FORMATION OF BISMUTH STRONTIUM CALCIUM COPPER OXIDE SUPERCONDUCTORS
    4.
    发明申请
    FORMATION OF BISMUTH STRONTIUM CALCIUM COPPER OXIDE SUPERCONDUCTORS 审中-公开
    二氧化锡钙氧化物超导体的形成

    公开(公告)号:US20150270471A1

    公开(公告)日:2015-09-24

    申请号:US14433986

    申请日:2013-10-08

    Abstract: A BÏ2212 article may be formed by mixing metallic precursor powders including bismuth, strontium, calcium and copper in an oxygen-free atmosphere, mechanically alloying the metallic precursor powders in an oxygen-free atmosphere, and heating the metallic precursor alloy according to a temperature profile. The profile may include a ramp-up stage during which the alloy is heated to a peak temperature in an oxygen-free atmosphere, a dwell stage during which the alloy is held at the peak temperature for a dwell time, and a ramp-down stage during which the alloy is cooled from the peak temperature. During at least a portion of the dwell stage, the oxygen-free atmosphere is switched to an oxygen-inclusive atmosphere, wherein the alloy is oxidized to form a superconducting oxide, which may be sintered during or after oxidation. The alloy may be formed into a shape, such as a wire, prior to oxidizing.

    Abstract translation: 可以通过在无氧气氛中混合包括铋,锶,钙和铜的金属前体粉末,在无氧气氛中机械合金化金属前体粉末,并根据温度曲线加热金属前体合金来形成BÏ2212制品 。 该轮廓可以包括加速阶段,在该阶段期间,合金在无氧气氛中被加热至峰值温度,在此期间合金保持在峰值温度下停留时间的停留阶段,以及斜坡下降阶段 在此期间,合金从峰值温度冷却。 在停留阶段的至少一部分期间,将无氧气氛切换到含氧气氛,其中该合金被氧化以形成可在氧化期间或之后烧结的超导氧化物。 在氧化之前,该合金可以形成为诸如电线的形状。

    METHOD AND APPARATUS FOR INCREASING THE RESOLUTION IN ADDITIVELY MANUFACTURED THREE-DIMENSIONAL ARTICLES
    5.
    发明申请
    METHOD AND APPARATUS FOR INCREASING THE RESOLUTION IN ADDITIVELY MANUFACTURED THREE-DIMENSIONAL ARTICLES 有权
    增加制造三维文章中分辨率的方法和装置

    公开(公告)号:US20140370323A1

    公开(公告)日:2014-12-18

    申请号:US14349052

    申请日:2012-12-04

    Applicant: Arcam AB

    Inventor: Ulf Ackelid

    Abstract: A method for increasing the resolution when forming a three-dimensional article through successive fusion of parts of a powder bed, said method comprising providing a vacuum chamber, providing an electron gun, providing a first powder layer on a work table inside said vacuum chamber, directing an electron beam from said electron gun over said work table causing the powder layer to fuse in selected locations to form a first cross section of said three-dimensional article, providing a second powder layer on said work table, directing the electron beam over said work table causing said second powder layer to fuse in selected locations to form a second cross section of said three-dimensional article, reducing the pressure in the vacuum chamber from a first pressure level to a second pressure level between the providing of said first powder layer and said second powder layer.

    Abstract translation: 一种用于通过粉末床部分的连续融合来形成三维制品时的分辨率的方法,所述方法包括提供真空室,提供电子枪,在所述真空室内的工作台上提供第一粉末层, 将来自所述电子枪的电子束引导到所述工作台上,使粉末层在所选择的位置熔化以形成所述三维制品的第一横截面,在所述工作台上提供第二粉末层, 使所述第二粉末层在所选择的位置熔合以形成所述三维制品的第二横截面,从而在提供所述第一粉末层之间将真空室中的压力从第一压力水平降低到第二压力水平 和所述第二粉末层。

    Peritectic, metastable alloys containing tantalum and nickel
    8.
    发明授权
    Peritectic, metastable alloys containing tantalum and nickel 失效
    包含钽和镍的包晶,亚稳态合金

    公开(公告)号:US07828913B1

    公开(公告)日:2010-11-09

    申请号:US11196140

    申请日:2005-08-03

    Abstract: A metastable, peritectic alloy contains nickel in addition to tantalum and, optionally, niobium and/or tungsten. The alloy typically contains between from about 60 to 70 weight percent nickel and between from about 30 to 40 weight percent tantalum. The alloy may be prepared by melting the nickel and tantalum and/or a tantalum-nickel alloy under an inert gas or under a vacuum to a temperature of approximately 1475° C. to about 1550° C. The molten metal is then poured through a ceramic nozzle fitted with gas jets to atomize the molten stream into small droplets. The metastable characteristics of the corrosion resistant alloy are attained due to the rapid solidification of the molten alloy during the atomization process. The metastable alloy may further be used as cermet binder wherein another metal or interstitial alloy is incorporated by communition and/or blending into the alloy. This provides a unique system of materials that will impart even higher oxidation resistance and/or chemical and/or wear resistance than the metastable alloy per se. Surface treatments, such as pulse laser, transferred arc plasma, etc. of the peritectic, metastable alloy further may serve to regenerate a surface containing the alloy which has been exposed to harsh environments.

    Abstract translation: 亚稳态包晶合金除了钽和任选的铌和/或钨之外还含有镍。 该合金通常含有约60至70重量%的镍和约30至40重量%的钽。 合金可以通过在惰性气体或真空下将镍和钽和/或钽镍合金熔化至约1475℃至约1550℃的温度来制备。然后将熔融金属通过 陶瓷喷嘴配有气体射流,以将熔融物流雾化成小液滴。 由于在雾化过程中熔融合金的快速固化,可获得耐腐蚀合金的亚稳特性。 亚稳态合金可以进一步用作金属陶瓷粘合剂,其中通过共混和/或共混到合金中并入其中的另一种金属或间隙合金。 这提供了一种独特的材料系统,其能够赋予比亚稳态合金本身更高的抗氧化性和/或耐化学性和/或耐磨性。 包晶亚稳态合金的脉冲激光,转移电弧等等的表面处理还可用于再生含有暴露于恶劣环境的合金的表面。

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