Abstract: The invention discloses an intermetallic material consisting of the following composition by weight percent: 10% Al, 22% Cr, 36% Co, 0.2% Y, 0.2% Hf, 2% Ta, 3% Fe, remainder Ni and inevitable impurities. The invention also describes its use as a layer protecting against high temperatures and at locations of thermal turbomachines which are subject to friction or vibration.

Abstract: The invention relates to an axial-flow thermal turbomachine, having a rotor (1) made from a metallic material with a first density (D1), in which rotor blades (3, 3?) and intermediate pieces (4) are mounted alternately in a circumferential groove. It is characterized in that said intermediate pieces (4) consist of a material with a second density (D2), which is lower than the first density (D1). Particularly suitable materials for the intermediate pieces (4) are intermetallic compounds, preferably intermetallic ?-titanium aluminide alloys or intermetallic orthorhombic titanium aluminide alloys, but also titanium alloys.

Abstract: The invention relates to an axial-flow thermal turbomachine having a metallic rotor (1), in which rotor blades (3) made of an intermetallic compound are mounted in a circumferential groove to form a row of blades. The invention is characterized in that at least two rotor blades (3?) which are at a uniform distance from one another and are made of a more ductile material are arranged in the said row of blades between the intermetallic rotor blades (3), the rotor blades (3?) made of the more ductile material either being considerably longer than the intermetallic blades (3) or, if they are of the same length, having a different blade tip shape than the intermetallic blades (3).

Abstract: The invention relates to an axial-flow thermal turbomachine, having a rotor (1) made from a metallic material with a first density (D1), in which rotor blades (3, 3?) and intermediate pieces (4) are mounted alternately in a circumferential groove. It is characterized in that said intermediate pieces (4) consist of a material with a second density (D2), which is lower than the first density (D1). Particularly suitable materials for the intermediate pieces (4) are intermetallic compounds, preferably intermetallic ?-titanium aluminide alloys or intermetallic orthorhombic titanium aluminide alloys, but also titanium alloys.

Abstract: A method of depositing a bond coating to a surface of an article includes the steps of depositing an inner layer of the bond coating consisting of ?-NiAl comprising Fe, Ga, Mo, B, Hf or Zr or ?/?-MCrAlY comprising Fe, Ga, Mo, B, Hf or Zr or ?/??- or ?-MCrAlY, and depositing an outer layer of the bond coating, which is more coarse the in the inner layer, consisting of ?-NiAl comprising Fe, Ga, Mo, B, Hf or Zr or ?/?-MCrAlY comprising Fe, Ga, Mo, B, Hf or Zr or ?/??- or ?-MCrAlY, wherein said elements Fe, Ga, Mo, B, Hf or Zr above mentioned are present individually or in combination. The coating also includes a noble metal selected from the group consisting of platinum, palladium and rhodium in the inner and outer layer or as a separate layer.

Abstract: The invention relates to a method of developing a nickel-base superalloy consisting of a &ggr;-phase and &ggr;′-phase for the production of single-crystal or directionally solidified bodies of material. The invention is characterized in that the properties of nickel-base superalloys with a volume proportion of &ggr;′-phase of at least 50% after a degradation at room temperature are optimized, in that the composition of the alloy is chosen such that at room temperature a lattice displacement (&dgr;) between the &ggr;-phase and the &ggr;′-phase is as high as possible. It is thereby attained that the yield strength at room temperature after degrading is comparatively high, and thus only a small difference of the yield strengths occurs between initial state and degraded state.

Abstract: The invention relates to a nickel-base superalloy. The alloy according to the invention is characterized by the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.3-1.4 Ti, 0.11-0.15 Si, 0.11-0.15 Hf, 200-750, preferably 200-300 ppm of C, 50-400, preferably 50-100 ppm of B, remainder Ni and production-related impurities. It is distinguished by very good castability and a high resistance to oxidation.

Abstract: In a heat treatment process for a single-crystal or directionally solidified material body comprising a nickel-based superalloy, the material body is solution-annealed and then at a first temperature &ggr;′ particles of greater than 1 &mgr;m are precipitated in a proportion by volume with Vtot−V1 of less than 50%, where Vtot is the total amount of &ggr;′ particles after complete heat treatment and V1 is the proportion of the &ggr;′ particles which is greater than 1 &mgr;m, and at least at a second temperature ‘&ggr;’ particles of less than 1 &mgr;m are precipitated. The &ggr;′ particles are preferably precipitated in a size of 2 pin or more with a proportion by volume of 0.25<(Vtot−V1)/(100−V1)<0.55 at the first temperature. The proportion by volume Vtot of the &ggr;′ particles will be at least 50%.

Abstract: The invention relates to a nickel-base superalloy for producing single-crystal components. The alloy according to the invention is characterized by the following chemical composition (details in % by weight): 7-13 Cr, 4-10 Co, 0.5-2 Mo, 2-8 W, 4-6 Ta, 3-6 Al, 1-4 Ti, 0.1-6 Ru, 0.01-0.5 Hf, 0.001-0.15 Si, 0-700 ppm C, 0-300 ppm B, remainder Ni and production-related impurities.

