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Rare-Earth Industry Overview and Defense Applications by ... - SME

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Sonar Transducers for Submarines<br />

• Terfenol-D ®<br />

Tb-Fe-Ni alloy with Dy - magnetostrictive alloy<br />

• Magnetic domains in the crystal rotate when a magnetic field<br />

is applied which creates a sonar ping.<br />

Credit: General Dynamics Corporation — Electric Boat

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