Abstract: A method is taught for application of an abrasive tip to a gas turbine blade by brush plating, wherein particulate abrasive is applied to the tip of said blade and held in position during electroplating by a porous dielectric cloth.

Abstract: A method is taught for the preparation of ceramic fibers by electrophoretic deposition of metal oxide upon a conductive fiber core, which core may be subsequently removed.

Abstract: Fuel contacting surfaces of a gas turbine engine are protected from carbon deposition by the application of a coating of alumina and silica thereto from a sol gel specifically formulated for this purpose.

Abstract: A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by the application of a coating of alumina and silica thereto from a sol gel specifically formulated for this purpose.

Abstract: Fuel contacting elements for gas turbines comprise high temperature alloys having a coke inhibiting layer of titanium carbide, titanium nitride, titanium boride, or mixtures thereof.

Abstract: A method is taught for protecting the surface of a nickel, cobalt, or titanium alloy from fretting wear by coating said surface with a copper-aluminum alloy.

Abstract: A method is taught for modifying the coefficient of thermal expansion of a molybdenum disilicide matrix material, so as to permit preparation of refractory metal fiber reinforced matrices having improved high temperature strength, creep resistance, toughness, and resistance to matrix cracking during thermal cycling.

Abstract: Ceramic coated fibers may be produced by the electrophoretic deposition of metal oxide coatings on a conductive fiber core.

Abstract: A method is taught for the electrophoretic deposition of metal oxide coatings upon a conductive fiber core.

Abstract: A method is taught for the preparation of metal oxide sols particularly suited for the electrophoretic deposition of metal oxide coatings upon a fiber core.

Abstract: Transpiration cooled ceramic fiber seals are provided for high temperature use, said seals providing transpiration cooling by passage of a cooling medium through controlled porosity.

Abstract: A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into the grain boundaries of the alloy surface, which acts as a barrier between the hydrocarbon fuel and the catalytic elements in the surfaces. The method includes heating at a temperature of 1800-1850 F. for about one hour, cooling to 1525-1575 F. and holding for about four hours, and cooling to a temperature of 1375-1425 F. and holding for about 16 hours.

Abstract: A molybdenum disilicide composite comprising ceramic reinforcing fibers and sufficient particulate silicon carbide, silicon nitride, boron nitride or silica to modify the coefficient of thermal expansion of the matrix to match that of the fiber is found to have improved high temperature strength, creep resistance, toughness, and resistance to matrix cracking during thermal cycling.

Abstract: A method is disclosed for protecting a force-transmitting or force-receiving surface of titanium from fretting fatigue. The method constitutes coating the surface with a coating of an alloy of nickel, cobalt, and iron.

Abstract: A method is taught for modifying the coefficient of thermal expansion of a molybdenum disilicide matrix material, so as to permit preparation of ceramic fiber reinforced matrices having improved high temperature strength, creep resistance, toughness, and resistance to matrix cracking during thermal cycling.

Abstract: A molybdenum disilicide composite comprising refractory metal reinforcing fibers and sufficient particulate silicon carbide, silicon nitride, boron nitride, or silica to modify the coefficient of thermal expansion of the matrix to match that of the fiber is found to have improved high temperature strength, creep resistance, toughness, and resistance to matrix cracking during thermal cycling.

Abstract: A method is taught for joining a wrought alloy material to a cast alloy, so as to obtain a joint having superior structural integrity. A cast nickel-base superalloy part may be bonded to a wrought nickel-base superalloy part, for example, by positioning a suitable part or blank of said wrought superalloy adjacent to the cast superalloy part, applying a local bonding force to the interface while locally heating the interface to a temperature which causes localized softening, metal flow, and bonding, removing said bonding force, and subjecting the bonded assembly to a local or isothermal heat treatment so as to minimize distortion, optimize properties, and stress relieve the bonded assembly. This method may be used, for example, for the repair or replacement of vane assembly retaining lugs, whereby a replacement lug of a wrought alloy is solid state bonded to the vane assembly in place of the previous retaining lug.

Abstract: Fuel contacting elements for gas turbines comprise high temperature alloys having a coke inhibiting layer of alumina thereupon.

Abstract: A method is taught for protecting hydrocarbon contacting surfaces of a gas turbine engine from carbon deposition by the application of a coating of silica.

Abstract: A binder for fertilizer granulation is taught, comprising a reactive mixture of a metal salt and a metal oxide or hydroxide. Use of this binder permits the incorporation of higher percentages of "fines" or small particle fertilizer components.