A tungsten silicide target capable of suppressing the occurrence of particles during sputtering is provided by a method different from conventional methods. The tungsten silicide target includes not more than 5 low-density semi-sintered portions having a size of 50 m or more per 80000 mm.sup.2 on the sputtering surface.

The invention relates to hydrocarbon conversion, to equipment and materials useful for hydrocarbon conversion, and to processes for carrying out hydrocarbon conversion, e.g., hydrocarbon pyrolysis processes. The hydrocarbon conversion is carried out in a reactor which includes at least one channeled member that comprises refractory and has an open frontal area 55%. The refractory can include non-oxide ceramic.

A method for making a turbine engine blade includes three-dimensionally weaving elongate fibers of a material selected from the group consisting of carbon, glass, silica, silicon carbide, silicon nitride, aluminum, aramid, aromatic polyamide, and combinations thereof to create a woven preform including a single piece of woven material. The woven preform includes continuous warp fibers extending along a first direction, continuous weft fibers extending along a second direction substantially normal to the first direction, and continuous fibers extending in a third direction substantially normal to the first and the second directions. The woven preform includes an airfoil region extending along the first direction and an arrangement of flaps extending along the second direction. The flaps are folded into a plane substantially normal to a plane of the airfoil region to form a shaped woven preform. The shaped woven preform is densified with a ceramic matrix.

The invention relates to hydrocarbon pyrolysis, to equipment and materials useful for hydrocarbon pyrolysis, to processes for carrying out hydrocarbon pyrolysis, and to the use of hydrocarbon pyrolysis for, e.g., hydrocarbon upgrading.

A thermoelectric conversion material formed of a sintered body containing magnesium silicide as a main component contains 0.5 mass % or more and 10 mass % or less of aluminum oxide. The aluminum oxide is distributed at a crystal grain boundary of the magnesium silicide.

The present disclosure relates to a molybdenum silicide based composition comprising aluminum oxide (Al.sub.2O.sub.3) and to the use thereof in high temperature applications.

A process of manufacturing a chromium alloyed molybdenum silicide portion of a heating element comprising the steps of: forming a mixture of a chromium powder and a silicon powder; reacting the mixture to a reaction product in an inert atmosphere at a temperature of at least 1100? C. but not more than 1580? C.; converting the reaction product to a powder comprising CrSi.sub.2; forming a powder ceramic composition by mixing the powder comprising CrSi.sub.2 with a MoSi.sub.2 powder and optionally with an extrusion aid; forming the portion of the heating element; and sintering the portion of the heating element in a temperature of from about 1450? C. to about 1700? C.; characterized in that the chromium powder and the silicon powder are provided separately to the mixture.

A method of making spherical gettering particles for an environmental barrier coating according to an exemplary embodiment of this disclosure, among other possible things includes spraying liquid preceramic polymer into a chamber via a nozzle to form liquid droplets, curing the liquid droplets to form spherical particles in the chamber, and converting the spherical particles to spherical ceramic gettering particles in a fluidized bed. A method of making spherical gettering particles for an environmental barrier coating and an article are also disclosed.

It is difficult for a CrSi-based sintered body composed of chromium silicide (CrSi.sub.2) and silicon (Si) to have high strength. Provided is a CrSi-based sintered body including Cr (chromium) and silicon (Si), in which the crystal structure attributed by X-ray diffraction is composed of chromium silicide (CrSi.sub.2) and silicon (Si), a CrSi.sub.2 phase is present at 60 wt % or more in a bulk, a density of the sintered body is 95% or more, and an average grain size of the CrSi.sub.2 phase is 60 ?m or less.

The invention relates to hydrocarbon pyrolysis, to equipment and materials useful for hydrocarbon pyrolysis, to processes for carrying out hydrocarbon pyrolysis, and to the use of hydrocarbon pyrolysis for, e.g., hydrocarbon upgrading.