Shekhovtsov V. V.
1, Volokitin O. G.
1, Ushakov V. A.
2, Zorin D. A.
21Tomsk state university of architecture and building, Tomsk, Russia
2Moscow State University of Civil Engineering, Moscow, Russia
Email: shehovcov2010@yandex.ru, volokitin_oleg@mail.ru
Results of experimental studies of the synthesis of glass ceramics of the MgO-SiO2 system by plasma melting at the atmospheric pressure are presented. Electron microscopy data showed that, during the melt crystallization with the rate of 287-5 K/s, the surface morphology is represented by a dense packing of rhombic dodecahedral Mg2SiO4 crystals (without open porosity). In this case, the matrix is characterized by the formation of a dense framework with a clear linear arrangement of spherical inclusions corresponding to the MgSiO3 phase. As a result of the plasma melting synthesis, glass ceramics with the density of 3.56 g/cm3 and microhardness of up to 15 GPa was obtained. It is assumed that glass ceramics with such a composition can be considered as an excellent option for the development of a cost-effective high-quality refractory. Keywords: forsterite, glass ceramics, electric arc synthesis.
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