Abstract: The invention relates to a high-temperature alloy for a mechanically highly stressed component of a thermal machine based on doped TiAl and a method to improve a mechanical property of the alloy. The alloy has the following composition (in atomic %): 44.5 to <46 Al, 1-4 W, 0.1-1.5 Si, 0.0001-4 B, and the rest Ti and contaminations due to the manufacturing process. The alloy is characterized by improved heat resistance and ductility at high temperatures, and at the same time good oxidation and corrosion resistance.

Abstract: The invention relates to a nickel-base superalloy. The alloy according to the invention is characterized by the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.3-1.4 Ti, 0.11-0.15 Si, 0.11-0.15 Hf, 200-750, preferably 200-300 ppm of C, 50-400, preferably 50-100 ppm of B, remainder Ni and production-related impurities. It is distinguished by very good castability and a high resistance to oxidation.

Abstract: The invention relates to a high-temperature alloy for a mechanically highly stressed component of a thermal machine based on doped TiAl and a method to improve a mechanical property of the alloy. The alloy has the following composition (in atomic %): 44.5 to <46 Al, 1-4 W, 0.1-1.5 Si, 0.0001-4 B, and the rest Ti and contaminations due to the manufacturing process. The alloy is characterized by improved heat resistance and ductility at high temperatures, and at the same time good oxidation and corrosion resistance.

Abstract: In a blade possessing a blade body and a blade foot consisting of an alloy based on a doped gamma-titanium aluminide, at least part of the surface layer of the blade has a finely-grained structure, and the core has a coarsely-grained structure. The ductility of the finely-grained surface layer is higher than that of the coarsely-grained core. In a method for producing the blade, the surface is deformed after casting and hot-isostatic pressing of the blade. The deformed surface layer undergoes recrystallization annealing.

Abstract: A component such as a turbine blade (1) of a gas turbine is provided with an intermetallic felt (2). By providing the tip (11) of the turbine blade (1) with the intermetallic felt (2) and optionally a coating of a ceramic material (3), improved protection against thermal and mechanical effects and improved oxidation resistance can be achieved. Also conceivable would be an arrangement of the intermetallic felt (2) at the rotor (4, 4a) or stator (4, 4b) opposite from the turbine blade (1) or on the platform (12) of the turbine blade (1).

Abstract: In a heat shield (1), in particular for combustion chambers and for thermal fluid flow machines, the heat shield consists of a feltlike material (3) composed of compressed and sintered intermetallic fibers. Advantageously, the intermetallic fibers consist of an iron based or nickel based intermetallic phase.

Abstract: The invention relates to a coating which contains large volumetric fractions, preferably from 20 to 90% by volume, of NiAl-&bgr; phase in a &ggr; matrix. It contains the following microalloying elements which increase the ductility of the coating (data in % by weight): 0.1-8 Fe and/or 0.1-8 Mo and/or 0.1-8 Ga, where the total Fe, Mo and Ga content is at most 10%. In addition, small amounts of Zr, C and/or B may be added to the alloy, strengthening the &bgr;/&ggr; phase boundaries.

Abstract: An iron aluminide coating consists essentially of: 5-35% by weight aluminum 15-25% by weight chromium 0.5-10% by weight molybdenum, tungsten, tantalum and niobium 0-0.3% by weight zirconium 0-1% by weight boron 0-1% by weight yttrium the remainder being iron and also impurities and additaments arising from its production.

Abstract: Described is a sealing arrangement for reducing leakage flows inside a rotary fluid-flow machine, preferably an axial turbomachine, having moving and guide blades, which are in each case arranged in at least one moving- or guide-blade row respectively and have blade roots, via which the individual moving and guide blades are connected to fastening contours. A sealing element having felt-like material is provided between at least two adjacent blade roots within a guide- or moving-blade row or between guide and/or moving blades and adjacent components of the fluid-flow machine.

Abstract: An iron aluminide coating as a bonding layer between a thermally stressed element of a thermal turbomachine and a heat insulation coat consists essentially of:  5-35 % by weight aluminum 15-25 % by weight chromium 0.5-10  % by weight molybdenum, tungsten, tantalum and/or niobium   0-0.3 % by weight zirconium 0-1 % by weight boron 0-1 % by weight yttrium the remainder being iron and incidental impurities arising from production thereof.

Abstract: Described is a turbine blade with a metal blade body and a protective coating constructed of a porous intermetallic felt, and in the blade body of the turbine blade cooling air channels are constructed that end at the intermetallic felt in order to supply it with cooling air. The intermetallic felt is based on an iron or nickel aluminide alloy with mixing ratios of Fe:Al or Ni:Al of approximately 50:50, and that the protective coating has cooling channels that are facing the blade body and end in the area of the cooling channels. The design of the turbine blades permits their cooling with a smaller amount of cooling air, and, due to improved aerodynamics and a lower cooling air supply, the degree of effectiveness of the turbine is significantly increased.