摘要:
A casting method and apparatus are provided for casting a near-net shape article, such as for example a gas turbine engine blade or vane having a variable cross-section along its length. A molten metallic melt is provided in a heated mold having an article-shaped mold cavity with a shape corresponding to that of the article to be cast. The melt-containing mold and mold heating furnace are relatively moved to withdraw the melt-containing mold from the furnace through an active cooling zone where cooling gas is directed against the exterior of the mold to actively extract heat. At least one of the mold withdrawal rate, the cooling gas mass flow rate, and mold temperature are adjusted at the active cooling zone as the melt-containing mold is withdrawn through the active cooling zone to produce an equiaxed grain microstructure along at least a part of the length of the article.
摘要:
Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine component.
摘要:
Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine airfoil component.
摘要:
A Pt—Al—Hf/Zr aluminide coating that can be used as a bond coat for TBC and improve TBC spallation life in service at elevated temperatures is provided. The aluminide coating can include a metastable ternary or higher X—Pt/Pd—Ni phase where the phase and other elements in the alloy system are present in a NiAl β phase of the coating. The metastable phase can be present and observable in the as-deposited condition of the bond coating; e.g. in an as-CVD deposited condition of the bond coating.
摘要:
A ceramic core is produced by introducing a fluid ceramic core material, such as a ceramic slurry, into a core-shaped cavity formed at least in part by one or more fugitive core tooling liners residing in a back-up body, removing the ceramic core from the cavity, and removing the one or more fugitive tooling liners from the back-up die body and discarding them. The fugitive tooling liners and optional tooling inserts are used in one or more production cycles (e.g. ceramic slurry injection cycle) to make a single or multiple ceramic cores and then replaced with fresh (un-used) tooling liners and optional inserts to make other ceramic cores.
摘要:
A Pt—Al—Hf/Zr aluminide coating that can be used as a bond coat for TBC and improve TBC spallation life in service at elevated temperatures is provided. The aluminide coating can include a metastable ternary or higher X—Pt/Pd—Ni phase where the phase and other elements in the alloy system are present in a NiAl β phase of the coating. The metastable phase can be present and observable in the as-deposited condition of the bond coating; e.g. in an as-CVD deposited condition of the bond coating.
摘要:
A crucible material comprises in weight % as a dry particulates mixture, before sintering, about 89% to about 93% ZrO2, about 7% to about 11% Y2O3, up to about 0.6% SiO2 as an impurity element, and is substantially free of magnesia. The crucible can be used in the melting or holding of a high chromium sputtering target alloy to provide a low oxygen concentration of the melted alloy of 300 ppm by weight or less.
摘要翻译:在烧结之前,坩埚材料以干燥颗粒混合物的重量%计含有约89%至约93%的ZrO 2,约7%至约11%的Y 2 O 3%,最多约0.6%的SiO 2作为杂质元素,并且基本上不含氧化镁。 坩埚可用于熔融或保持高铬溅射靶合金,以提供300重量ppm以下的熔融合金的低氧浓度。
摘要:
Method of forming an outwardly grown aluminide diffusion coating on a superalloy substrate disposed in a coating retort including the steps of heating the substrate to a temperature of 900 to 1200 degrees C., flowing a coating gas comprising aluminum trichloride and a carrier gas through the coating retort at a flow rate of the coating gas of about 100 to about 450 standard cubic feet per hour, providing a concentration of aluminum trichloride in the retort of less than 1.4% by volume of the coating gas, and providing a total pressure of the coating gas in the coating retort of about 100 to about 450 Torr.
摘要:
Method of making a sputtering target wherein the number of processing steps is reduced by providing melted sputtering target material in a heated mold and solidifying the melted material in the mold using a unidirectional heat removal process to produce a sputtering target with a selective grain orientation. The method can produce a solidified sputtering target having a selectively oriented multigrain microstructure or a selectively oriented single crystal microstructure suited or tailored to the sputtering process to be subsequently employed using the target.
摘要:
An aluminum casting alloy, comprises, in weight percent, about 4-9% Zn; about 1-4% Mg; about 1-2.5% Cu; less than about 0.1% Si; less than about 0.12% Fe; less than about 0.5% Mn; about 0.01-0.05% B; less than about 0.15% Ti; about 0.05-0.2% Zr; about 0.1-0.5% Sc; no more than about 0.05% each miscellaneous element or impurity; no more than about 0.15% total miscellaneous elements or impurities.