Wear resistance in carbon fiber friction materials
US6691393B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Mar 27, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49801
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Carbon fiber brake preforms (20), specifically, annular discs built up of fabric arc segments (21) composed of continuous fibers (25) and staple fibers (26). Most of the continuous fibers (25) in the fabric segments (21) are arranged to be located within 60° of radially from the inner diameter to the outer diameter of the annular disc (20). The fabric arc segments have substantially all of their continuous fibers oriented in the radial direction and parallel to the segment arc bisector, or the segments are arranged in alternating layers in which, respectively, half the continuous fibers are oriented at a +45 degree angle with respect to the segment arc bisector and half the continuous fibers are oriented at a −45 degree angle with respect thereto. Methods for making preform composites comprise providing needle-punched nonwoven fabric of unidirectional continuous fibers and staple fibers, making a plurality of fabric segments, arranging the segments in a multilayered intermediate, heating the multilayered intermediate to convert the fibers to carbon, and densifying the carbonized product. In brake discs made as described, fiber pull-out is minimized, reducing mechanical we…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.