electrical resistance of the studied films as a function of the laser radiation energy.     

Effect of Magnetic Abrasive Finishing on the Chemical and Phase Composition of TiC Coatings on VK8 Alloy

Using x-ray diffraction analysis and electron-probe microanalysis, we have studied TiC coatings obtained by chemical vapor deposition, where the base and subsequently the coating have undergone magnetic abrasive finishing. We have found that treating the base before the coating is deposited prevents an η phase (Co₆W₆C) from forming in the surface layer of coated platelets. Magnetic abrasive finishing (MAF) has been found to cause an α → β transition in the cobalt phase.     

Structure and properties of resistive thick films after laser treatment

We have studied the influence of laser radiation on the structure and electrophysical properties of resistive thick films based on BaB₆-LaB₆ solid solution. It has been shown that, in the course of laser treatment in the millisecond range, barium and lanthanum diffuse into the substrate, and micro-and nanosecond laser radiation leads to the breakup of current-conducting chains and the formation of domains with discrete structure. We have carried out a differential analysis of voltampere characteristics and determined the temperature dependences of electrical resistance R and resistance temperature coefficient. Laser treatment in the micro-and nanosecond ranges slightly increases the electrical resistance, which can be used for the precision treatment of thick films. __________ Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 43, No. 6, pp. 79–85, November–December, 2007.     

Oxidation of zirconium diboride and carbide in radiant heating

Translated from Poroshkovaya Metallurgiya, No. 1(313), pp. 72–75, January, 1989.     

Structure of silicon carbide powders produced in interaction of silica with carbon black

Translated from Poroshkovaya Metallurgiya, No. 7(355), pp. 47–52, July, 1992.