Vitreous carbon material and process for making the same

Details Vitreous carbon material and process for making the same Vitreous carbon material and process for making the same

2006-12-25

2011-11-08

Johnson, Christina (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

In specific atmosphere

C264S044000

Reexamination Certificate

active

08052903

ABSTRACT:
A defect-free vitreous carbon material having a three-dimensional (x,y,z) size in which each of the x, y and z dimensions exceeds twelve millimeters. A process of making such vitreous carbon material employs a three-dimensional fiber mesh that vaporizes at elevated temperature, in which the mesh is impregnated with a polymerizable resin and thereafter the resin is cured. During the initial stage(s) of pyrolysis, the mesh volatilizes to yield a residual network of passages in the cured resin body that thereafter allows gases to escape during pyrolysis of the cured resin material to form the vitreous carbon product. As a result, it is possible to form defect-free vitreous carbon material of large size, suitable for use in structural composites, and product articles such as sealing members, brake linings, electric motor brushes, and bearing members.

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