Diborides of transition metals: Properties, application and production. Review. Part 1. Titanium and vanadium diborides

The properties, applications and methods for producing titanium vanadium diborides are considered. These oxygen-free refractory metal-like compounds. As a result, they characterized by high values of thermal electrical conductivity. Their hardness is relatively high. Titanium exhibit significant chemical resistance in aggressive environments. For these reasons, have found application modern technics. So, used as surfacing materials when applying wear-resistant coatings on steel products. It also possible to use diboride catalyst organic synthesis the anode renewable electrochemical current sources. Perspective ceramics B 4 C – TiB 2 VB , which make it obtain products based boron carbide with high-quality performance characteristics, particular, increased crack resistance. Such composite obtained means hot pressing, spark plasma sintering pressureless sintering. properties compounds depend content impurities dispersion. Therefore, solve specific problem associated compounds, important choose method their preparation correctly, determine admissible starting components. This leads presence different borides. main are: from simple substances (metals boron); borothermal reduction oxides; carbothermal (reduction mixtures metal oxides carbon; metallothermal boron; carbide-boron reduction. Plasma-chemical (deposition vapor-gas phase) nanopowders. Each article.