Novel “redox reaction” route for synthesis of faceted, microcrystalline coatings of tungsten, molybdenum and their composites

Faceted, microcrystalline coatings of tungsten, molybdenum and their composites are fabricated for the first time using a novel redox reaction route. The method uses a hot filament to initiate pyrolytic reactions in desired gas mixtures. The method offers many technologically useful features-e.g. high growth rates, and hence fabrication of very thick coatings; no hazardous precursors are needed; control of the morphology/composition of the composites-which are not offered by other conventional methods of thin film fabrication.