ZONE INFILTRATION METHOD OF FORMING A SILICON CARBIDE BODY

摘要

RD-21,824 A method for infiltrating a porous carbonaceous preform with a silicon or silicon alloy infiltrant to form a silicon carbide body is disclosed. An assembly is formed of the preform and an infiltration means for bringing the infiltrant into contact with the preform at least along a traversing dimension of the preform. A zone in the assembly is heated in an inert atmosphere or partial vacuum to an infiltration temperature that provides for wicking of the infiltrant into a section of the preform in the zone. The heating zone traverses the assembly along the traversing dimension. A silicon carbide body is formed from reaction of the infiltrant with the preform.