Terfenol-D
Magnetostrictive alloy / From Wikipedia, the free encyclopedia
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Terfenol-D, an alloy of the formula TbxDy1−xFe2 (x ≈ 0.3), is a magnetostrictive material. It was initially developed in the 1970s by the Naval Ordnance Laboratory in the United States. The technology for manufacturing the material efficiently was developed in the 1980s at Ames Laboratory under a U.S. Navy-funded program.[1] It is named after terbium, iron (Fe), Naval Ordnance Laboratory (NOL), and the D comes from dysprosium.