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Second-Generation HTS Conductors

Chia sẻ: Nguyen Nhi | Ngày: | Loại File: PDF | Số trang:366

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The discovery of high temperature superconductors (HTS) in 1986 by two IBM scientists led to an unprecedented explosion of research and development efforts world-wide because of the significant potential for practical applications offered by these materials. However, the early euphoria created by the exciting prospects was dampened by the daunting task of fabricating these materials into useful forms with acceptable superconducting properties. Progress towards this goal has been hindered by many intrinsic materials problems, such as weak-links, flux-creep, and poor mechanical properties. The earliest studies of critical current density in HTS materials revealed that for a polycrystalline material containing a distribution of grain boundaries is much lower than that for...

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