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Tungsten Borides: On the Reaction of Tungsten with Boron(III) Bromide

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Henschel,  Anne
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Binnewies,  Michael
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schmidt,  Marcus
Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Burkhardt,  Ulrich
Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Grin,  Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Henschel, A., Binnewies, M., Schmidt, M., Koeppe, R., Burkhardt, U., & Grin, Y. (2018). Tungsten Borides: On the Reaction of Tungsten with Boron(III) Bromide. Chemistry – A European Journal, 24(40), 10109-10115. doi:10.1002/chem.201801778.


Cite as: http://hdl.handle.net/21.11116/0000-0001-E288-6
Abstract
The crucible-free reaction between heated tungsten wires and gaseous boron tribromide yields different tungsten borides. The experiments were carried out at various reaction temperatures and times, revealing the formation of W2B, WB and WB2 phases. The underlying reactions were analyzed by using thermodynamic model calculations. The stability of the gaseous tungsten bromides was evaluated using quantum chemical methods. While the developed synthesis of phase-pure borides is only possible to a limited extent, it offers a potential route for a formation of protective coatings with high chemical and thermal resistance.