Widia Gmbh

Siemens Aktiengesellschaft

3m Innovative Properties Company

Framatome Anp Gmbh

Monika A Willert-Porada

Thorsten Gerdes

Klaus R&ouml;diger

Klaus Dreyer

Klaus Hintzer

Tilman C Zipplies

Gerhard Gradel

Achim Schmidt-Rodenkirchen

Bruno Schmitt

Hartmut Westphal

Hans Kolaska

Thomas Kolbeck

Klaus Rodiger

Wolfgang D&ouml;rr

Udo K&ouml;nig

Gunther J Kaempf

Thomas G Kolbeck

Jens Herdegen

Ralph Borchert

Stephan Aschauer

Hannes Wolf

Aleksandra Moszczynska

Provided is a process for producing fluorinated alkenes by providing a microwave plasma in a reactor chamber, introducing a protective gas feed into the reactor chamber, and contacting a conversion feed comprising at least one fluorinated linear or branched alkane with the plasma. Also provided are an apparatus and the use of the process and the apparatus.

Process and apparatus for producing fluorinated alkenes

Process for producing fluorinated olefins from fluorinated materials, the process comprising thermally decomposing the fluoropolymers into fluoroolefins in a reactor having a feeding zone where the fluorinated materials are fed into the reactor and a decomposition zone where the fluorinated materials are thermally decomposed and wherein the thermal decomposition is carried out in the presence of microwave irradiation.

Process of making fluoroolefins by thermal decomposition of fluorinated materials

The invention relates to a device for adjusting the distribution of microwave energy density in an applicator which forms a resonator chamber and in which the radiation generated by microwave generators is guided to the applicator wall by waveguides; and to a use for this device. According to the invention, several electroconductive coupling pins ( ) are used, each of these extending preferably vertically into both the waveguide chamber and the applicator resonator chamber, in order to feed in the microwaves with as little loss as possible and to enable the field distribution in the resonator chamber to be modified. The invention is especially suitable for producing a plasma.

Device for adjusting the distribution of microwave energy density in an applicator and use of this device

A furnace is provided for microwave sintering of nuclear fuel. A stationary wave is generated in an antenna cavity and used to extract microwaves through slots into a resonance chamber containing the nuclear fuel. A position of the slots is adjusted in such a way that a predetermined temperature profile is produced in the nuclear fuel.

Furnace for microwave sintering of nuclear fuel

A method and a furnace are provided for microwave sintering of nuclear fuel. A stationary wave is generated in an antenna cavity and used to extract microwaves through slots into a resonance chamber containing the nuclear fuel. A position of the slots is adjusted in such a way that a predetermined temperature profile is produced in the nuclear fuel.

Method and furnace for microwave sintering of nuclear fuel

A metal-ceramic gradient material, in particular for a thermal shield or a gas turbine blade, includes a metal base material, a ceramic and an additive for high-temperature oxidation protection. The metal base material has a concentration decreasing from a metal-rich zone into a ceramic-rich zone. The additive has a concentration with a concentration gradient. The concentration of the additive has a maximum. A product made from a metal-ceramic gradient material and a process for producing a metal-ceramic gradient material are also provided.

Metal-ceramic gradient material, product made from a metal-ceramic gradient material and process for producing a metal-ceramic gradient material

A hard metal or cermet sintered body and a method of making it wherein a solid phase containing WC and a binder phase are formed together with WC platelets by direct microwave irradiation, utilizing reactive sintering to form the WC at least in part and to produce the platelets.

Hard metal or cermet sintered body and method for the production thereof

The invention concerns a composite body consisting of a hard metal, cermet or ceramic substrate body and at least one layer of a mechanically resistant material, a ceramic substance, a diamond-like layer, amorphous carbon and/or hexagonal boron nitride. The invention also concerns a method of producing this composite body, wherein, when the green compact has been dewaxed, with its pores still open and whilst it continues to be heated as from a temperature of between 600&deg; C. and 1100&deg; C., it is acted upon by sublimable solids and/or reaction gases which are necessary for coating purposes. The temperature of the green compact is then further increased and the latter is fully compressed by sintering, before one or more layers of the above-mentioned type is/are applied.

Composite body comprising a hard metal, cermet or ceramic substrate body and method of producing same

A composite body of a microwave sintered composition of a cermet or hard metal as a modified surface layer which can promote the microwave sintering and can be of a thickness of 0.01 to 1 mm with a density gradually decreasingly inwardly or a thickness up to 1 mm and having locally distributed compacts therein or which can be a layer of a thickness of 1 to 10 mm of a substantially pure metal or which can have a binder metal removed to a depth of about half the grain thickness of a hard material such as WC.

Composite body, especially for a cutting tool

A cermet or hard metal body is formed from elemental metal, carbon and a nitrogen source such as a metal nitride or an organic nitrogen source by microwave sintering such that chemical reaction occurs with the formation of carbides and/or carbonitrides. The elemental metal, carbon and nitrogen source are mixed together and prepressed to form the green body which is subjected to the microwave radiation in reaction sintering.

Growing community of inventors

Bayreuth, Germany

Monika A Willert-Porada