A PROCESS FOR PREPARATION OF FIBER REINFORCED CARBON-SILICON CARBIDE (C-SIC) COMPOSITE

摘要

The present disclosure provides a process for preparation of uni-directionally aligned fiber reinforced carbon-silicon carbide (C-SiC) composite. The fiber reinforced carbon-silicon carbide (C-SiC) composite is formed by a process that includes (a) impregnating a fibrous preform with a resin solution to obtain a resin coated fibrous preform, (b) curing and pyrolysis of the resin coated fibrous preform to obtain a carbon coated fibrous preform, (c) impregnating the carbon coated fibrous preform with a polycarbosilane resin to obtain a polycarbosilane coated preform, (d) curing the polycarbosilane coated preform to obtain a dimensionally stable preform, (e) pyrolyzing the dimensionally stable preform to obtain a carbon-silicon carbide (C/SiC) composite. The composite is further densified with polycarbosilane by repeating the above steps (c) to (e) for one or more times to obtain uni-directionally aligned continuous fiber reinforced carbon-silicon carbide (C-SiC) composite of density in the range of 1.9-2.0g/cc with a bending strength up to 450 MPa. The product of the above process possesses multifunctional properties for use in various high performance applications.