Forschungszentrum Juelich Gmbh

Forschungszentrum Julich Gmbh

Rolls-royce Deutschland Ltd & Co. Kg

Mtu Aero Engines Gmbh

Oerlikon Metco Ag

Forschungszentrum J{umlaut Over (u)}lich Gmbh

Robert Vassen

Detlev Stöver

Detlev Stoever

Daniel Emil Mack

Jesus Gonzalez

Hans Peter Buchkremer

Olivier Guillon

Martin Tandler

Gerhard Pracht

Apurv Dash

Wolfgang Jungen

Detlev St&ouml;ver

Frank Tietz

Martin Bram

Malko Gindrat

Uwe Schulz

Bilge Saruhan-Brings

Christian Friedrich

Wolfgang Wachter

Konstantin Von Niessen

Markus Dietrich

Werner Mallener

Diana Marcano

Frank Kurze

Sonja-Michaela Gross

Susanne Schrüfer

Sigrid Schwartz-Lueckge

Dag Hathiramani

Andreas Hospach

Jens-Erich Döring

Roberto Siegert

Georg Mauer

Franziska Traeger

Rolf Wilkenh&ouml;ner

Karl-Heinz Rauwald

Sigrid Schwartz-Lückge

Caren Sophia Gatzen

Claus-Juergen Kroeder

Denise Koch

Wim G Sloof

Xuegiang Key Lab Of Rare Earth Chemand Phy Cao

José-Luis Marqués

The invention relates to a method for producing a non-oxide ceramic powder comprising a nitride, a carbide, a boride or at least one MAX phase with the general composition Mn+1AXn, where M=at least one element from the group of transition elements (Sc, Ti, V, Cr, Zr, Nb, Mo, Hf and Ta), A=at least one A group element from the group (Si, Al, Ga, Ge, As, Cd, In, Sn, Tl and Pb), X=carbon (C) and/or nitrogen (N) and/or boron (B), and n=1, 2 or 3. According to the invention, corresponding quantities of elementary starting materials or other precursors are mixed with at least one metal halide salt (NZ), compressed (pellet), and heated for synthesis with a metal halide salt (NZ). The compressed pellet is first enveloped with another metal halide salt, compressed again, arranged in a salt bath and heated therewith until the melting temperature of the salt is exceeded. Optionally, melted silicate can be added, which prevents the salt from evaporating at high temperatures. Advantageously, the method can be carried out in the presence of air.

Method for producing non-oxide ceramic powders

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 sintering metallic and/or non-oxide components includes completely encapsulating, in a metal halide salt, a green body comprising at least one metallic and/or non-oxide powder, and compressing the encapsulated green body so as to be gastight. The method further includes heating, together with a metal halide salt in the presence of oxygen up to sintering temperatures, the compressed, encapsulated green body. The method additionally includes at least partially dissolving, after cooling, the metal halide salt in a liquid so that the sintered component can be removed.

Method for sintering metals, non-oxide ceramics and other oxidation-sensitive materials

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

Disclosed is a method for producing a metal or ceramic component having regions of differing porosities. The method includes subjecting powder or a presintered precursor to a pressure-assisted pressing and sintering step, using at least one punch for the pressing step. The at least one punch has a contact surface that is intended for making contact with the powder or the presintered precursor and that has a flat outer region and an inner region having a concave recess. After the sintering step, a component is obtained that has a flat outer compacted region having a first porosity and an inner porous region having a second porosity. The component has, on at least one side, a defined transition region between the outer region and the inner region.

