Manufacturing Industry
SHOCK WAVES INCREASE SUPERCONDUCTOR CURRENT CARRYING CAPACITY
Advanced Ceramics Report, June, 1990
Exposure to shock waves substantially increases a high temperature super- conductor's capacity for carrying current, US researchers claim.
The scientists from the Lawrence Livermore National Laboratory in California use a gas powered gun to fire lightweight plastic projectiles at powder samples of bismuth strontium copper oxide. The shock wave produced deforms the material creating tiny defects in its crystal structure, they say.
Measurements show that the treated materials carry higher superconducting currents when exposed to magnetic fields. The researchers believe this is because the defects pin the lines of magnetic flux passing through the superconductor.
One of the team, William J. Nellis, says scientists have tried other techniques to create...
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