![]() ![]() The remaining interim material is then hot pressed to form a silicon carbide fiber-reinforced celsian (BAS) glass-ceramic matrix composite which may be machined to size. The 'green' composite is then heated to an elevated temperature to burn out organic constituents. This tape-mat stack is warm pressed to produce a 'green' composite. The matrix tapes and the fiber mats are alternately stacked in the proper orientation. Continuous CVD-SiC fibers are formed into mats of the desired size. ![]() The slurry is cast into tapes which are cut to the proper size. A slurry of BAS glass powders is prepared and celsian seeds are added during ball melting. Method of producing a ceramic fiber-reinforced glass-ceramic matrix compositeĪ fiber-reinforced composite composed of a BaO-Al2O3-2SiO2 (BAS) glass ceramic matrix is reinforced with CVD silicon carbide continuous fibers. The fibers improve the mechanical strength and fracture toughness and with the matrix provide superior dielectric properties. (Inventor)Ī hyridopolysilazane-derived ceramic fiber reinforced monoclinic celsian phase barium aluminum silicate glass-ceramic matrix composite material is prepared by ball-milling an aqueous slurry of BAS glass powder and fine monoclinic celsian seeds. The remaining interim material is then hot-pressed to form a BSAS glass-ceramic fiber-reinforced composite.Ĭeramic fiber-reinforced monoclinic celsian phase glass-ceramic matrix composite materialīansal, Narottam P. This tape-mat stack is warm-pressed to produce a 'green' composite which is heated to burn out organic constituents. Mats of continuous chemical vapor deposition (CVD)-SiC fibers are alternately stacked with these matrix tapes. Materials strong and tough, exhibit low dielectric properties, and endure high temperatures.Ĭeramic fiber reinforced glass-ceramic matrix compositeĪ slurry of BSAS glass powders is cast into tapes which are cut to predetermined sizes. Glass-ceramic matrix reinforced fiber composite materials developed for use in low dielectric applications, such as radomes. ![]()
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