A method for brazing a first ceramic component and a second metal alloy component, to make a structural or external timepiece element, a zirconia-based ceramic is chosen for the first component and a titanium alloy for the second component, a first recess is made inside the first component, set back from a first surface in a junction area with a second surface of the second component, braze material is deposited on this first surface and inside each recess, the second surface is positioned in alignment with the first surface to form an assembly, this assembly is heated in a controlled atmosphere to above the melting temperature of the braze material, in order to form the braze in the junction area.

A method for joining engine components includes positioning a first plurality of thermal protection structures across a thermal protection space between a first thermal protection surface and a second thermal protection surface. The first and second engine components are locally joined by forming a first plurality of transient liquid phase (TLP) or partial transient liquid phase (PTLP) bonds along corresponding ones of the first plurality of thermal protection structures between the first thermal protection surface and the second thermal protection surface. The second thermal protection surface is formed from a second surface material different from a first surface material of the first thermal protection surface.

A sensor element (10) having a laminate structure, and extending in an axial direction AX, the sensor element including a first and second ceramic layers (118B, 115) disposed apart from each other in a laminating direction; a third ceramic layer (118) intervening between the first and second ceramic layers in the laminating direction and having a hollow space (10G) formed therein; and an internal space which is the hollow space surrounded by the first ceramic layer, the second ceramic layer, and the third ceramic layer, wherein, at a periphery (10f) of the internal space, a fourth ceramic layer (181) containing as a main component a ceramic material different from that contained as a main component in the first and third ceramic layers intervenes between the first ceramic layer and the third ceramic layer which are exposed to the internal space. Also disclosed is a method for manufacturing the gas sensor element.

The present invention relates to a dielectric composition having a main component and an auxiliary component. The main component is represented by (Bi.sub.aNa.sub.bSr.sub.cLn.sub.d)TiO.sub.3, where Ln comprises a rare earth element 0.100a0.400, 0.100b0.400, 0.100c0.700, 0d0.100, and 0.900a+b+c+d1.50. The auxiliary component contains a first auxiliary component or a second auxiliary component. The first auxiliary component includes an element selected from the group consisting of Li and K and combinations thereof and the second auxiliary component includes an element selected from the group consisting of Cu, Zn, Mn, Mg and Co and combinations thereof.

Methods of forming a metallic-ceramic brazed joint are disclosed herein. The method of forming the brazed joint includes deoxidizing the surface of metallic components, assembling the joint, heating the joint to fuse the joint components, and cooling the joint. In certain embodiments, the brazed joint includes a conformal layer. In further embodiments, the brazed joint has features in order to reduce stress concentrations within the joint.

The invention relates to a method for producing a metal-ceramic substrate including first and second metallizations and at least one ceramic layer incorporated between the first and second metallizations. Advantageously, first and second metal layers and the at least one ceramic layer are stacked superposed, and in such a way that the free edge sections, of the first and second metal layers respectively, project beyond the edges of the at least one ceramic layer and the first and second metal layers are deformed toward each other in the region of the projecting free edge sections and directly connected to each other in order to form a gas-tight, sealed metal container enclosing a container interior for receiving the at least one ceramic layer. Subsequently, the metal layers forming the metal container with the at least one ceramic layer received in the container interior are hot isostatically pressed together in a treatment chamber at a gas pressure between 500 and 2000 bar and at a process temperature between 300 C. and the melting temperature of the metal layers for producing a preferably flat connection of at least one of the metal layers and the at least one ceramic layer, and at least the projecting free edge sections, which are connected to each other, of the metal layers for forming the first and second metallization are subsequently removed.

A ceramic bonded body may include a first member, a second member, a joining layer between the first member and the second member, and a covering layer which covers the joining layer and is located over the first member and the second member. The first member and the second member may include aluminum nitride-based ceramic. The joining layer and the covering layer may include at least aluminum, calcium, yttrium, and oxygen where, in 100 mass % of all of the constituents configuring the joining layer and the covering layer, the aluminum is 21 mass % or more converted to oxides, the calcium is 21 mass % or more converted to oxides, and the sum of the aluminum and the calcium converted to oxides is 86 mass % or more. The covering layer has a content of yttrium converted to oxides greater than that of the joining layer.

A method for fabricating assemblies that includes providing a first component that further includes silicon carbide and that has an upper portion and a tapered lower portion; providing a second component that further includes silicon carbide and that has an upper portion that is adapted to receive the tapered lower portion of the first component; providing a predetermined amount of multiphase AlSi braze foil; grinding the AlSi braze foil into a powder; mixing a predetermined amount of braze paste binder with the AlSi powder to form a slurry; uniformly applying the slurry to the tapered lower portion of the first component; uniformly applying the slurry to the upper portion of the second component and inserting the tapered lower portion of the first component into the upper portion of the second component; and heating the applied slurry to a temperature of 725 C. to 1450 C. for a predetermined period of time.

Described is a process for preparing a ceramic substrate bonded with a metal foil. Moreover, described is a metal-ceramic-substrate provided with a thick-film layer and the use of a thick-film paste for bonding a metal foil onto a ceramic substrate.

A unitary ceramic component is provided that includes a first ceramic component; a second ceramic component; and a series-hybrid joint coupling the first ceramic component to the second ceramic component. The series-hybrid joint includes a first bonding interface coupling the first ceramic component and the second ceramic component and a second bonding interface coupling the first ceramic component and the second ceramic component. The first bonding interface exhibits properties that are different from the second bonding interface.