Sintered composite abrasive materials, a process for its production and its use

US5194073A · kind A · utility

Assignee

• Hermann C. Starck Berlin GmbH & Co. KG · DE

Inventors

• Gerhard Winter · Dossenheim, DE
• Paul Moltgen · Laufenbürg, DE
• Dietmar Fister · Waldbröl, DE

Key dates

• Filing date: Nov 8, 1991
• Grant date: Mar 16, 1993
• Expiry date: Nov 8, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K3/1418
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Sintered composite abrasive material useful in abrasives (grinding wheels, abrasive discs and paper, etc.) and cutting tools, comprising an .alpha.-Al.sub.2 O.sub.3 matrix of sub-micron crystallite size made by sol-gel processing with a dispersed phase therein of mechanically resistant material, preferably essentially isotropic grains, added directly to the sol or gel stage of matrix formation.