A composite conductor with high-purity aluminium filaments in an aluminium alloy matrix has been developed. It retains a very high electrical resistance ratio and yield strength when cooled by liquid hydrogen. In typical cryogenic magnetic applications, the aluminium composite is lighter in weight and more versatile than superconductors at any temperature, as long as large flows of cryogenic hydrogen are permissible.>
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Oberly et al. (1991) studied this question.
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