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Tungsten Borides: On the Reaction of Tungsten with Boron(III) Bromide
Author(s) -
Henschel Anne,
Binnewies Michael,
Schmidt Marcus,
Köppe Ralf,
Burkhardt Ulrich,
Grin Yuri
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201801778
Subject(s) - tungsten , boron , materials science , crucible (geodemography) , chemical reaction , thermal stability , inorganic chemistry , bromide , chemical stability , metallurgy , chemical engineering , chemistry , computational chemistry , organic chemistry , engineering
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 W 2 B, WB and WB 2 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.