Patent · US Active

Densification of C-C composites with pitches followed by CVI/CVD

US8268207B2 · kind B2 · utility

2Cited by

19References

17Claims

0Family size

Assignee

HONEYWELL INTERNATIONAL INC. · US

Inventors

Mark L. La Forest · Granger, US
Neil Murdie · Granger, US
Allen H. Simpson · Buchanan, US

Key dates

Filing date	Mar 9, 2011
Grant date	Sep 18, 2012
Priority date	—
Expiry date	Mar 9, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/77
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of manufacturing pitch-based carbon-carbon composite useful as a brake disc, includes (a) providing annular carbon fiber brake disc preform; (b) heat-treating the carbon fiber preform; (c) infiltrating the carbon fiber preform with pitch feedstock by VPI or RTM processing; (d) carbonizing the pitch-infiltrated carbon fiber preform; (e) repeating steps (c) and (d) to achieve a density in the carbon fiber preform of approximately 1.5 g/cc to below 1.7 g/cc; and (f) densifying the preform by CVI/CVD processing to a density higher than 1.7 g/cc. Employing lower cost VPI and/or RTM processing in early pitch densification cycles and using more expensive CVI/CVD processing only in the last densification cycle provides C-C composites in which the pitch-based components resist pullout, resulting in a longer wearing composite.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.