Forschungszentrum Juelich Gmbh

Rolls-royce Deutschland Ltd & Co. Kg

Forschungszentrum Julich Gmbh

Daniel Emil Mack

Robert Vassen

Martin Tandler

Detlev Stoever

Olivier Guillon

Susanne Schrüfer

Frank Kurze

Caren Sophia Gatzen

Georg Mauer

Sonja-Michaela Gross

Yanli Zhang

Robert VAßEN

Susanne SCHRÜFER

Jan Bergholz

The disclosure relates to a method for operating a gas turbine at a high temperature and to a gas turbine assembly. In the method, a gas turbine having a structural material and a thermal barrier layer disposed on the structural material is cooled down in a decelerated manner after operation at an operating temperature above 1000° C., so that damage to the structural material and/or the thermal barrier layer is minimized. In this way, the gas turbine can be operated permanently at temperatures above 1500° C.

Operation of a gas turbine at a high temperature and gas turbine assembly

A construction element, particularly adapted and configured for use in a turbo engine, in particular an aircraft engine, wherein a bond coat having a bond structure and thereabove a ceramic coat are disposed on a base. The lateral faces of the bond structure in the cross section are configured so as to be free of undercuts, wherein peak structures and/or trough structures are present, and the peak of the cross section of a peak structure has a mean peak angle (&#x3b1;) of less than or equal to 90&#xb0;, most particularly less than 45&#xb0;, and/or the trough structure has a valley angle in the range 90&#xb0;&#x2264;&#x3b2;&#x3c;170&#xb0;.

Construction element having a bond structure for a turbo engine, method for the production of a construction element having a bond structure for a turbo engine, and turbo engine having a construction element having a bond structure

A method for generating a structured surface on a substrate includes analyzing a substrate surface of the substrate and selecting, as a function of a condition of the substrate surface, method parameters including focus diameter, pulse peak power, pulse energy, point spacing, pulse length, pulse spacing and/or pulse sequence. The method further includes generating, by partial ablation and partial deposition via treatment with an intensive pulsed laser beam, surface structures having dimensions in the sub-micrometer range such that a multi-scale surface structure in the sub-micrometer and micrometer range adapted to intrinsically inhomogeneous properties of the substrate surface in the sub-micrometer range is generated. The substrate is an inhomogeneous substrate.

Method for structuring a substrate surface

A method produces thermal barrier coatings that adhere to components even at high temperatures and temperatures that change frequently. A gas-tight glass-metal composite coating is applied to the component and annealed. The corroded part of the gas-tight coating is then removed, and a second, porous coating is applied. The second coating can comprise a ceramic, in particular yttrium-stabilized zirconium oxide. A thermal barrier coating is provided that is a composite made of a gas-tight glass-metal composite coating and another porous coating disposed thereover. Because the boundary volume of the composite coating is partly crystallized to the other coating, superior adhesion within the composite is achieved. Thus, it is in particular possible to produce a composite made of silicate glass-metal composite coatings and yttrium-stabilized zirconium oxide that are temperature-stable for extended periods of time. Such a composite is particularly advantageous for use as a thermal barrier coating because it combines good protection against oxidation with low heat conductivity and susceptibility to aging.

Sandwich thermal insulation layer system and method for production

Growing community of inventors

Cologne, Germany

Daniel Emil Mack