A method for producing an acoustic attenuation panel from a composite material with a ceramic oxide matrix is provided that includes draping a plurality of plies having fibrous reinforcements including fibers of ceramic material in a mold to define a first skin, depositing blocks made of fugitive material on the first skin such that a space between two blocks is defined, and draping a second plurality of plies on a surface formed by the blocks such that a second skin is defined. Rounded corners of the blocks define radii for connecting the first and second skins with walls of a honeycomb core of the acoustic panel. The method further includes using a liquid medium to infiltrate the skins and spaces with a precursor of a ceramic phase, removing the liquid medium by evaporation or polymerization, and sintering to consolidate the ceramic oxide material and removal the fugitive material.

The invention relates to a method for connecting at least two components (1, 2), comprising the following steps: A) providing at least a first component (1) and a second component (2), B) applying at least one donor layer (3) to the first and/or the second component (1, 2), wherein the donor layer (3) is enriched with oxygen (31), C) applying a metal layer (4) to the donor layer (3), the first or the second component (1, 2), D) heating at least the metal layer (4) to a first temperature (T1) such that the metal layer (4) is melted and the first component (1) and the second component (2) are connected to one another, and E) heating the arrangement to a second temperature (T2) such that the oxygen (31) passes from the donor layer (3) into the metal layer (4) and the metal layer (4) is converted to form a stable metal oxide layer (5), wherein the metal oxide layer (5) has a higher melting temperature than the metal layer (4), wherein at least the donor layer (3) and the metal oxide layer (5) connect the first component (1) and the second component (2) to one another.

Adhesive compositions and methods for bonding materials with different thermal expansion coefficients is provided. The adhesive is formulated using a flux material, a low flux material, and a filler material, where the filler material comprises particulate from at least one of the two components being bonded together. A thickening agent can also be used as part of the adhesive composition to aid in applying the adhesive and establishing a desired bond thickness. The method of forming a high strength bond using the disclosed adhesive does not require the use of intermediary layer or the use of high cure temperatures that could damage one or both of the components being bonded together.

A bonded ceramic component which is resistant to reactive halogen-containing plasmas, said component comprising ceramic portions which are bonded together by a bonding material which includes an oxyfluoride glass-ceramic-comprising transition area between interfaces of the ceramic portions, where the transition area includes form at least 0.1 volume % amorphous phase up to about 50 volume % amorphous phase.

A bonded ceramic component which is resistant to reactive halogen-containing plasmas, said component comprising ceramic portions which are bonded together by a bonding material which includes an oxyfluoride glass-ceramic-comprising transition area between interfaces of the ceramic portions, where the transition area includes from at least 0.1 volume % amorphous phase up to about 50 volume % amorphous phase.

A sealing agent for ion transport membranes (ITMs) includes a composition having a glass powder and a ceramic powder. The ceramic powder can include Ba.sub.0.5Sr.sub.0.5Co.sub.0.8Fe.sub.0.2O.sub.3 (BSCF) or La.sub.2NiO.sub.4+ (LNO). The ceramic powder can be identical to the ceramic powder from which the ITM is made. The glass powder can include PYREX glass. The sealing agent can be in the form of a paste. The sealing agent can be used to attach an ion transport membrane to one or more support tubes. The sealing agent includes from about 10 wt. % to about 40 wt. % glass powder and from about 60 wt. % to about 90% wt. % (BSCF) ceramic powder.

A method for annealing thin-films of ceramics such as Al.sub.2O.sub.3 on glass by laser such that the underlying glass substrate is unaffected by the laser heating. This is accomplished by applying a thin MgO buffer layer to the glass, depositing an amorphous ceramic layer on the textured transparent buffer layer, and annealing the ceramic layer with a heated line source. The ceramic layer crystallizing forming a ceramic coated substrate. The buffer layer is also textured which serves to induce texture in the Al.sub.2O.sub.3 film deposited on the buffer layer. The induced texture on the Al.sub.2O.sub.3 provides advantageous properties. The ceramic glass can be used for a variety of applications such as covers to solar panels, CICs used in satellites, displays, automobile windows, and substrates for LEDs.

The present disclosure describes silicon carbide articles useful at high temperatures, and the method of making them. The method includes: providing a plurality of silicon carbide parts; providing a mullite gasket; placing the gasket between the ends of the parts to be joined to thereby form an assembly; applying a load in the range of 15-25 pounds per square inch to the parts' ends distal from the gasket to thereby press the gasket; heating the assembly in a muffle furnace under load to a temperature in the range of 1450 C. to 1550 C.; increasing the load on the to range of 30-50 pounds per square inch and holding the assembly at the temperature for a time in the range of 2-5 days to adhere the mullite gasket to the ends of the silicon carbide parts.

A voltage nonlinear resistive element includes a resistor containing a joined body in which a zinc oxide ceramic layer composed mainly of zinc oxide and having a volume resistivity of 1.010.sup.1 cm or less is joined to a bismuth oxide layer composed mainly of bismuth oxide, and a pair of electrodes disposed on the resistor such that an electrically conductive path passes through a joint surface between the zinc oxide ceramic layer and the bismuth oxide layer. In this element, the zinc oxide ceramic layer of the joined body has a lower volume resistivity than before. This can result in a lower clamping voltage in a high-current region than before.

The voltage nonlinear resistive element includes a resistor containing a joined body in which a zinc oxide ceramic layer composed mainly of zinc oxide and having a volume resistivity of less than 1.010.sup.2 cm is joined to a rare-earth metal oxide layer composed mainly of a rare-earth metal oxide, and a pair of electrodes disposed on the resistor such that an electrically conductive path passes through a junction between the zinc oxide ceramic layer and the rare-earth metal oxide layer. In this element, the zinc oxide ceramic layer of the joined body has a lower volume resistivity than before. This can result in a lower clamping voltage in a high electric current region than before.