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Carbon‐encapsulated crystalline boron nanopowder and coarse magnesium powder are used as inexpensive tailored starting materials for the fabrication of high‐performance MgB2 superconducting wire. A low sintering temperature leads to a high critical current density, as a result of nanometer‐sized boron powder, surface oxidation preclusion by carbon encapsulation, and grain alignment by elongated magnesium...
Low‐cost high‐performance superconducting MgB2 wires are demonstrated using tailored starting materials.46 As reported on page 4942 by Jung Ho Kim, Sangjun Oh, and co‐workers, nanoengi‐neered carbon‐encapsulated boron powder allows for low sintering temperature and prevents surface oxidation. Furthermore, grain alignment by elon‐gated magnesium coarse powder enhances the critical current density up...
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