Deutsches Zentrum Fur Luft-Und Raumfahrt E.v.

Deutsches Zentrum Fuer Luft-Und Raumfahrt E.v

Jorg Brien

Uwe Schulz

Klaus Fritscher

Hartmut Schurmann

Uwe Kaden

Harmut Schurmann

Claus Kroder

Claus-Jurgen Kroder

The present invention relates to a method for coating monocrystalline or polycrystalline metal substrates with a ceramic heat-insulating layer of zirconia by electron-beam vapor deposition, and to a method for coating turbine blades made of Ni-based superalloys. The method is characterized in that the metal substrate is moved during the vapor deposition in terms of a superposition of two rotational motions around horizontal axes, but in essentially perpendicular directions.

Heat-insulating layers on monocrystalline and polycrystalline metal

The present invention relates to a process for vapor-depositing zirconium dioxide on ceramic or metallic substrates, and the heat-insulating layers obtainable by such process. In particular, the invention relates to a process for vapor-depositing zirconium dioxide, optionally doped with rare-earth metal oxides or mixtures of such oxides, on ceramic or metallic substrates in a range of substrate temperatures of from 600 to 1550.degree. C. while the substrate is continuously rotated at a speed in the range of from 1 to 300 rpm, characterized in that, following the nucleation phase, the rotational speed and the temperature are adjusted to a range defined by the equations: ##EQU1## where T represents the substrate temperature in .degree. K, and .omega. represents the rotational speed of the substrate in rpm, wherein the rotational speed is varied continuously or discontinuously, or alternatively in alternating senses of rotation.

Ceramic heat-insulating layers with club-structure

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Koln, Germany

Jorg Brien