Fabrication of SiC Matrix Surface Composites by Chemical Vapor Infiltration with Microwave Heating: Temperature Effects

Microwave Combustion and Sintering Without Isostatic Pressure

“…It should be noted that the inverse temperature gradients could also be established by "seeding" the center (or one side) of the preform with a material which readily absorbs microwave energy. The following advantages of MCVI over the conventional CVI have been well demonstrated by several researchers (Devlin et al, 1993;Spotz et al, 1993;Day et al, 1994;Skamser et al, 1994): 1) relatively short processing time; 2) no limitations on the preform geometry; 3) products with spatially uniform and high density; deposition from the inside-out.…”

“…MCVI has been documented in the fabrication of A1203 fiberIAl203 matrix composites ) and the Sic fiber/SiC matrix composites (Deepak and Evans, 1993;Day et al, 1994). Idiltration of Si& in NicalonTM cloth (Devlin et al, 1993), Sic and 21-02 into reticulated Sic foam, Nicalonm cloth and ZrO;!…”

Microwave Combustion and Sintering Without Isostatic Pressure

“…MCVI has been documented in the fabrication of A1203 fiber/A1203 matrix composites ) and the SiC fiber/SiC matrix composites (Deepak and Evans 1993;Day et al 1994). Infiltration of Si3N4 in NicalonTM cloth (Devlin et al 1993), SiC and Zr02 into reticulated SiC foam, NicalonTM cloth and Zr02 based porous fiber boards (Yin et al 1997) were also experimentally demonstrated.…”