Abstract: A method is disclosed to deposit aluminum and a metal oxide on substrates for improved corrosion, oxidation, and erosion protection. Low temperature chemical vapor deposition is used. A homogeneous biphase coating may be deposited, as well as layers of aluminum and metal oxides.

Abstract: A cobalt base, high temperature brazing alloy having a composition, by weight of:______________________________________ Nickel from about 8.5% to about 12.5% Chromium from about 24% to about 40% Tungsten from about 0% to about 9% Carbon from about 0.03% to about 0.6% Boron from about 0.01% to about 3.5% Silicon from about 1.0% to about 11% Manganese up to about 2% Cobalt Balance ______________________________________is provided for use in the repair of Co-base turbine component superalloys.

Abstract: A cobalt base, high temperature brazing alloy having a composition, by weight of:______________________________________ Nickel from about 8.5% to about 12.5% Chromium from about 24% to about 40% Tungsten from about 0% to about 9% Carbon from about 0.03% to about 0.6% Boron from about 0.01% to about 3.5% Silicon from about 1.0% to about 11% Manganese up to about 2% Cobalt Balance ______________________________________is provided for use in the repair of Co-base turbine component superalloys.

Abstract: A corrosion resistant filler weld alloy is provided for use in repairing a preselected article alloy of predetermined composition range at a temperature equal to or greater than the incipient melting temperature of the article alloy, the filler weld alloy having a composition, by weight of:Chromium--from about 20% to about 48%Nickel--about 20%Tungsten--from about 0% to about 4%Carbon--about 0.1%Silicon--about 0.9%Manganese--about 0.6%Tantalum--from about 0% to about 3.5%Titanium--from about 1% to about 2.25%Cobalt--Balance.

Abstract: A cobalt base, high temperature brazing alloy having a composition, by weight of:______________________________________ Nickel from about 8.5% to about 12.5% Chromium from about 24% to about 40% Tungsten from about 0% to about 9% Carbon from about 0.03% to about 0.6% Boron from about 0.01% to about 3.5% Silicon from about 0.1% to about 11% Manganese up to about 2% Hafnium from about 0.1% to about 3% Tantalum from about 0.1% to about 8% Zirconium from about 0% to about 1% Titanium from 0% to about 1% Cobalt Balance ______________________________________is provided for use in the repair of Co-base turbine component superalloys.

Abstract: Cobalt-base superalloys having special utility in the production of industrial gas turbine hot gas path components because of their unique combination of properties in specially heat-treated condition including excellent hot corrosion resistance, stress-rupture strength at high temperature, metallurgical stability, tensile ductility and weldability, consist essentially of 0.3 to 0.6% carbon, 27-35% chromium, 9-16% nickel, 6-9% tungsten, 0.45 to 2.0% tantalum, up to 3.0% hafnium, up to 0.7% zirconium, not more than 2.0% iron, 1.5% manganese and silicon and 0.

Abstract: An internally cooled rotor for an acyclic generator has a ferromagnetic steel core to which is diffusion bonded a cylindrical copper conductor in which is embedded a multiplicity of cooling tubes communicating with coolant passages formed in the core. The cooling tubes are implanted in a hot isostatic pressure process during which the copper cylinder is at least in part created by the densification of copper powder to a non-porous mass.

Abstract: An internally cooled rotor for an acyclic generator is disclosed as having a ferromagnetic steel core to which is diffusion bonded a cylinder copper conductor in which is embedded a multiplicity of cooling tubes communicating with coolant passages formed in the core. The cooling tubes are implanted in a hot isostatic pressure process during which the copper cylinder is at least in part created by the densification of copper powder to a non-porous mass.

Abstract: A method of applying a duplex sheet cladding to a structural substrate is disclosed. The method utilizes hot isostatic pressure with molten glass as a pressure transmitting medium. An inner sheet cladding of aluminum is formed over the substrate and then an outer MCrAlY sheet cladding is assembled thereon which completely envelops and seals the inner cladding. Thereafter the duplex cladding is diffusion bonded to the substrate at elevated pressures and temperatures in accordance with a programmed time-temperature hot isostatic pressure cycle.

Abstract: Sheet cladding is applied to a substrate by applying powdered glass to the seams of the cladding after it has been assembled to the substrate. A vacuum at which the glass can be melted without decomposition is established and the glass is melted in the presence of preselected gas. Thereafter, the sheet cladding and the substrate are diffusion bonded.

Abstract: A method of fabricating complex, composite components for water-cooled, high temperature gas turbines is provided. The method utilizes hot isostatic pressure with molten glass as a pressure transmitting medium. Metal tubing and cladding are bonded to a component core under conditions such that the ends of the tubing extend above the molten glass whereby the pressure inside and outside of the tubing is maintained at equilibrium to prevent collapsing thereof during the application of hot isostatic pressure.

Abstract: Austenitic alloys are disclosed which consist of iron, nickel, cobalt, chromium, aluminum, and yttrium, and articles utilizing these alloys are described such as claddings for gas turbine buckets. The substitution of selected quantities of nickel or nickel and cobalt in prior art ferrous alloys, together with the use of rather high levels of chromium, yields articles having excellent high-temperature strength, oxidation and hot corrosion resistance, and diffusion and thermal expansion compatibility with superalloy substrates.

Abstract: A method is provided for fabricating complex composite components for water-cooled, high temperature gas turbines. Each component comprises a core, a thermally conducting layer of copper bonded to the core, metal tubing through which water may pass embedded in and bonded to the layer, and a corrosion resistant cladding. The method utilizes powder metallurgy techniques to form the thermally conducting layer and hot isostatic pressure to bond the corrosion resistant cladding spar and tubes to said layer.

Abstract: A method is disclosed for metallurgically bonding a protective sheet cladding to a convex-concave substrate such as an airfoil or turbine blade. According to the method of the invention, a preassembled sheet cladding and substrate is masked at all seams. The masked assembly is then placed in a deformable container with the remaining volume filled with glass chips. The container is thereafter outgassed and sealed air-tight. The container is then placed in a hot gas autoclave for diffusion bonding. During the diffusion bonding step, the glass melts and the container deforms thereby ensuring an isostatic stress state. The bonded clad-substrate is subsequently removed from the container for final cleaning.