Self-propagating high temperature synthesis of TiB2–MgAl2O4 composites

Abstract

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 Co 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.

Original language	English
Article number	295
Journal	Metals
Volume	7
Issue number	8
DOIs	https://doi.org/10.3390/met7080295
Publication status	Published - 3 Aug 2017

Keywords

Alumina-magnesia spinel
Composites
Self-propagating high-temperature synthesis
Titanium diboride

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.3390/met7080295

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title = "Self-propagating high temperature synthesis of TiB2–MgAl2O4 composites",

abstract = "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 Co 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.",

keywords = "Alumina-magnesia spinel, Composites, Self-propagating high-temperature synthesis, Titanium diboride",

author = "Nina Radishevskaya and Olga Lepakova and Natalia Karakchieva and Anastasiya Nazarova and Nikolai Afanasiev and Anna Godymchuk and Alexander Gusev",

year = "2017",

month = aug,

day = "3",

doi = "10.3390/met7080295",

language = "English",

volume = "7",

journal = "Metals",

issn = "2075-4701",

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AU - Radishevskaya, Nina

AU - Lepakova, Olga

AU - Karakchieva, Natalia

AU - Nazarova, Anastasiya

AU - Afanasiev, Nikolai

AU - Godymchuk, Anna

AU - Gusev, Alexander

PY - 2017/8/3

Y1 - 2017/8/3

N2 - 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 Co 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.

AB - 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 Co 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.

KW - Alumina-magnesia spinel

KW - Composites

KW - Self-propagating high-temperature synthesis

KW - Titanium diboride

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Self-propagating high temperature synthesis of TiB₂–MgAl₂O₄ composites

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Keywords

ASJC Scopus subject areas

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