Molded metal carbide-boride refractory products
AssigneeMax-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
InventorsGunter Petzow, Heinrich Hofmann, Kurt Weiss
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Abstract
Boron carbide/transition metal boride molded articles produced by hot preng a mixture of from 25 to 75% by weight of boron carbide, from 14 to 40% by weight or boron, from 10 to 50% by weight of tungsten and/or titanium carbide, from 0 to 6% by weight of cobalt and from 0 to 8% by weight of silicon to convert the carbide into the corresponding boride.
Claims11
Multiphase hard metal alloy articles consisting essentially of 65-85 volume percent of boron carbide and 34-15 volume percent of tungsten boride, or a combination of tungsten boride and titanium boride in a volume ratio of 3:1 to 2:1 produced by the process comprising intimately contacting a mixture of
- from 25 to 75% by weight of finely divided boron carbide,
- from 15 to 40% by weight of amorphous boron,
- from 10 to 50% by weight of tungsten carbide or a combination of tungsten carbide and titanium carbide,
- from 0 to 6% by weight of cobalt, and
- from 0 to 8% of finely particulate elemental silicon, and hot pressing the powder so obtained at between 1550.degree. C. and 1850.degree. C.
Dependencies are inferred from the claim text.