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    • 2. 发明授权
    • Constrained filament electrolytic anode and process of fabrication
    • 约束长丝电解阳极及其制造工艺
    • US5869196A
    • 1999-02-09
    • US931145
    • 1997-09-16
    • James WongMark K. RudziakTerence Wong
    • James WongMark K. RudziakTerence Wong
    • B21C23/00B21C1/00B21C37/04B32B20060101B32B5/18B32B15/00H01G9/04H01G9/042H01G9/052
    • H01G9/042B21C37/047Y10T29/49002Y10T428/12479Y10T428/12806Y10T428/12819
    • Porous metal compacts suitable for use as electrodes are formed through the reduction of a metal billet consisting of multiple filaments of an appropriate valve metal, preferably tantalum, contained within, and spaced apart by, a ductile metal, preferably copper. The filaments are elongated and substantially parallel within the billet. The array of valve metal filaments within the billet is surrounded by a continuous layer of valve metal. This metal is preferably, but not necessarily, the same as that which forms the filaments. The valve metal layer preferably completely surrounds the filament array circumferentially and runs the full length of the filaments. The layer is separated from the array by the same ductile metal that serves to separate the filaments from each other. This same ductile metal forms the surface of the billet, preventing exposure of the valve metal layer. The billet is reduced by conventional means, such as extrusion and wire drawing, the composite product is cut into short lengths, and the ductile metal separating the valve metal components of the composite is removed, preferably by leaching in mineral acids. The filaments are constrained within the valve metal tube, making handling during subsequent capacitor manufacture much less difficult than if the filaments were allowed to move freely.
    • 适合用作电极的多孔金属压块通过还原金属坯料而形成,所述金属坯料由包含在延性金属(优选铜)中并由间隔开的适当的阀金属,优选钽构成。 长丝细长并在坯料内基本平行。 钢坯内的阀金属细丝阵列被一个连续的金属层包围。 该金属优选但不一定与形成长丝的金属相同。 阀金属层优选地沿圆周方向完全围绕细丝阵列,并延伸长丝的全长。 该层通过相同的延展性金属与阵列分离,其用于将长丝彼此分离。 该相同的延性金属形成坯料的表面,防止阀金属层的暴露。 通过常规方式,例如挤出和拉丝,将复合材料切割成短长度,并且分离复合材料的阀金属组分的延性金属,优选通过在无机酸中浸出而被除去。 长丝被限制在阀金属管内,使得随后的电容器制造期间的处理比如果允许细丝自由移动困难得多。
    • 3. 发明授权
    • Nb3Al superconductor and method of manufacture
    • Nb3Al超导体及其制造方法
    • US06699821B2
    • 2004-03-02
    • US10119353
    • 2002-04-09
    • Mark K. RudziakLeszek R. MotowidloTerence Wong
    • Mark K. RudziakLeszek R. MotowidloTerence Wong
    • B22F320
    • C22C27/02B22F3/1216B22F5/12B22F2998/00B22F2998/10H01L39/2409Y10S420/901B22F3/04B22F2202/01B22F1/0003B22F3/18B22F3/20
    • A Nb3Al superconducting wire and method for fabricating the same wherein Nb and Al powders in combination, or Nb—Al alloy powders are encapsulated in a metal tube, preferably copper or copper-alloy (e.g., CuNi), and the resultant composite is processed by conventional means to fine wire. Multifilamentary composites are produced by rebundling of the powder-filled wires into metal tubes followed by conventional processing to wire of a desired size. It is required for the use of Nb and Al powders in combination that the Nb and Al powder particle size be less than 100 nm. In the use of Nb—Al alloy powders, it is preferred, but not required, that the powder particle size be similarly of a nanometer scale. The use of nanometer-scale powders is beneficial to wire fabrication, allowing the production of long wire piece-lengths. At final wire size, the wires produced by practice of the present invention are heat treated at temperatures below the melting point of copper (1083° C.), with the heat treatment causing conversion of the powder cores or filaments to the A15 superconductor Nb3Al. The resulting superconducting wires display critical superconducting properties previously achievable only by methods employing temperatures well in excess of the melting point of copper.
    • 一种Nb3Al超导线及其制造方法,其中组合的Nb和Al粉末或Nb-Al合金粉末封装在金属管中,优选铜或铜合金(例如CuNi)中,并且所得复合材料由 常规手段细线。 通过将粉末填充的线重新连接到金属管中,然后通过常规加工成所需尺寸的导线来生产多丝复合材料。 需要组合使用Nb和Al粉末,Nb和Al粉末粒度小于100nm。 在使用Nb-Al合金粉末时,优选但不是要求粉末粒径类似于纳米级。 使用纳米级粉末有利于电线制造,允许生产长的电线片长度。 在最终丝尺寸下,通过实施本发明生产的丝线在低于铜熔点(1083℃)的温度下进行热处理,热处理引起粉末芯或细丝转化为A15超导体Nb3Al。 所得到的超导线材显示出仅通过使用超过铜熔点的温度的方法才能达到的临界超导特性。