摘要:
A process for manufacturing ceramic-metal composite material, comprises dissolving ceramic powder into water to obtain an aqueous solution of ceramic; mixing metal powder having a multimodal particle size where largest particle size is one fourth of the minimum dimension of a device, with the aqueous solution of ceramic to obtain a powder containing ceramic precipitated on the surface of metal particles; mixing the powder containing ceramic precipitated on the surface of the metal particles, with ceramic powder having a particle size below 50 μm, to obtain a powder mixture; adding saturated aqueous solution of ceramic to the powder mixture to obtain an aqueous composition containing ceramic and metal; compressing the aqueous composition to form a disc of ceramic-metal composite material containing ceramic and metal; and removing water from the ceramic-metal composite material; wherein ceramic content of the disc is 10 vol-% to 35 vol-%. Alternatively, ceramic-ceramic composite material may be manufactured.
摘要:
A core-shell structured alloy powder for additive manufacturing, an additively manufactured precipitation dispersion strengthened alloy component, and a method for additively manufacturing the component are provided. The alloy powder comprises a plurality of particles, where one or more of the plurality of particles comprise an alloy powder core and an oxygen or nitrogen rich shell disposed on at least a portion of the alloy powder core. The alloy powder core comprises an alloy constituent matrix with one or more reactive elements, where the reactive elements are configured to react with oxygen, nitrogen, or both. The alloy constituent matrix comprises stainless steel, an iron based alloy, a nickel based alloy, a nickel-iron based alloy, a cobalt based alloy, a copper based alloy, an aluminum based alloy, a titanium based alloy, or combinations thereof. The alloy constituent matrix comprises reactive elements present in a range from about 0.01 weight percent to 10 weight percent of a total weight of the alloy powder.
摘要:
A nickel-based superalloy particularly suitable for the fabrication of mechanical components for a piece of turbomachinery that it comprises the following elements in percentage by weight: chromium between 3% and 7%; tungsten between 3% and 15%; tantalum between 4% and 6%; aluminum between 4% and 8%; carbon less than 0.8%; the remaining percentage of nickel plus impurities.
摘要:
A powder metal compact is disclosed. The powder metal compact includes a cellular nanomatrix comprising a nanomatrix material. The powder metal compact also includes a plurality of dispersed particles comprising a particle core material that comprises an Mg—Zr, Mg—Zn—Zr, Mg—Al—Zn—Mn, Mg—Zn—Cu—Mn or Mg—W alloy, or a combination thereof, dispersed in the cellular nanomatrix.
摘要:
A powder metal compact is disclosed. The powder metal compact includes a cellular nanomatrix comprising a nanomatrix material. The powder metal compact also includes a plurality of dispersed particles comprising a particle core material that comprises an Mg—Zr, Mg—Zn—Zr, Mg—Al—Zn—Mn, Mg—Zn—Cu—Mn or Mg—W alloy, or a combination thereof, dispersed in the cellular nanomatrix.
摘要:
The invention provides a nanocomposite thermoelectric conversion material (1) in which the matrix has a polycrystalline structure, and crystal grains (10) and a crystal grain boundary phase (12) of a different composition are present therein, and in which the same type of phonon-scattering particles (14) are dispersed within the crystal grains (10) and the crystal grain boundary phase (12).
摘要:
Disclosed is a method of manufacturing a metal matrix composite in which oxide nanoparticles are dispersed. Metal matrix composite powders in which oxide nanoparticles are dispersed are prepared. Gibbs free energy of the oxide nanoparticles is greater than that of an oxide of a metal matrix. A bulk processed material is manufactured from the composite powders through hot forming or a cast material is manufactured by inputting the composite powder into a molten base metal and then rapidly stirring a resultant mixture. The bulk processed material or the cast material is heat-treated so that atoms of the metal matrix and atoms of the oxide nanoparticles mutually diffuse. Oxygen atoms originating from the oxide nanoparticles are diffused and dispersed in the metal matrix.
摘要:
To manufacture a ceramic coated article, at least one surface of a conductive article is roughened to a roughness of approximately 100 micro-inches (μin) to approximately 300 μin. The conductive article may then be heated and coated with a ceramic coating comprising a yttrium containing oxide to a thickness of approximately 10-40 mil.
摘要:
Antibacterial metallic nanofoams, substrates having the nanofoam coated thereon, methods for preventing, inhibiting, and/or killing bacterial growth using the metallic nanofoams, and compositions and methods for making the metallic nanofoams.
摘要:
A hard composite composition may comprise a binder and a polymodal blend of matrix powder. The polymodal blend of matrix powder may have at least one first local maxima at a particle size of about 0.5 nm to about 30 μm, at least one second local maxima at a particle size of about 200 μm to about 10 mm, and at least one local minima between a particle size of about 30 μm to about 200 μm that has a value that is less than the first local maxima.