摘要:
A superconducting tape having reduced AC losses. The tape has a high temperature superconductor layer that is segmented. Disruptive strips, formed in one of the tape substrate, a buffer layer, and the superconducting layer create parallel discontinuities in the superconducting layer that separate the current-carrying elements of the superconducting layer into strips or filament-like structures. Segmentation of the current-carrying elements has the effect of reducing AC current losses. Methods of making such a superconducting tape and reducing AC losses in such tapes are also disclosed.
摘要:
A process is disclosed of preparing a template layer of a biaxially oriented material by ion beam assisted deposition upon a length of a substrate within a vacuum deposition chamber, by passing a length of substrate across a cooling block within a vacuum deposition chamber, with the cooling block configured to contact the substrate and passing a cooled liquid or gas through said cooling block during deposition of said layer of biaxially oriented material by ion beam assisted deposition upon said length of substrate. Also, a process is disclosed of preparing a template layer of a biaxially oriented material by ion beam assisted deposition upon a length of a substrate within a vacuum deposition chamber, by contacting a substrate with a cooled gas from the group of argon, oxygen, nitrogen during the ion beam assisted deposition of the biaxially oriented material within the vacuum deposition chamber, the cooled gas exiting a series of openings in a cooling block within the vacuum deposition chamber, the cooling block configured to contact the substrate.
摘要:
A superconducting article includes a substrate having an untextured metal surface; an untextured barrier layer of La2Zr2O7 or Gd2Zr2O7 supported by and in contact with the surface of the substrate; a biaxially textured buffer layer supported by the untextured barrier layer; and a biaxially textured superconducting layer supported by the biaxially textured buffer layer. Moreover, a method of forming a buffer layer on a metal substrate includes the steps of: providing a substrate having an untextured metal surface; coating the surface of the substrate with a barrier layer precursor; converting the precursor to an untextured barrier layer; and depositing a biaxially textured buffer layer above and supported by the untextured barrier layer.
摘要翻译:超导制品包括具有未结合的金属表面的基材; 不饱和的La 2 O 2 2 N 2 O 3或Gd 2 Zr 2 N的不均匀的阻挡层 由底物表面支撑并与衬底的表面相接触; 由所述非纹理化阻挡层支撑的双轴纹理缓冲层; 以及由双轴纹理缓冲层支撑的双轴织构化超导层。 此外,在金属基板上形成缓冲层的方法包括以下步骤:提供具有非纹理金属表面的基板; 用阻挡层前体涂覆基材的表面; 将前体转化为无纹理的阻挡层; 并且在非纹理化阻挡层上方并且支撑着双轴织构化的缓冲层。
摘要:
A template article including a base substrate including: (i) a base material selected from the group consisting of polycrystalline substrates and amorphous substrates, and (ii) at least one layer of a differing material upon the surface of the base material; and, a buffer material layer upon the base substrate, the buffer material layer characterized by: (a) low chemical reactivity with the base substrate, (b) stability at temperatures up to at least about 800° C. under low vacuum conditions, and (c) a lattice crystal structure adapted for subsequent deposition of a semiconductor material; is provided, together with a semiconductor article including a base substrate including: (i) a base material selected from the group consisting of polycrystalline substrates and amorphous substrates, and (ii) at least one layer of a differing material upon the surface of the base material; and, a buffer material layer upon the base substrate, the buffer material layer characterized by: (a) low chemical reactivity with the base substrate, (b) stability at temperatures up to at least about 800° C. under low vacuum conditions, and (c) a lattice crystal structure adapted for subsequent deposition of a semiconductor material, and, a top-layer of semiconductor material upon the buffer material layer.
摘要:
The present invention is directed towards a process and apparatus for epitaxial deposition of a material, e.g., a layer of MgO, onto a substrate such as a flexible metal substrate, using dual ion beams for the ion beam assisted deposition whereby thick layers can be deposited without degradation of the desired properties by the material. The ability to deposit thicker layers without loss of properties provides a significantly broader deposition window for the process.
摘要:
An article including a substrate, a layer of a metal phosphate material such as an aluminum phosphate material upon the surface of the substrate, and a layer of an oriented cubic oxide material having a rock-salt-like structure upon the metal phosphate material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon a layer of a buffer material such as a SrTixRu1-xO3 layer.
摘要:
A continuous process of forming a highly smooth surface on a metallic tape by passing a metallic tape having an initial roughness through an acid bath contained within a polishing section of an electropolishing unit over a pre-selected period of time, and, passing a mean surface current density of at least 0.18 amperes per square centimeter through the metallic tape during the period of time the metallic tape is in the acid bath whereby the roughness of the metallic tape is reduced. Such a highly smooth metallic tape can serve as a base substrate in subsequent formation of a superconductive coated conductor.