Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Applikations-und Technikzentrum Fur Energieverfahrens-umwelt-und Stromungstechnik (atz-evus)

Applikations - Und Technikzentrum Fur Energieverfahrens- Umvelt- Und Stromungstechnik (atz-evus)

Gerhard Wolf

Andreas Emmel

Karl Thomas Fehr

Yaping Ye

A method for producing a ceramic layer on a surface formed from a Ni base alloy, includes the following steps: producing on the surface a ceramic layer containing ZrOas a main constituent; producing a gas phase having a temperature in the range from 400 to 900&#xb0; C., in which a vapor formed from a salt melt with the components alkali chloride, alkali sulphate and ZnClis contained in a carrier gas formed from an inert gas with an addition from 0.5 to 10% by weight HCl; and bringing the ceramic layer into contact with the gas phase for a period of time that is sufficient for an intermediate layer having a thickness of at least 0.1 &#x3bc;m to form between the ceramic layer and the surface.

Method for producing a ceramic layer on a surface formed from an Ni base alloy

A method for producing powders that consist of substantially spherical particles from a material such as glass, ceramics or plastic that produces a highly viscous melt that solidifies at a glass transition temperature Tor at a solidification temperature T. The inventive method comprises the following steps: (a) producing a melt of a viscosity &#x3b7; in the range of from 0.1 to 100 Ns/m; (b) atomizing the melt using a first gas, the first gas having a temperature T&#x2267;Tor &#x2267;0.5Tat the outlet of the nozzle and (c) cooling off the particles produced by atomization in a cooling section downstream of the nozzle using a coolant, the temperature of the coolant being smaller than Tor T.

Method and device for producing powders that consist of substantially spherical particles

A method for producing a powder by pulverizing a stream of molten metal using a pulverization gas, which directly hits the molten metal stream, whereby a) a reactive gas is used as the pulverization gas such that a compound is formed by the reaction of the pulverization gas with the metal or an alloy component thereof and b) the temperature of the pulverization gas and the cooling speed are set such that the metal or the alloy component thereof is converted into the compound, to a substantial degree completely, in one step.

Growing community of inventors

Hirschau, Germany

Gerhard Wolf