Ceramic matrix composites, and methods and systems for making same

A method for preparing a ceramic matrix composite, comprising

• (a) providing reinforcing fiber for impregnation;
• (b) heat treating the reinforcing fiber;
• (c) impregnating the heat treated reinforcing fiber with a composition comprising a ceramic matrix forming polymer to form a fiber reinforced, ceramic matrix forming polymer pre- preg, wherein impregnating comprises introducing the heat treated reinforcing fiber to an impregnation device having a first impregnation roller and a second impregnation roller, wherein the first and the second impregnation rollers are situated so that the heat treated reinforcing fiber passes through a nip between the first and the second impregnation rollers and so that the heat treated reinforcing fiber is contacted with the composition comprising the ceramic matrix forming polymer on a top and a bottom surface thereof, and wherein the composition comprising the ceramic matrix forming polymer has a high viscosity of at least about 60,000 centipoise;
• and
• (d) heat molding the reinforcing fiber, ceramic matrix forming polymer pre-preg to form a molded ceramic matrix composite article.