摘要:
The presently disclosed technology relates to carbon-on-carbon (C/C) manufacturing techniques and the resulting C/C products. One aspect of the manufacturing techniques disclosed herein utilizes two distinct curing operations that occur at different times and/or using different temperatures. The resulting C/C products are substantially non-porous, even though the curing operation(s) substantially gasify a liquid carbon-entrained filler material that saturates a carbon fabric that makes up the C/C products.
摘要:
A body made of a ceramic material stabilized by a stabilizing agent, characterized in that the body comprises a surface region extending from the surface of the body to a predetermined depth, the stabilizing agent being enriched in said surface region.
摘要:
In one embodiment, a carbide-containing article includes a carbide body with an attached optional superabrasive layer. A braze metal coating is attached to a surface the carbide substrate. The coating primarily is made of particles of a metal having a melting point of less than 1200° C., the particles having a size of less than 0.1 mm. In another embodiment, a process for applying a braze metal coating to a carbide body of a superabrasive or other article includes depositing finely divided particles of a low melting point metal onto the carbide body by spraying the particles and gas onto the body at a velocity that is between 500 km/sec and 2 km/sec, with volumetric delivery of the particles being less than 50 grams per minute.
摘要:
A base plate for power module, comprising an aluminum-silicon carbide composite and aluminum layers made of a metal containing aluminum as the main component formed on respective principal planes of the aluminum-silicon carbide composite, wherein the aluminum-silicon carbide composite is produced by forming or fabricating a flat plate-shaped silicon carbide porous body to have a thickness difference of at most 100 μm in the entire porous body and piling such porous bodies as they are each sandwiched between mold-releasing plates so that the fastening torque in the plane direction becomes from 1 to 20 Nm, and infiltrating a metal containing aluminum as the main component into the silicon carbide porous bodies,wherein the aluminum layers each has an average thickness of from 10 to 150 μm, the difference between the maximum thickness and the minimum thickness of the aluminum layer in each principal plane is at most 80 μm, and the difference between average thicknesses of the aluminum layers on the respective principal planes is at most 50 μm, and wherein the shape of the silicon carbide porous body is rectangle or a rectangle from which peripheral portions encompassing holes are removed.
摘要:
An aluminum-silicon carbide composite suitable as e.g. a base plate for power module is provided.An aluminum-silicon carbide composite comprising a flat plate-shaped silicon carbide porous body infiltrated with a metal containing aluminum as the main component, aluminum layers made of a material containing aluminum as the main component formed on both principal planes of the porous body, wherein the aluminum-silicon carbide composite has side faces formed by abrasive jet fabrication and the side faces do not have the aluminum layers made of a metal containing aluminum as the main component.
摘要:
A composite material having a high thermal conductivity and a small thermal expansion coefficient, which is obtained by impregnating a porous graphitized extrudate with a metal; the composite material having such anisotropy that the thermal conductivity and the thermal expansion coefficient are 250 W/mK a more and less than 4×10−6/K, respectively, in an extrusion direction; and that the thermal conductivity and the thermal expansion coefficient are 150 W/mK or more and 10×10−6/K or less, respectively, in a direction perpendicular to the extrusion direction.
摘要:
A composite material having a high thermal conductivity and a small thermal expansion coefficient, which is obtained by impregnating a porous graphitized extrudate with a metal; the composite material having such anisotropy that the thermal conductivity and the thermal expansion coefficient are 250 W/mK or more and less than 4null10null6/K, respectively, in an extrusion direction; and that the thermal conductivity and the thermal expansion coefficient are 150 W/mK or more and 10null10null6/K or less, respectively, in a direction perpendicular to the extrusion direction.
摘要:
A ceramic member for bonding comprises: a ceramic base which is a sintered ceramic; and a metallic layer formed on the ceramic base by metallization, wherein the metallic layer comprises 70 to 85% by weight of at least one of tungsten and molybdenum and 0.5 to 8.5% by weight of nickel.
摘要:
A device for producing metal/ceramic composite materials includes (1) an injection plunger; (2) a casting chamber having an opening through which casting metal is poured in and a ceramic precursor product is shot in; and (3) a die having a runner and a die cavity. A shot head is used to shoot ceramic powder into a die, so that the powder is compacted to form a porous preform. The preform is infiltrated with liquid metal under pressure in the die.
摘要:
A method for enhancing optical properties of sintered, zirconia ceramic bodies and zirconia ceramic dental restorations is provided. The porous or pre-sintered stage of a ceramic body is treated with an yttrium-containing composition and sintered, resulting in sintered ceramic bodies having enhanced optical properties. The enhanced optical properties may be substantially permanent, remaining for the useful life of the sintered ceramic body.