Abstract:
A device and method for making a persistent joint allowing end terminations of superconducting MgB 2 wire to be joined with a superconducting bridge. Superconducting electromagnetic coils may be joined in series or joining of coil assemblies to current sources and the two ends of a persistent switch. The device includes wire filaments with end preparation exposing reacted MgB 2 , inserted into a block and surrounded with Mg+B and/or MgB 2 in powder, solid, slurry or sol-gel form and subsequently reacted to establish a bridge of superconducting MgB 2 electrically connecting the superconducting MgB 2 wires. Autonomous operation of the superconducting background magnet coils in magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) devices are allowed, or similar devices where autonomous operation of an MgB 2 based superconducting magnet is required. The low resistant joint will also be beneficial for other superconducting applications such as fault current limiters, motors, generators, etc.
Abstract:
A superconducting coil comprises a plurality of windings. Each winding comprises at least one superconducting segment having an exposed area containing a granular superconducting substance. A junction electrically connects at least one superconducting segment of one winding to at least one superconducting segment of another winding. The junction is formed by coupling the granular superconducting substance of the exposed area of the at least one superconducting segment of the one winding to the granular superconducting, substance of the exposed area of the at least one superconducting segment of the other winding. In an embodiment, the exposed areas are positioned to face each other.
Abstract:
A superconducting article includes a first superconductive segment having a nominal thickness t n1 , a second superconductive segment having a nominal thickness t n2 , and a joint region comprising a splice connecting the first and second superconductive segments together. The splice overlies portions of both the first and second superconductive segments along the joint region, the joint region having a thickness t jr , wherein t jr is not greater than at least one of 1.8t n1 and 1.8t n2 .
Abstract translation:一种超导制品包括具有标称厚度t n1 n1的第一超导部分,具有标称厚度t N 2 N 2的第二超导部分,以及包括连接第一 和第二超导部分在一起。 接合部沿着接合区域覆盖第一和第二超导部分的两部分,接合区域具有厚度t N,其中,t jr i>不大于至少一个 为1.8t×n1和1.8t 。
Abstract:
La presente invención describe un material superconductor TrBCO/TrBCO-Ag/TrBCO resultante de la unión artificial de piezas cerámicas monocristalinas que responden a la fórmula TrBa 2 Cu 3 O7-Tr 2 BaCuO 5 donde Tr corresponde con cualquier elemento de las denominadas Tierras raras o Ytrio. Asimismo se describe el procedimiento de unión de dichas piezas mediante el empleo de una lámina o un recubrimiento de plata como agente fundente. Dicho procedimiento permite obtener materiales con la misma orientación cristalográfica que las piezas cerámicas superconductoras que se desean unir. Este proceso permite fabricar productos cerámicos superconductores con formas complejas en los cuales las corrientes críticas a través de las uniones permanecen tan elevadas como las de las cerámicas originales antes de unirse. Los productos superconductores fabricados con dicha metodología pueden adoptar formas complejas y por lo tanto pueden ser integrados en dispositivos magnéticos, electromagnéticos y electromecánicos diversos con características mejoradas.
Abstract:
A method for joining high temperature superconducting components while minimizing critical current degradation is provided. The articles formed have critical currents that are at least 80 % of the critical current of the high temperature superconducting components. The invention further provides splicing geometries that facilitate wrapping joined components around a mandrel, tube or the like with minimal critical current degradation and without kinking or flexion of the joined components.
Abstract:
The invention relates to a superconducting connection between a pair of superconducting ceramic oxide pieces and a process for forming such a connection, each of the pieces having been formed by combining the metallic elements of the superconducting oxide in substantially the stoichiometric proportions needed to form the superconducting oxide into a precursor and forming the precursor into a shaped piece. The process comprises the steps of: contacting each of the shaped pieces with the other (1, 2 and 4 in fig. 1A) connecting each of the shaped pieces to the other by means for forming a metallurgical bond (6) between the shaped pieces (2) and (4) and oxidizing the connected shaped pieces under conditions sufficient to oxidize the metallic elements to the superconducting oxide illustrated in (fig. 1C). In other embodiments of the invention, the process is for forming a superconducting connection between a pair of pieces having a superconducting ceramic oxide/noble metal composition; or for forming a joint between a superconducting ceramic oxide and a normal conductor.