A thermoelectric conversion material includes Mg.sub.2Si.sub.xSn.sub.1−x (where 0.3≤X≤1) and a boride containing one or two or more metals selected from titanium, zirconium, and hafnium. Further, it is preferable that the boride is one or two or more selected from TiB.sub.2, ZrB.sub.2, and HfB.sub.2.

According to the present invention, a dense composite material includes titanium silicide in an amount of 43 to 63 mass %; silicon carbide in an amount less than the mass percentage of the titanium silicide; and titanium carbide in an amount less than the mass percentage of the titanium silicide. In the dense composite material, a maximum value of interparticle distances of the silicon carbide is 40 μm or less, a standard deviation of the interparticle distances is 10 or less, and an open porosity of the dense composite material is 1% or less.

A ceramic matrix composite includes a substrate which contains a fibrous body made of silicon carbide fiber, and a matrix which is formed in the substrate, and which contains silicon carbide and a silicon material made of silicon or a binary silicon alloy.

A center flare tip assembly (16) and plenum flare tip assembly (18) with arms (20), having the outside of the center flare tip assembly (16), both inside and outside of the tips (18), the outside of the arms (20), and/or adjacent features of the flare tip (12) are covered with a high emissivity thermal layer (14) with an emissivity greater than 0.85. This reduces flare metal temperatures by thirty percent (30%) or greater, and increases flare life by two (2) to five (5) times current life.

A SiC powder containing 70% by mass or more of a β-SiC, wherein in a volume-based cumulative particle size distribution measured by a laser diffraction method, a D50 is 8 to 35 μm and a D10 is 5 μm or more.

A Cr—Si sintered body contains Cr and Si. The Cr—Si sintered body contains a crystalline CrSi.sub.2 phase and a crystalline Si phase. A content of the Si phase in the Cr—Si sintered body is 40% by mass or more. A relative density of the Cr—Si sintered body relative to a true density of the Cr—Si sintered body is 95% or more. The CrSi.sub.2 phase has an average crystal grain size of 40 μm or less, and the Si phase has an average crystal grain size of 30 μm or less. A total content of impurities in the Cr—Si sintered body is 200 ppm by mass or less, and the impurities are composed of at least one element selected from the group consisting of Mn, Fe, Mg, Ca, Sr, and Ba.

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.

A method of forming a ceramic matrix composite includes depositing particles on a ceramic fabric formed from a plurality of ceramic tows, applying a binder to at least the particles to form a stabilized ceramic fabric, forming a preform using the stabilized ceramic fabric, and densifying the preform. The ceramic tows are formed from a first material and the particles are formed from at least a second material.

The present invention relates to a compact container having a discharge plate made of ceramic, and more specifically, a compact container having a discharge plate made of ceramic, wherein, since the discharge plate is made of ceramic, the discharge plate is not to be worn out when a user spreads gel contents on the discharge plate and impregnates the puff with the gel contents. The ceramic which forms the discharge plate has high hardness and excellent heat resistance and wear resistance, thereby enabling long-time use. Cosmetic is allowed to exert antibacterial and antiseptic actions and heavy metal-removing and deodorizing functions when passing through the discharge plate. In addition, since the discharge plate is made of ceramic, the discharge plate is not bent and is lowered down with the entire part thereof balanced, even when the user presses the discharge plate for use of the cosmetic.

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.