Ultra-hard abrasive particles
OwnerHenry B. Dyer, Geoffrey J. Davies +1inventors
InventorsHenry B. Dyer, Geoffrey J. Davies, Robert C. Burns
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Abstract
A synthetic diamond or cubic boron nitride particle is characterized by containing two or more stable isotopes of an element present in a ratio which is different to the ratio in which the isotopes exist in nature. The diamond or cubic boron nitride particle thus has a fingerprint. A preferred example of the element is nitrogen.
Claims12
A method of producing a synthetic ultra-hard abrasive particle selected from diamond and cubic boron nitride, said abrasive particle containing two or more stable isotopes of an element, said isotopes present in a ratio which is different than the ratio in which the isotopes exist in nature, said method comprising the steps of
- a) providing a reaction vessel containing a reaction mass comprising a source material, a catalyst/solvent for the abrasive particle and an element containing two or more stable isotopes present in a ratio different than that which exists in nature;
- and
- b) subjecting the reaction mass to conditions of elevated temperature and pressure at which the abrasive particle is crystallographically stable in the presence of the isotopes.
Dependencies are inferred from the claim text.