摘要:
A crucible (9) of a nonmetallic material with an elongated cavity (42) to contain the material to be evaporated has on top a vapor emission slot (45) which is defined at its longitudinal edges (43, 44) by two elongated plates (40, 41) of a likewise nonmetallic material. In the cavity (42) two heating rods (46, 47) are disposed in a mirror-symmetrical relationship to a plane of symmetry (S) through the vapor emission slot (45), one under each of the plates (40, 41) defining the vapor emission slot (45). Additional heating means are provided outside of the crucible and inside of a thermal barrier system.
摘要:
This invention relates to erosion resistant coatings comprising at least 2 sublayer systems in which each sublayer system is separated from another by an interlayer, wherein (i) each sublayer system is the same or different and comprises at least 4 layers, (ii) said layers comprise alternating layers of a nitride-containing compound of stoichiometric composition and a nitride-containing compound of nonstoichiometric composition, (iii) each sublayer system has a thickness of greater than about 0.4 microns, and (iv) each interlayer is the same or different and comprises a metal-containing compound. This invention also relates to a method for producing the coatings and to articles, e.g., gas turbine compressor rotor blade and stator vanes, coated with the coatings.
摘要:
The present invention provides a system for coating substrates which are arranged within a vacuum chamber on a substrate holder which is situated at least partially in a coating range on whose both sides magnetron cathodes with magnet systems of permanent magnets with outside poles and inside poles are disposed, wherein the polarity of the magnet systems of the magnetron cathodes is such that poles of opposed polarity are opposite one another on both sides of the coating range; and on opposite sides of the coating range at least one magnet coil is disposed, and the oppositely situated magnet coils being connectable to a power source in such a manner that the fields of the magnet coils together make up a closed magnetic field, and that the polarity of the outside poles of the permanent magnet systems and of the magnet coils is the same.
摘要:
Evaporator crucible for vacuum depositing systems, having a crucible bottom with at least one bottom opening for the introduction of material in rod form for evaporation. At a distance from the bottom opening there is provided at least one metal crucible rim which preferably is provided with a coolant passage. To solve the problem of reducing the heat losses, the crucible rim is provided internally on at least a part of its depth with a lagging comprising ceramic material. This lagging preferably comprises individual ceramic building blocks which are preferably compressed from magnesium oxide.
摘要:
This invention relates to high purity yttria or ytterbia stabilized zirconia powders comprising from about 0 to about 0.15 weight percent impurity oxides, from about 0 to about 2 weight percent hafnium oxide (hafnia), from about 6 to about 25 weight percent yttrium oxide (yttria) or from about 10 to about 36 weight percent ytterbium oxide (ytterbia), and the balance zirconium oxide (zirconia). Thermal barrier coatings for protecting a component such as blades, vanes and seal surfaces of gas turbine engines, made from the high purity yttria or ytterbia stabilized zirconia powders, have a density greater than 88% of the theoretical density with a plurality of vertical macrocracks homogeneously dispersed throughout the coating to improve its thermal fatigue resistance.
摘要:
This invention relates to articles coated with a thermally sprayed coating of a high purity yttria or ytterbia stabilized zirconia powder, said high purity yttria or ytterbia stabilized zirconia powder comprising from about 0 to about 0.15 weight percent impurity oxides, from about 0 to about 2 weight percent hafnium oxide (hafnia), from about 6 to about 25 weight percent yttrium oxide (yttria) or from about 10 to about 36 weight percent ytterbium oxide (ytterbia), and the balance zirconium oxide (zirconia). The articles include, for example, blades, vanes and seal surfaces of gas turbine engines coated with a thermal barrier coating.
摘要:
This invention relates to erosion resistant coatings comprising at least 2 sublayer systems in which each sublayer system is separated from another by an interlayer, wherein (i) each sublayer system is the same or different and comprises at least 4 layers, (ii) said layers comprise alternating layers of a nitride-containing compound of stoichiometric composition and a nitride-containing compound of nonstoichiometric composition, (iii) each sublayer system has a thickness of greater than about 0.4 microns, and (iv) each interlayer is the same or different and comprises a metal-containing compound. This invention also relates to a method for producing the coatings and to articles, e.g., gas turbine compressor rotor blade and stator vanes, coated with the coatings.
摘要:
An apparatus for producing and coiling films of insulating material coated under a vacuum with electrically conductive material, comprising an electron beam vaporizer, a feed drum, a roller disposed above the electron beam vaporizer and looped by the film, a take-up drum, and deflector rolls for establishing a path for the film, at least one plasma source oriented towards the path of the film so that the plasma touches the film, said plasma source being disposed in the region of the path of the film from the electron beam vaporizer to the take-up drum, wherein the plasma source is disposed at the end of the angle of contact specified by one of the deflector rolls.
摘要:
A method and apparatus are disclosed for producing rolls or coils of film of insulating material which has been conductively coated, in a vacuum, by vaporizing conductive material in direct electron beam bombardment and condensing the vapor on the film surface. According to the invention, the film is subjected to a plasma treatment after coating and before the film is wound in a coil.
摘要:
A method and system for a vacuum-evaporative film-deposition process displays bar charts of the local evaporation power of each vapor source in the process and the film thickness deposited thereby in spatial coordination on a single display screen.