Abstract: A system for coating a surface comprises providing a source of amorphous metal, providing ceramic particles, and applying the amorphous metal and the ceramic particles to the surface by a spray. The coating comprises a composite material made of amorphous metal that contains one or more of the following elements in the specified range of composition: yttrium (?1 atomic %), chromium (14 to 18 atomic %), molybdenum (?7 atomic %), tungsten (?1 atomic %), boron (?5 atomic %), or carbon (?4 atomic %).

Abstract: A method of coating a surface comprising providing a source of amorphous metal that contains manganese (1 to 3 atomic %), yttrium (0.1 to 10 atomic %), and silicon (0.3 to 3.1 atomic %) in the range of composition given in parentheses; and that contains the following elements in the specified range of composition given in parentheses: chromium (15 to 20 atomic %), molybdenum (2 to 15 atomic %), tungsten (1 to 3 atomic %), boron (5 to 16 atomic %), carbon (3 to 16 atomic %), and the balance iron; and applying said amorphous metal to the surface by a spray.

Abstract: A method of coating a surface comprising providing a source of amorphous metal that contains manganese (1 to 3 atomic %), yttrium (0.1 to 10 atomic %), and silicon (0.3 to 3.1 atomic %) in the range of composition given in parentheses; and that contains the following elements in the specified range of composition given in parentheses: chromium (15 to 20 atomic %), molybdenum (2 to 15 atomic %), tungsten (1 to 3 atomic %), boron (5 to 16 atomic %), carbon (3 to 16 atomic %), and the balance iron; and applying said amorphous metal to the surface by a spray.

Abstract: Methods for producing multilayered, oxidation-resistant structures on substrates are provided. The methods comprise depositing silicon dioxide on a substrate comprising molybdenum and boron and annealing the silicon dioxide at a temperature and for a time sufficient to form a coating comprising a borosilicate scale on the substrate.

Abstract: A method of coating a surface comprising providing a source of amorphous metal that contains manganese (1 to 3 atomic %), yttrium (0.1 to 10 atomic %), and silicon (0.3 to 3.1 atomic %) in the range of composition given in parentheses; and that contains the following elements in the specified range of composition given in parentheses: chromium (15 to 20 atomic %), molybdenum (2 to 15 atomic %), tungsten (1 to 3 atomic %), boron (5 to 16 atomic %), carbon (3 to 16 atomic %), and the balance iron; and applying said amorphous metal to the surface by a spray.

Abstract: A method of coating a surface comprising providing a source of amorphous metal that contains manganese (1 to 3 atomic %), yttrium (0.1 to 10 atomic %), and silicon (0.3 to 3.1 atomic %) in the range of composition given in parentheses; and that contains the following elements in the specified range of composition given in parentheses: chromium (15 to 20 atomic %), molybdenum (2 to 15 atomic %), tungsten (1 to 3 atomic %), boron (5 to 16 atomic %), carbon (3 to 16 atomic %), and the balance iron; and applying said amorphous metal to the surface by a spray.

Abstract: A system for coating a surface comprises providing a source of amorphous metal, providing ceramic particles, and applying the amorphous metal and the ceramic particles to the surface by a spray. The coating comprises a composite material made of amorphous metal that contains one or more of the following elements in the specified range of composition: yttrium (?1 atomic %), chromium (14 to 18 atomic %), molybdenum (?7 atomic %), tungsten (?1 atomic %), boron (?5 atomic %), or carbon (?4 atomic %).

Abstract: A system for coating a surface comprises providing a source of amorphous metal, providing ceramic particles, and applying the amorphous metal and the ceramic particles to the surface by a spray. The coating comprises a composite material made of amorphous metal that contains one or more of the following elements in the specified range of composition: yttrium (?1 atomic %), chromium (14 to 18 atomic %), molybdenum (?7 atomic %), tungsten (?1 atomic %), boron (?5 atomic %), or carbon (?4 atomic %).

Abstract: The invention provides oxidation resistant coatings for transition metal substrates and transition metal alloy substrates and method for producing the same. The coatings may be multilayered, multiphase coatings or gradient multiphase coatings. In some embodiments the transition metal alloys may be boron-containing molybdenum silicate-based binary and ternary alloys. The coatings are integrated into the substrates to provide durable coatings that stand up under extreme temperature conditions.

Abstract: A system for coating a surface comprises providing a source of amorphous metal, providing ceramic particles, and applying the amorphous metal and the ceramic particles to the surface by a spray. The coating comprises a composite material made of amorphous metal that contains one or more of the following elements in the specified range of composition: yttrium (?1 atomic %), chromium (14 to 18 atomic %), molybdenum (?7 atomic %), tungsten (?1 atomic %), boron (?5 atomic %), or carbon (?4 atomic %).

Abstract: The invention provides oxidation resistant coatings for transition metal substrates and transition metal alloy substrates and method for producing the same. The coatings may be multilayered, multiphase coatings or gradient multiphase coatings. In some embodiments the transition metal alloys may be boron-containing molybdenum silicate-based binary and ternary alloys. The coatings are integrated into the substrates to provide durable coatings that stand up under extreme temperature conditions.

