摘要:
A latent heat storage device including a vessel, a phase change material disposed within the vessel, at least one heat exchange interface in contact with the phase change material, at least one sheet of graphite foil which extends within the bulk of the phase change material.
摘要:
A method of producing a fiber-reinforced carbide-ceramic component includes producing a carbonaceous article from at least one unidirectional tape by pyrolysis, infiltrating the carbonaceous article with carbide former, and coating the at least one unidirectional tape with a coating material being volatile in pyrolysis and/or providing the at least one unidirectional tape with a transverse thread system including transverse threads composed of a material being volatile in pyrolysis. A fiber-reinforced carbide ceramic component is also provided.
摘要:
Cathodes for aluminum electrolysis cells are formed of cathode blocks and current collector bars attached to those blocks. The cathode slots receiving the collector bar are lined with expanded graphite lining thus providing longer useful lifetime of such cathodes and increased cell productivity. The expanded graphite provides a good electrical and thermal conductivity especially with its plane layer.
摘要:
A vented brake disk has improved heat dissipation by cooling channels that extend from an inner circumference to an outer circumference and the channel walls of which are formed with flow obstructions in the form of a female thread.
摘要:
A workpiece carrier for the inductive heating of workpieces contains ceramic materials at least at bearing surfaces which come into contact with the workpieces. The ceramic materials are distinguished by a high dimensional stability, low thermal and electrical conductivity and a high resistance to thermal shocks. A process for producing a ceramic material for a workpiece carrier obtains a suitable ceramic material by infiltrating a porous carbon skeleton with silicon. Processes for inductive heating and inductive hardening of workpieces with the workpiece carrier are also provided.
摘要:
A method for applying a thin coating to a flat side (front side) and edge surfaces of a two-dimensional formation of graphite foil, includes applying the coating material to the flat side (front side) to be coated by electrostatic powder spraying followed by a sintering cycle or melting cycle. During the spraying, the two-dimensional formation is electrically contacted on a limited area virtually in the middle of its rear side, facing away from the spraying direction, on a limited area at a distance of at least 5 mm from the edges. A method for heat dissipation in electronic equipment, is also provided.
摘要:
A hinge apparatus is capable of reliably withstanding a great number of stressor cycles. A layer of an inflectable fiber-reinforced composite material is embedded between two layers of a fiber reinforced composite material of high stiffness. The latter are formed with a separating joint along the line of inflection.
摘要:
A cooling plate module for fuel cell stacks contains an anode-side terminal plate and a cathode-side terminal plate, whose mutually facing surfaces functioning as cooling surfaces tightly enclose a coolant distribution structure and are joined to one another by a bonding agent. The bonding agent is applied to the cooling surfaces exclusively outside the coolant distribution structure surrounded by a seal, so that the bonding agent and coolant do not contact one another. Since the current transport between the terminal plates takes place principally via contact elements disposed in the coolant structure, it is not necessary for the bonding agent to be electrically conducting.
摘要:
Process for protecting fiber-reinforced, carbon-containing composites whose matrix comprises, at least in the outer layer, silicon carbide (SiC) and also silicon (Si) and/or silicon alloys against oxidation, which comprises the steps a) impregnation of the composite with an aqueous, phosphate-containing solution, b) drying, c) heat treatment at a temperature which is at least sufficient to convert the dried solution into insoluble compounds which are suitable for forming a self-healing glass, wherein the composite is treated oxidatively to form silicon oxide (SiO2) either prior to step a), between steps a) and b) or during or after step b) and/or c).
摘要:
Process for producing shaped bodies comprising fiber-reinforced ceramic materials, where a green body is produced in a first step by introducing a press moulding composition into a mold, where the press moulding composition comprises carbon fibers and/or carbon filaments and pitch and/or resins which, when treated thermally and with the exclusion of oxidizing agents, form carbon-containing residues, the green body is cured in a second step by heating to a temperature of from 120° C. to 280° C. under pressure, the cured green body, also referred to as intermediate body, is carbonized in a third step by heating in a nonoxidizing atmosphere to a temperature of from about 750° C. to about 1100° C. to form a C/C body, wherein heating in the first, second and/or third step is at least partly effected by an electric current being passed through the pressable composition, the green body and/or the cured green body, shaped bodies produced according to this process and their use as brake disks, clutch disks and friction disks