Publications (2)0 Total impact
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Article: Synthesis and Processing of $MgB_2$ powders and wires
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ABSTRACT: Sintered powders and wires of superconducting $MgB_2$ have been fabricated under a variety of conditions in order to determine details of the diffusion of the $Mg$ into $B$ and to study the types of defects that arise during growth. For samples prepared by exposure of boron to $Mg$ vapor at $950^{\circ}C$, the conversion of particles of less than $100\mu m$ size particles to $MgB_2$ is complete in about $2 h$. The lattice parameters of the $MgB_2$ phase determined from X-ray are independent of the starting stoichiometry and the time of reaction. Wire segments of $MgB_2$ with very little porosity have been produced by reacting $141 \mu m$ diameter boron fibers in an atmosphere of excess $Mg$ vapor at $950^{\circ}C$. Defects in the reacted fibers are predominantly the voids left as the boron is converted to $MgB_2$.03/2001; -
Article: Synthesis and processing of MgB2 powders and wires
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ABSTRACT: Sintered powders and wires of superconducting MgB2 have been fabricated under a variety of conditions in order to determine details of the diffusion of the Mg into B and to study the types of defects that arise during growth. For samples prepared by exposure of boron to Mg vapor at 950°C, the conversion of particles of less than 100 μm size to MgB2 is complete in about 2 h. The lattice parameters of the MgB2 phase determined from X-ray are independent of the starting stoichiometry and the time of reaction. Wire segments of MgB2 with very little porosity have been produced by reacting 141 μm diameter boron fibers in an atmosphere of excess Mg vapor at 950°C. Defects in the reacted fibers are predominantly voids left as the boron is converted to MgB2.Physica C: Superconductivity.