Abstract: The invention provides oxidation resistant coatings for transition metal substrates and transition metal alloy substrates and method for producing the same. The coatings may be multilayered, multiphase coatings or gradient multiphase coatings. In some embodiments the transition metal alloys may be boron-containing molybdenum silicate-based binary and ternary alloys. The coatings are integrated into the substrates to provide durable coatings that stand up under extreme temperature conditions.

Abstract: The invention provides oxidation resistant coatings for transition metal substrates and transition metal alloy substrates and method for producing the same. The coatings may be multilayered, multiphase coatings or gradient multiphase coatings. In some embodiments the transition metal alloys may be boron-containing molybdenum silicate-based binary and ternary alloys. The coatings are integrated into the substrates to provide durable coatings that stand up under extreme temperature conditions.

Abstract: A process of preparing aligned, in-situ, two-phase single crystal alloys of titanium, aluminum and niobium which comprises growing the alloys at rates of about 3.0 mm. to about 6.0 mm. per hour by rotating a seed rod alloy consisting essentially of Ti-43 to 45 Al-10 to 12 Nb+0.5 Si, in atomic percent, at about 7.75 to 8.25 RPM while in contact with a rotating feed rod alloy consisting essentially of Ti-43 to 45 Al-10 to 12 Nb, in atomic-percent, rotating at about 5.75 to 6.25 RPM in an atmosphere of substantially pure argon at melt temperatures ranging from about 1650° C. to 1750° C. to obtain two-phase single crystal alloys of Ti-43 to 45Al-10 to 12 Nb characterized as having improved ductility, excellent oxidation resistance, and high-temperature creep strength. These alloys are particularly useful for manufacturing high-temperature material components for internal combustion engines, gas turbines, and advanced aircraft engines.

Abstract: A debonding layer is formed on fibers such as silicon carbide fibers by forming a thin film of a metal such as nickel or iron on the silicon carbide fibers and then annealing at a temperature of about 350-550° C. to form a debond layer of a metal silicide and carbon. These fibers having the debond coating can be added to composite forming materials and the mixture treated to form a consolidated composite. A one heating-step method to form a consolidated composite involves inserting the silicon carbide fibers with just the initial metal film coating into the composite forming materials and then heating the mixture to form the debond coating in situ on the fibers and to form the consolidated composite. Preferred heating techniques include high temperature annealing, hot-pressing, or hot isostatic pressing (HIP).

Abstract: Compositions and methods for obtaining nanocrystal dispersed amorphous alloys are described. A composition includes an amorphous matrix forming element (e.g., Al or Fe); at least one transition metal element; and at least one crystallizing agent that is insoluble in the resulting amorphous matrix. During devitrification, the crystallizing agent causes the formation of a high density nanocrystal dispersion. The compositions and methods provide advantages in that materials with superior properties are provided.

Abstract: Compositions and methods for obtaining nanocrystal dispersed amorphous alloys are described. A composition includes an amorphous matrix forming element (e.g., Al or Fe); at least one transition metal element; and at least one crystallizing agent that is insoluble in the resulting amorphous matrix. During devitrification, the crystallizing agent causes the formation of a high density nanocrystal dispersion. The compositions and methods provide advantages in that materials with superior properties are provided.

Abstract: A debonding layer is formed on fibers such as silicon carbide fibers by fing a thin film of a metal such as nickel or iron on the silicon carbide fibers and then annealing at a temperature of about 350-550.degree. C. to form a debond layer of a metal silicide and carbon. These fibers having the debond coating can be added to composite forming materials and the mixture treated to form a consolidated composite. A one heating-step method to form a consolidated composite involves inserting the silicon carbide fibers with just the initial metal film coating into the composite forming materials and then heating the mixture to form the debond coating in situ on the fibers and to form the consolidated composite. Preferred heating techniques include high temperature annealing, hot-pressing, or hot isostatic pressing (HIP).

Abstract: The Droplet Emulsion Technique is used to produce droplets of bulk metal or metal alloys containing inoculant particles. Heterogeneous nucleation responses are then separated and identified with variances in inoculant chemistry, size, morphology, and surface conditions in the different droplets. Differential Thermal Analysis (DTA) is used to detect and to correlate thermal signals generated from as little as 50 droplets 75-100 .mu.m in size, allowing the separation of signals generated by a minor fraction of the total droplet population. Quenching treatments are used on the samples during thermal analysis to retain the original solidification microstructures produced from effective inoculation. Differences between droplet solidification microstructures preserved from the quenching treatments allow for visual identification of effective and ineffective inoculant particles.

Abstract: Patterned structures of submicron dimension formed of supported or unsupported amorphous metals having submicron feature sizes characterized by etching behavior sufficient to allow delineation of sharp edges and smooth flat flanks, resistance to time-dependent dimensional changes caused by creep, flow, in-diffusion of unwanted impurities, out-diffusion of constituent atoms, void formation, grain growth or phase separation and resistance to phase transformations or compound formation.