초록 ▼

A silicon carbide fiber reinforced barium modified magnesium aluminosilicate matrix composite is described having high strength and thermal stability at temperatures in excess of 1200°C. The matrix material contains about 5% to about 14% magnesium oxide and about 5% to about 25% barium oxide. While

A silicon carbide fiber reinforced barium modified magnesium aluminosilicate matrix composite is described having high strength and thermal stability at temperatures in excess of 1200°C. The matrix material contains about 5% to about 14% magnesium oxide and about 5% to about 25% barium oxide. While any suitable ratios of fiber to matrix can be used, the composite for most applications for example, in the heat engine area, will contain approximately 20% to 50% by volume silicon carbide fibers.

대표청구항 ▼

A method of forming silicon carbide fiber reinforced glass-ceramic matrix composites comprising hot pressing a mixture of about 15% to about 70% by volume of silicon carbide fibers in a glass powder matrix consisting essentially of: ________________________________ -MgO 5-15% As2O3 0.5-3% Al2O3 20-4

A method of forming silicon carbide fiber reinforced glass-ceramic matrix composites comprising hot pressing a mixture of about 15% to about 70% by volume of silicon carbide fibers in a glass powder matrix consisting essentially of: ________________________________ -MgO 5-15% As2O3 0.5-3% Al2O3 20-40% Nb2O5 0-10% SiO2 40-60% Ta2O5 0-10% BaO 5-15% ________________________________ at about 1200°C. to about 1500°C., followed by heating the hot pressed composite at about 1100°C. to about 1200°C. for about 24 hours to about 60 hours resulting in a composite with high strength and thermal stability at temperatures in excess of 1200°C.