摘要:
A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more.
摘要:
An Fe-based amorphous alloy of the present invention has a composition represented by formula (Fe100-a-b-c-d-eCraPbCcBdSie (a, b, c, d, and e are in terms of at %), where 0 at %≦a≦1.9 at %, 1.7 at %≦b≦8.0 at %, 0 at %≦e≦1.0 at %, an Fe content (100-a-b-c-d-e) is 77 at % or more, 19 at %≦b+c+d+e≦21.1 at %, 0.08≦b/(b+c+d)≦0.43, 0.06≦c/(c+d)≦0.87, and the Fe-based amorphous alloy has a glass transition temperature (Tg).
摘要翻译:本发明的Fe系非晶质合金具有式(Fe100-abcd-eCraPbCcBdSie(a,b,c,d,e以%计)),其中0at%≤a≤1.9 %,1.7at%≤b≤8.0at%,0at%≤e≤1.0at%,Fe含量(100-abcde)为77at%以上,19at%≤b+ c + d +e≤21.1 at%,0.08≤b/(b + c + d)≤0.43,0.06≤c/(c + d)≤0.87,Fe系非晶合金的玻璃化转变温度(Tg)。
摘要:
The present invention generally relates to microfluidics, and to spray drying and other drying techniques. Various embodiments of the invention are generally directed to systems and methods for drying fluids contained within a channel such as a microfluidic channel. For example, a fluid may be partially or completely dried within a microfluidic channel, prior to being sprayed into a collection region. In some embodiments, the fluids may be dried relatively rapidly, resulting in spray-dried particles that are partially or completely amorphous. For instance, the fluid may contain salts, drugs, small molecules, ceramics, inorganic species, metals, sugars, polymers, etc., which may be dried to form partially or completely amorphous nanoparticles containing these species.
摘要:
A method for preparing an alloy, including mixing elemental powders of Nb and Zr to obtain a powder mixture, and mechanical alloying to obtain an alloyed powder mixture, where the alloyed powder is more than 50% amorphous. The spark plasma sintering machine was used for the consolidation of the Nb60Zr40 sample prepared by mechanical alloying. An Nb—Zr alloy composition obtained by the method, having an average crystallite size of 18 to 26 nm, hardness of 580.
摘要:
Disclosed herein are methods of combining at least one bulk-solidifying amorphous alloy and at least one additional metal or alloy of a metal to provide a composite preform. The composite preform then is heated to produce an alloy of the bulk-solidifying amorphous alloy and the at least one additional metal or alloy of the metal.
摘要:
Provided is a method for easily manufacturing large volumes of a metallic glass nanowire with an extremely small diameter. This metallic glass nanowire manufacturing method is characterized in that a melted metallic glass or a master alloy thereof is gas-atomized in a supercooled state.
摘要:
Described herein is a method of combining discrete pieces of BMG in to a BMG feedstock that has at least one dimension greater than a critical dimension of the BMG, by methods such as thermoplastic forming, pressing, extruding, folding or forging. Other embodiments relate to a bulk metallic glass (BMG) component or feedstock having discrete pieces of a BMG, wherein the BMG component or feedstock has at least one dimension greater than a critical dimension of the BMG.
摘要:
The design of biodegradable magnetic nanoparticles for use in in-vivo biomedical applications. The particles can include Fe in combination with one or more of Mg, Zn, Si, C, N, and P atoms or other particles. The nanoparticles can be degraded in-vivo after usage. The nanoparticles can cease heating upon reaching a predetermined temperature or other value.
摘要:
A composite powder for a deposition of a composite coating comprises a nonmetallic component and a metallic component, the metallic component having an amorphous structure or a nanocrystalline structure. The metallic component may include an amorphous metallic alloy. The metallic alloy may include constituents having the amorphous structure. The metallic component may include a combination of the metallic alloy existing in the amorphous state and constituents of the amorphous metallic alloy in the amorphous state. The composite metal-ceramic powders are used for depositing composite coatings on a selected surface. Disclosed are several methods and systems for producing such composite powders. Disclosed are also several methods and systems for depositing composite coatings. Advantageously, the deposited coatings exhibit high corrosion resistance, high wear resistance, and excellent structural properties.
摘要:
Magnet cores pressed using a powder of nanocrystalline or amorphous particles and a pressing additive should be characterized by minimal iron losses. These particles have first surfaces represented by the original strip surfaces and second surfaces represented by surfaces produced in a pulverization process, the overwhelming majority of these second particle surfaces being smooth cut or fracture surfaces without any plastic deformation, the proportion T of areas of plastic deformation of the second particle surfaces being 0≦T≦0.5.