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Metals 2017, 7(8), 295;

Self-Propagating High Temperature Synthesis of TiB2–MgAl2O4 Composites

Tomsk Scientific Centre SB RAS, Tomsk 634055, Russia
Physical-Technical Institute, Tomsk State University, Tomsk 634050, Russia
Department of Nanomaterials and Nanotechnologies, National Research Tomsk Polytechnic University, Tomsk 634050, Russia
Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology MISIS, Moscow 119991, Russia
Research Institute of Environmental Science and Biotechnology, G.R. Derzhavin Tambov State University, Tambov 392000, Russia
Author to whom correspondence should be addressed.
Received: 27 June 2017 / Revised: 25 July 2017 / Accepted: 27 July 2017 / Published: 3 August 2017
(This article belongs to the Special Issue Titanium Alloys 2017)
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Metal borides are widely used as heat-insulating materials, however, the range of their application in high-temperature conditions with oxidative medium is significantly restricted. To improve the thermal stability of structural materials based on titanium boride, and to prevent the growth of TiB2 crystals, additives based on alumina-magnesia spinel with chemical resistant and refractory properties have been used. The aim of this work is to study the structure of TiB2 with alumina-magnesia spinel additives obtained by self-propagating high-temperature synthesis (SHS). TiB2 structure with uniform fine-grained distribution was obtained in an MgAl2O4 matrix. The material composition was confirmed by X-ray diffraction analysis (DRON-3M, filtered Со kα-emission), FTIR spectroscopy (Thermo Electron Nicolet 5700, within the range of 1300–400 cm−1), and scanning electron microscopy (Philips SEM 515). The obtained material represents a composite, where the particles of TiB2 with a size of 5 µm are uniformly distributed in the alloy of alumina-magnesia spinel. View Full-Text
Keywords: titanium diboride; alumina-magnesia spinel; self-propagating high-temperature synthesis; composites titanium diboride; alumina-magnesia spinel; self-propagating high-temperature synthesis; composites

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Radishevskaya, N.; Lepakova, O.; Karakchieva, N.; Nazarova, A.; Afanasiev, N.; Godymchuk, A.; Gusev, A. Self-Propagating High Temperature Synthesis of TiB2–MgAl2O4 Composites. Metals 2017, 7, 295.

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