Gubarevich, A.V.; Yoshida, K. Fast Synthesis of Fine Boron Carbide Powders Using Electromagnetic Induction Synthesis Method. Powders2024, 3, 17-27.
Gubarevich, A.V.; Yoshida, K. Fast Synthesis of Fine Boron Carbide Powders Using Electromagnetic Induction Synthesis Method. Powders 2024, 3, 17-27.
Gubarevich, A.V.; Yoshida, K. Fast Synthesis of Fine Boron Carbide Powders Using Electromagnetic Induction Synthesis Method. Powders2024, 3, 17-27.
Gubarevich, A.V.; Yoshida, K. Fast Synthesis of Fine Boron Carbide Powders Using Electromagnetic Induction Synthesis Method. Powders 2024, 3, 17-27.
Abstract
Boron carbide (B4C) powders with defined stoichiometry, high crystallinity, minimal impurity content, and a fine particle size are imperative for realizing the exceptional properties of this compound in advanced high-technology applications. Nevertheless, achieving the desired stoi-chiometry and particle size using traditional synthesis methods, which rely on prolonged, high-temperature processes, can be challenging. The primary objective of this study is to syn-thesize fine B4C powders characterized by high crystallinity and a sub-micron particle size, em-ploying a fast, and energy-efficient method. B4C powders are synthesized from elemental boron and carbon in a high-frequency induction heating furnace using the Electromagnetic Induction Synthesis (EMIS) method. The rapid heating rate achieved through contactless heating promotes the ignition and propagation of the exothermic chemical reaction between boron and carbon. Additionally, electromagnetic effects accelerate atomic diffusion, allowing the reaction to be completed in an exceptionally short timeframe. The grain size and crystallinity of B4C can be finely tuned by adjusting various process parameters, including the post-ignition holding temperature and the duration of heating. As a result, fine B4C powders can be synthesized in under 10 minutes. Moreover, these synthesized B4C powders exhibit high resistance to oxidation when exposed to air.
Chemistry and Materials Science, Materials Science and Technology
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