Method of making ceramic composite bearings

US10478996B1 · kind B1 · utility

Assignee

• Lancer Systems LP · US

Inventors

• Timothy J. Edwards · Austin, US
• Terry A. Herb · Harleysville, US
• Joseph Braza · Simsbury, US
• Robert D. Cook · Collegeville, US
• Kyle Anthony Miller · Everett, US
• Lukas P. Millard · Red Hill, US
• Christopher Corrado · Hatfield, US

Key dates

• Filing date: Dec 30, 2016
• Grant date: Nov 19, 2019
• Expiry date: Oct 31, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2237/84
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for forming a ceramic matrix composite bearing includes preparing a layup slurry from a mixture of water, pre-ceramic polymer and refractory filler. The method further includes forming a concentric stack of slurry-impregnated fabric sleeve layers over a rod-shaped inner mold and applying an outer mold to form a mold assembly. The method also includes heating the mold assembly to form a tubular green body and rough cutting the green body to bearing length. In addition, the method includes heat-treating the bearing and performing a polymer infiltration and pyrolysis treatment. The method further includes conducting dimensional stability treatment processes on the bearing and final grinding and machining to meet pre-determined specifications.