Differential needling of a carbon fiber preform

US10457016B2 · kind B2 · utility

Assignee

• HONEYWELL INTERNATIONAL INC. · US

Inventors

• Mark L. La Forest · Granger, US
• Neil Murdie · Granger, US
• Russell W. Johnson · Villa Park, US
• Mark C. James · South Bend, US

Key dates

• Filing date: Feb 23, 2016
• Grant date: Oct 29, 2019
• Expiry date: Mar 24, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2250/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A carbon-carbon composite preform including a plurality of layers including carbon fibers or carbon-precursor fibers, the layers include a first exterior layer defining a first major surface, a second exterior layer defining a second major surface, and at least one interior layer disposed between the first exterior layer and the second exterior layer, the at least one interior layer having a peripheral region that forms a portion of an outer surface of the preform. The preform includes needled fibers, where at least some needled fibers extend through two or more layers. The preform has an exterior region and a core region, where the exterior region includes at least the peripheral region of at least one interior layer. The needled fibers define a first needled fiber number density (NFND) in the exterior region and a second greater NFND in at least a portion of the core region.