摘要:
The present invention deals with a method for making a high temperature composite, which is a carbon carbon composite, carbon fiber reinforced ceramic matrix composite, ceramic fiber reinforced ceramic matrix composite, or a carbon silica composite, comprising: a) providing a precursor part comprising a resin comprising a poly(aryl ether ketone) (PAEK) and at least one reinforcing material, wherein the resin has a degree of crystallinity of 10 % or more ; b) pyrolyzing the precursor part to a pyrolyzed part; c) infusing a liquid second resin into the pyrolyzed part to make an infused part; and d) pyrolyzing the infused part to make the carbon carbon composite carbon fiber reinforced ceramic matrix composite, ceramic fiber reinforced ceramic matrix composite, or the carbon silica composite, optionally repeating steps c. through d. one or more times. The invention also deals a carbon carbon composite, carbon fiber reinforced ceramic matrix composite, ceramic fiber reinforced ceramic matrix composite, or carbon silica composite made by the method presented herein.
摘要:
A thermoplastic polymer composition which is excellent in flexibility, mechanical properties, and moldability, capable of adhering to ceramics, metals, and synthetic resins without a treatment with a primer, and exhibits a high adhesion strength even when exposed to a high temperature environment, and a molded product obtained by using the thermoplastic polymer composition. The thermoplastic polymer composition includes 100 parts by mass of a thermoplastic elastomer (A), 1 to 100 parts by mass of a polyvinyl acetal resin (B), and 0.1 to 300 parts by mass a softener (C). The thermoplastic elastomer (A) is a block copolymer including a polymer block constituted by aromatic vinyl compound units and a polymer block constituted by conjugated diene units or a hydrogenated product of the block copolymer. The polyvinyl acetal resin (B) has a glass transition temperature of 80 to 130 °C.
摘要:
According to the present disclosure, a suction nozzle is composed of zirconia-based ceramics. The ceramics includes first grains and second grains. The first grains each contain zirconia, and the second grains each contain a black-colored component. The suction nozzle includes a suction face and a suction hole. The suction hole is in communication with the suction face. In the suction face, an area ratio of an area occupied by the second grains to a measurement face obtained by polishing the suction face is greater than or equal to 17% and less than or equal to 34%. A number of the second grains in an area of 90 µm 2 in the measurement face is greater than or equal to 150 but less than or equal to 250.
摘要:
The invention is characterized in that, in a silicon nitride substrate comprising a grain boundary phase with silicon nitride crystal particles and having a heat conductivity of 50W/m·K or greater, the sectional structure of the silicon nitride substrate has a ratio (T2/T1) of 0.01 to 0.30 between the thickness T1 of the silicon nitride substrate and the total length T2 of the grain boundary phase in the thickness direction, and a variation in the dielectric strength of 15% or less from the mean value, as measured by the four terminal method, in which electrodes are brought into contact with the front and the back of the substrate. In addition, a dielectric strength mean value of 15 kv/mm or greater is desirable. According to this constitution, the silicon nitride substrate having a small dielectric strength variation, and the silicon nitride circuit substrate using the same, are obtained.