Method for producing metal or ceramic components and components

To apply a thermal barrier coating (), a plasma jet () is generated by a plasma torch in a work chamber () and is directed to the surface of a substrate () introduced into the work chamber, and a ceramic coating material is applied to the substrate surface by means of PS-PVD, wherein the coating material is injected into the plasma jet as a powder and is partly or completely vaporized there. On applying the thermal barrier coating, in a first workstep the feed rate of the injected powder is set so that a large part of the injected powder vaporizes, wherein the coating material condenses from the vapor phase on the substrate surface and forms mixed phases with the material of the substrate surface. In a second workstep, the feed rate of the injected powder it increased by at least a factor of 5, whereby the portion of the powder which vaporizes is reduced and the coating material is deposited in the form of elongate columns which form an anisotropic microstructure and which are aligned substantially perpendicular to the substrate surface.

Method of applying a thermal barrier coating

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

A heat-insulating material has a first phase with the stoichiometric composition of 0.1 to 10 mol-% M1O, 0.1 to 10 mol-% LiO, and as the remainder M2Owith possible impurities. M1 is selected from the elements lanthanum, neodymium, gadolinium, or a mixture thereof, and M2 is selected from the elements aluminum, gallium, iron, or a mixture thereof. The first phase is present in a magnetoplumbite structure.

Heat-insulating material, production method and use thereof

A heat-insulating layer has a melting point above 2500&#xb0; C., a thermal expansion coefficient in excess of 8&#xd7;10K, and a sintering temperature greater than 1400&#xb0; C. This material has a perovskite structure of the general formula A(B'B&#x2033;)Oin which:

Heat-insulating layer made of complex perovskite

The aim of the invention is to produce complete high temperature fuel cells by means of thermal injection processes (e.g. atmospheric plasma injection, vacuum plasma injection, high speed flame injection). The production method is especially simplified and is economical by virtue of the fact that the carrier substrate is also produced on a base with the aid of a thermal injection method. The base or an intermediate layer placed thereon can be advantageously dissolved or decomposed such that the carrier substrate provided with layers arranged thereon can be separated in a very simple manner from the base which becomes unnecessary. Said method advantageously enables the production of all layers of a high temperature fuel cell, exclusively with the aid of a thermal injection method.

Method for producing a layer system comprising a metallic carrier and an anode functional layer

A heat-insulating material has a melting point above 2500&#xb0; C., a thermal expansion coefficient in excess of 8&#xd7;10K, and a sintering temperature greater than 1400&#xb0; C. It has a perovskite structure of the general formula A(B'B&#x2033;)Owhere

A heat-insulating layer system for a metallic structural component, especially for a structural component of a gas turbine such as an aircraft engine, includes an adhesion promoting layer (), an inner contact layer (), and an outer cover layer () , whereby the adhesion promoting layer (). is disposed on a surface () of the gas turbine structural component (). The inner contact layer () is formed of a zirconium oxide partially stabilized with yttrium or yttrium oxide, and the outer cover layer () is formed of a material that consists of at least one component with at least one phase, which stoichiometrically comprises 1 to 80 Mol-% MxO, 0.5 to 80 Mol-% MyO and AlOas a remainder with incidental impurities, wherein Mx is selected from the elements chromium and barium or mixtures thereof, and wherein My is selected from the alkaline earth metals, the transition metals and the rare earths or mixtures thereof.

Heat-insulating layer system

The invention relates to a material, in particular for a thermal insulation layer, with increased thermal stability, a low heat conductivity and a large thermal coefficient of expansion. According to the invention, said material comprises lanthanides, in particular the elements La, Ce, Nd, Yb, Lu, Er or Tm, which preferably occur as a mixture in a Perovskite structure. Said thermal insulation layer is particularly suitable for replacing thermal insulation layers comprising yttrium stabilized zirconium oxides (YSZ) as the thermal stability thereof is given as well over 1200&deg; C.

Material for thermally loaded substrates

In a dispersoid-reinforced electrode with a net-like open pore structure and a ceramic and a metallic meshwork, ceramic particles with an average particle diameter of less than 100 nm are homogeneously distributed in the metallic network thereby reinforcing the electrode.

Dispersoid-reinforced electrode

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Herzogenrath, Germany

Robert Vassen