Abstract: An apparatus for the production of three-dimensional fiber-reinforced ceramics, which apparatus contains a foundation open at an upper end thereof and enclosing an empty space and a cylinder disposed on the foundation, the empty space of the foundation and an open space of the cylinder integrally forming a continuous empty space, and the continuous empty space having an empty region at a lowermost portion thereof having a filter plate set fast therein and having a pressure piston set fast above said filter plate to form between the pressure piston and the filter plate an empty region for accommodating a slurry for the production of the three-dimensional fiber-reinforced ceramics;wherein the filter plate contains a porous sintered metallic plate and a filter paper having holes not more than 0.3 .mu.

Abstract: A method for producing ceramics reinforced with three-dimensional fibers, which entails: a) setting a filter plate in contact with one surface of a three-dimensional fiber preform and a porous metallic plate in contact with said filter plate; b) setting a slurry in contact with a surface of the preform opposite to the one surface; c) exerting pressure on the slurry and, at the same time, subjecting the preform to vacuum aspiration through the filter plate, thereby obtaining a composite having an impregnated preform, the impregnation being effected in a single step; d) heating the composite; and e) firing the resultant composite.

Abstract: A fiber-reinforced ceramic composite material reinforced by particle dispersion with improved fracture toughness comprised of a mullite matrix, and fibers and same or different kind of ceramic fine particles both dispersed within the mullite matrix is produced by a method comprising: dispersing mullite particles forming a matrix in a solution dissolving an organometallic macromolecular substance to prepare an impregnating solution, continuously passing fibers through said impregnating solution to uniformly impregnate the fibers with said impregnating solution, laminating said fibers to provide a laminated body, converting the organometallic macromolecular substance within said laminated body into a nonmeltable state, and performing sintering (or press sintering) of said laminated body in an inert gas and/or nitrogen gas. By press sintering K.sub.Ic of 10 MN/m.sup.3/2 or more is achieved.

Abstract: A sintered article having a matrix of titanium diboride and a dispersed reinforcing phase of silicon carbide is produced by mixing titanium diboride powder and silicon carbide powder or whiskers, combining the resultant mixture with silicon boride, and sintering the produced mixture in a non-oxidative atmosphere under a pressure of at least 300 kg/cm.sub.2 at a temperature of at least 1,300.degree.C.

Abstract: A fiber-reinforced ceramic composite material reinforced by particle dispersion with improved fracture toughness comprised of a mullite matrix, and fibers and same or different kind of ceramic fine particles both dispersed within the mullite matrix is produced by a method comprising: dispersing mullite particles forming a matrix in a solution dissolving an organometallic macromolecular substance to prepare an impregnating solution, continuously passing fibers through said impregnating solution to uniformly impregnate the fibers with said impregnating solution, laminating said fibers to provide a laminated body, converting the organometallic macromolecular substance within said laminated body into a nonmeltable state, and performing sintering (or press sintering) of said laminated body in an inert gas and/or nitrogen gas. By press sintering K.sub.Ic of 10 MN/m.sub.3/2 or more is achieved.

Abstract: A band type strapping machine comprises a band feeding roller and a band returning roller wherein a first pressing roller is placed above the band feeding roller so as to be able to come in contact with the feeding roller, a second pressing roller is placed below the band returning roller so as to be able to come in contact with the returning roller and the band feeding roller and the band returing roller are driven in the same direction by a motor.

Abstract: A continuous carbon fiber reinforced SiC composite is produced by a method which comprises impregnating continuous carbon fibers coated with a SiC or titanium compound with a slurry mixture of silicon or a silicon compound with a thermosetting resin or a high-carbon caking agent, molding the impregnated continuous carbon fibers in a prescribed shape to obtain a shaped impregnated article, then curing the shaped article, heating the shaped article to obtain a carbon fiber-carbon composite having SiC or titanium compound, further impregnating liquid Si into the composite and heating the impregnated composite.

Abstract: A sintered composite having spinel reinforced with short fibers of silicon carbide is produced by preparing a slurry consisting of spinel powder, short fibers of silicon carbide, and a solvent, drying and pulverizing the slurry, and sintering the produced powder. The sintered composite produced as described above has silicon carbide homogeneously dispersed in a matrix of spinel and, therefore, possesses great strength and excels in toughness.