Properties of tungsten heavy alloys, prepared by spark-plasma sintering N S Ermakova, M S Yurlova and E G Grigoryev -Strength analysis of small-sized thin ceramic discs obtained by spark-plasma sintering E V Nefedova, V I Goltsev, E G Grigoryev et al. E-mail: azholnin@list.ruAbstract. A comparative study of the results of spark-plasma sintering (SPS) of two-types of aluminum oxide nanopowders, obtained by the method of conductor explosion and plasma synthesis. When the parameters of both powders are similar (spherical form of the particles, size, phase composition) as well as SPS modes the properties of the resulting compacts are significantly different both in mechanical properties and microstructure. The reason of differences in the properties of the obtained compacts is in technological impurities in powders, obtained by different methods. Artificial addition of impurities, contained in the nanopowder, obtained by electro explosion of conductor, into the powder, made by synthesis in plasma and not containing these impurities, allowed to reveal their effect on the formation of the microstructure and properties of the sintered by SPS method sample.

The aim of the work is to review publications on a narrow circle of composites, namely corundum graphene. Quite a lot of research has been devoted to this composite to conduct generalizations and identify patterns.

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The effect of sintering modes on the electrical conductivity of the corundum-graphene composite is investigated. The assumption about the nature of the electrically conductive structure and the conditions of its formation is substantiated.

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