Abstract:
There is provided a component that includes a core (14) that includes a first material (16) of a metal material (24) or a ceramic matrix composite material (22). A shell (18) surrounds the core (14). The shell (18) is of a second material (20) that is the other of the metal material (24) or the ceramic matrix composite material (22) of the first material (16). A circumferential gap (26) is disposed between the core (14) and the shell (18). An intermediate cushion (28) is disposed within the circumferential gap (26). The intermediate cushion (28) is of a deformable material and is effective to transfer a thermal and mechanical load between the core (14) and the shell (18).
Abstract:
A metal-on-ceramic substrate comprises a ceramic layer (210), a first metal layer (240), and a bonding layer (220) joining the ceramic layer to the first metal layer. The bonding layer includes thermoplastic polyimide adhesive that contains thermally conductive particles. This permits the substrate to withstand most common die attach operations, reduces residual stress in the substrate, and simplifies manufacturing processes. The thermally conductive particles are preferably chosen from the group consisting of silver, copper, gold, graphene, carbon nanotubes, hexagonal BN, wurtzitic BN, cubic BN, BN nanotubes, diamond, AIN, and Si 3 N 4. The process for creating the circuit substrate comprises: placing the bonding layer between the ceramic layer and the first metal layer; applying pressure to bond the ceramic layer to the first metal layer using the bonding layer; and curing the bonding layer.
Abstract:
Cutting elements include a diamond-bonded body attached with a substrate. The substrate has a coercivity of greater than about 200 Oe, and has a magnetic saturation of from about 73 to 90. The diamond-bonded body has a compressive stress at the surface of greater than about 0.9 GPa after heat treatment, and greater than about 1.2 GPa prior to heat treatment.
Abstract:
A method of forming a diamond compact includes adding an additive material to a tungsten carbide substrate, the additive material including a transition metal carbide other than tungsten carbide, placing a diamond body adjacent to an interface surface of the tungsten carbide substrate, and subjecting the diamond body and the tungsten carbide substrate to a high pressure high temperature bonding process to bond the diamond body to the tungsten carbide substrate.
Abstract:
Ensemble de joint d'étanchéité qui comprend: (a) un tube céramique (1) (b) une première bague (2) en alliage réfractaire comprenant: - une ouverture cylindrique (21) permettant de recevoir le tube céramique; - un premier épaulement (22) situé à l'extrémité inférieur de la bague, orienté vers l'intérieur de l'ouverture cylindrique et permettant de supporter ledit tube céramique - un deuxième épaulement (23) formant un espace annulaire, à l'extrémité supérieure de la bague, entre le tube céramique et la première bague en alliage réfractaire; (c) une deuxième bague (3) en un matériau de scellement déformable par traitement thermique située dans l'espace annulaire formé par le deuxième épaulement de la bague en alliage réfractaire; et (d) une troisième bague (4) en alliage métallique posée sur le bord supérieur de la première bague (2).
Abstract:
The invention relates to high-temperature resistant crystallizing solder glasses which contain 20-45 mol% of BaO, 40-60 mol% of SiO2, 0-30 mol% of ZnO, 0-10 mol% of AI2O3, 0-5 mol% of BaF2, 0-2 mol% of MgO, 0-2 mol% of CaO, 0-2 mol% of TiO2, 0-10 mol% of B2O3, as well as 0,5-4 mol% of M2O3 (M = Y, La or rare earth elements) and/or 0.5-4 mol% of ZrO2, and to the use thereof.
Abstract:
A method is disclosed for mechanically bonding a metal component to a ceramic material, comprising providing a metal component comprising an anchor material attached to at least a first portion of one surface of the metal component; providing a ceramic material having a first surface and a second surface, wherein the ceramic material defines at least one conduit extending from the first surface to the second surface, wherein the at least one conduit has a first open end defined by the first surface, a second open end defined by the second surface, a continuous sidewall and a cross sectional area; positioning the ceramic material such that at least a portion of the at least one conduit is in overlying registration with at least a portion of the anchor material; and applying a bonding agent into at least a portion of the at least one conduit.
Abstract:
The invention relates to components having a ceramic base the surface of which is covered in at least one area by a metalized coating. For coatings of said type, problems with respect to their stability and adhesion may arise. The invention is characterized in that the material on the surface of the ceramic base is chemically and/or crystallographically and/or physically modified with or without addition of suitable reactants across the entire surface or on partial surfaces of the metalized areas and forms at least one nonporous or porous layer, joined to the ceramic base, that has the same or different thickness of at least 0.001 nanometers, said layer consisting of at least one homogeneous or heterogeneous new material.