SELF– PROPASETING HIGH TEMPERATURE SYNTHESIS – BORON- CONTAINING MILTI-FUNCTIONALCOMROSITE MATERIALS
Keywords:
self-propagating high-temperature synthesis,, borate ore,, refractory powder,, mechanical activation,, magnesium diborideAbstract
The possibility of using Inder borate deposits of the Republic of Kazakhstan as a boron–containing component in the preparation of powders of refractory borides of transition metals by SHS method was shown. Optimal compositions and conditions of SH–synthesis of nanosized powders of titanium and chromium borides were designed. It was found that the use of mechanical pre–activation promotes the formation of nanosized particles of titanium and chromium borides. The high pressure installation is synthesized the superconducting composite that based on magnesium diboride. The results of investigations effect of doping additives (in the form of micro–particles of copper oxide) on the value of the current density and the transition temperature to the superconducting state.
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