Method for producing composites containing aluminum oxide, aluminum boride and aluminum, and composites resulting therefrom

摘要: A method for the preparation of ceramic composites containing at least aluminum oxide and boride, composite materials that result from method. Intimate mixtures finely-divided powdered metal anhydrous boric oxide, with ratios (by weight) about 0.5 to twenty parts one part are subjected a temperature cause complete reaction between starting materials. If ratio is above 1.25 resultant product will include in addition boride. The selected provide desired hardness toughness. Ratios 1 1.2 having highest hardness, greater amounts providing increased Several compositions described, hot pressing typically being used heating cycle. Typically, mixed powders pressed 1500 1600 degrees C. 45 minutes 6000 psi produce approaching 100% theoretical density. When additional strength desired, various reinforcing can be added base mixture, these fibers, whiskers platelets. have application as cutting tools, wear parts, armor, insualtion, etc. High yields achieved, inexpensive.