Method of producing ultra-hard abrasive particles

US6979357B2 · kind B2 · utility

Assignee

• Mehmet Serdar Ozbayraktar · ZA

Inventors

• Robert Fries · Rosebank, ZA
• Iakovos Sigalas · Johannesburg, ZA
• Manfred Nebelung · Dresden, DE
• Geoffrey John Davies · Springs, ZA

Key dates

• Filing date: Nov 6, 2001
• Grant date: Dec 27, 2005
• Expiry date: Nov 6, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2203/068
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method of producing a plurality of discrete ultra-hard abrasive particles includes the steps of providing a plurality of granules, each comprising at least one ultra-hard abrasive particle, a precursor for the abrasive particle and a solvent/catalyst for the abrasive particle or precursor of such a solvent/catalyst, placing the granules with a separating medium between adjacent granules in the reaction zone of a high pressure/high temperature apparatus, subjecting the contents of the reaction zone to elevated temperature and pressure conditions at which the ultra-hard abrasive particle is crystallographically stable, recovering thus treated material from the reaction zone and removing the separating medium in the treated material to produce a plurality of discrete abrasive particles.