Surface hardened carbon material and process of manufacturing

Details Surface hardened carbon material and process of manufacturing Surface hardened carbon material and process of manufacturing

2006-06-20

2006-06-20

Turner, Archene (Department: 1775)

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

Reexamination Certificate

active

07063891

ABSTRACT:
A carbon material is formed by heat-treating a carbonaceous material in a reaction mix of oxides of boron and boron nitride in a nitrogen atmosphere to temperatures of 1600 to 2000° C. The surface of the carbonaceous material is transformed into a carbon material that is resistant to oxidation to temperatures of 900° C., enabling machined components to be utilized for weeks at that temperature. The carbon material is also stable in inert or vacuum environments to temperatures in the range of 1500 to 2000° C., enabling its use as aluminum evaporative boats and the like.

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