A method for manufacturing a silicon carbide powder according to the embodiment includes forming a mixture by mixing a silicon (Si) source containing silicon with a solid carbon (C) source or a C source containing an organic carbon compound; heating the mixture; cooling the mixture; and supplying hydrogen gas into the mixture.

A method for manufacturing a silicon carbide powder according to the embodiment includes forming a mixture by mixing a silicon (Si) source containing silicon with a solid carbon (C) source or a C source containing an organic carbon compound; heating the mixture; cooling the mixture; and supplying hydrogen gas into the mixture.

A general procedure applied to a variety of sol-gel precursors and solvent systems for preparing and controlling homogeneous dispersions of very small particles within each other. Fine homogenous dispersions processed at elevated temperatures and controlled atmospheres make a ceramic powder to be consolidated into a component by standard commercial means: sinter, hot press, hot isostatic pressing (HIP), hot/cold extrusion, spark plasma sinter (SPS), etc.

A general procedure applied to a variety of sol-gel precursors and solvent systems for preparing and controlling homogeneous dispersions of very small particles within each other. Fine homogenous dispersions processed at elevated temperatures and controlled atmospheres make a ceramic powder to be consolidated into a component by standard commercial means: sinter, hot press, hot isostatic pressing (HIP), hot/cold extrusion, spark plasma sinter (SPS), etc.

A nuclear reactor structure configuring a pebble accommodating space of a pebble bed type nuclear reactor includes a core material including graphite and a ceramic/ceramic composition material covering a surface of the core material. According to a core material processing step (A) of processing the core material including graphite into a quadrangular prism, a bottom surface of which is an approximately isosceles trapezoid, a step (B) of obtaining a base material by covering the core material with an aggregate including a ceramic fiber, and a CVD step (C) of putting the base material into a CVD reactor and forming a SiC matrix in gaps of the aggregate, thereby forming a ceramic/ceramic composite material on a surface of the core material, the nuclear reactor structure capable of enhancing durability, preventing cracking, etc. from occurring, and preventing exposure of graphite as the core material from occurring, can be provided.

A ceramic gas injector and method of fabrication are described. The gas injector has an inlet portion to which a gas is introduced via an inlet hole and contains a conformal channel between the inlet hole and a sidewall, an outlet portion from which the gas is provided from the gas injector and a collar disposed between the inlet and outlet portions. The channel extends into the collar. The channel has channel sections each of which extends through the inlet portion and terminates at both inlet ends before reaching the inlet face and collar ends before reaching the outlet portion. Alternating adjacent pairs of channel sections are connected via the inlet ends with adjacent pairs that are not connected via the inlet ends connected via the collar ends. Ports in a sidewall of the collar are connected with an adjacent pairs of sections not connected via the inlet ends.

Compositions and methods directed to the synthesis and use of silicon carbide with, biomedical applications is provided. The method of synthesis includes providing a polydimethysiloxane (PDM'S) substrate, and irradiating at least a portion of the substrate with a laser under conditions sufficient to produce silicon carbide comprising 3C silicon carbide (3C-SiE). The composition can be used to modulate biological activity through electrical, chemical and heat stimuli.

A complex composite particle is made of a coal dust and binder composite that is pyrolyzed. Constituent portions of the composite react together causing the particles to increase in density and reduce in size during pyrolyzation, yielding a particle suitable for use as a proppant or in a composite structure.

A complex composite particle is made of a coal dust and binder composite that is pyrolyzed. Constituent portions of the composite react together causing the particles to increase in density and reduce in size during pyrolyzation, yielding a particle suitable for use as a proppant or in a composite structure.

A method of fabricating a ceramic matrix composite includes infiltrating pores of a porous structure with a preceramic matrix polymer using a composite molding technique. The porous structure includes fibers and an exposed carbon coating on the fibers. The preceramic matrix polymer wets the exposed carbon coating. The preceramic matrix polymer is then pyrolyzed to convert the preceramic matrix polymer to a ceramic matrix.