CVI matrix densification process

US11691924B2 · kind B2 · utility

Assignee

• RAYTHEON TECHNOLOGIES CORPORATION · US

Inventors

• Ying She · Town of East Hartford, US
• Nitin Garg · Reading, GB
• Andrew J. Lazur · Tecate Mission Road, US
• Olivier H. Sudre · Thousand Oaks, US

Key dates

• Filing date: Feb 21, 2020
• Grant date: Jul 4, 2023
• Expiry date: Mar 16, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/614
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed herein is a chemical vapor infiltration method including flowing ceramic precursors through a preform and depositing a matrix material on the preform at a first gas infiltration pressure, increasing the gas filtration pressure to a second gas infiltration pressure, and lowering the gas infiltration pressure to a third gas infiltration pressure which is intermediate to the first and second gas infiltration pressures.