摘要:
【課題】エンジンコンポーネントの高温腐食を軽減する、耐食コートによって保護されたコンポーネントおよび同コンポーネントを作るための方法を提供する。 【解決手段】ガスタービンのエンジンコンポーネント100は、高温耐熱材料から形成された基板102と、耐食層106とを含む。耐食層は、溶融塩不純物に対して不活性であり、化学式M x V y O z の耐熱金属バナジン酸塩を含み、Mが、アルカリ土類金属、第4族および第5族遷移金属、希土類金属、ならびに、それらの組合せから成る群から選択され、z=x+2.5yまたはz=1.5x+2.5yまたはz=2x+2.5yである。 【選択図】図1
摘要:
PROBLEM TO BE SOLVED: To provide a high temperature member for a gas turbine having a thermal barrier coating in which heat resistance property is improved.SOLUTION: In a high temperature for a gas turbine having a thermal barrier coating and a cooling structure, fine passages communicating from a base material side to a front face side are provided in the alloy substrate layer of the thermal barrier coating and in a thermal barrier ceramic layer, and a part of refrigerant cooling the member is flowed out to the outside of the member through the fine passages. Consequently, a heat resistant temperature improvement effect of the high temperature member, due to a leaching-out cooling effect, can be expected.
摘要:
Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is selected from nickel, or a combination of nickel with cobalt, iron, or combinations thereof. The compositions further comprise palladium, platinum, rhodium, or combinations thereof, hafnium, titanium, zirconium, or combinations thereof; and can further include silicon, germanium, or combinations thereof, wherein the composition results in improved A1 retention properties. Also disclosed herein are articles comprising the coatings.
摘要:
A component suitable for use in a gas turbine engine. The component includes a substrate defining a surface of the component and has a first surface and a second surface. At least one aperture extends through the substrate from the first surface to the second surface, and has a first open area. The component has a first coating on at least one of the first surface and the second surface adjacent to the at least one aperture. The component also has a second coating overlying the first coating adjacent to the at least one aperture, such that at least a portion of the first coating is exposed adjacent to the at least one aperture. The first coating defines a second open area which is smaller than the first open area. In another aspect, a method of manufacturing a component suitable for use in a gas turbine engine, comprising the steps of forming the component from a substrate having a first surface and a second surface, forming at least one aperture through the substrate from the first surface to the second surface having a first open area, applying a first coating to at least one of the first surface and the second surface adjacent to the at least one aperture, the aperture remaining at least partially unobstructed by the first coating, applying a second coating to the first coating adjacent to the at least one aperture, the aperture remaining at least partially unobstructed by the second coating, and removing the second coating from the aperture, leaving most or all of the first coating to define a second open area which is smaller than the first open area. In a further aspect, a method of repairing a component suitable for use in a gas turbine engine, the method comprising the steps of removing coatings from the component, repairing any defects in the substrate of the component, and applying coatings as described herein.
摘要:
PROBLEM TO BE SOLVED: To provide a method of manufacturing thermal barrier coated articles such as combustor tiles and turbine blades.SOLUTION: A method of manufacturing a thermal barrier coated article includes: (a) a step of forming an article having a plurality of projections 70 wherein each of projections has a first end 72 adjacent to the first surface 66 and a second end 74 away from the first surface, as well as at least one blind passage extending through the respective projection extending from the second surface 68 of the article through the article and through the respective projection towards the second end 74 of the respective projection, wherein the at least one blind passage in the respective projection is closed at the second end of the respective projection; (b) a step of depositing a thermal barrier coating 76 on the first surface 66 of an article 58A around each of the projections and on the second ends 74 of the projections; (c) a step of removing the thermal barrier coating 76 from the second ends of the projections; and (d) a step of removing the second end of the respective projection to form respective passages 84 extending from the second surface of the article to the second end of the projection.
摘要:
PROBLEM TO BE SOLVED: To provide a method (700) for applying a barrier coating (242) to a component (100).SOLUTION: There is provided a method (700) including a step (701) of providing a component (100) and a step (703) of preparing a mixture-containing slurry (250). The mixture includes a barrier coating composition (242) having a volume fraction of about 50-90% and two or more short fibers (240) having a volume fraction of 10-50%. The method (700) additionally includes a step (705) of applying at least one layer of the slurry (250) to at least part of the component (100), and a step (707) of curing the slurry (250)on part of component (100) to obtain a fiber reinforced barrier coating (200).
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 substrate such as blades, vanes and seal surfaces of gas turbine engines made from the high purity yttria or ytterbia stabilized zirconia powders have a plurality of vertical macrocracks homogeneously dispersed throughout the coating to improve its thermal fatigue resistance. The invention also relates to processes for producing the thermal barrier coatings.