Magnetostrictive composites and process for manufacture by dynamic compaction
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United States of America Patent
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Jun 6, 2000
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N/A
app pub date -
Sep 26, 1997
filing date -
Sep 26, 1997
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Abstract
A metal-matrix composite of magnetostrictive powder is manufactured by dynamic compaction, such as that provided by the shock waves of an explosive, from a magnetostrictive powder in the presence of a matrix-forming metal. Under the conditions of dynamic compaction, property compromising phases between the powder and the binding metal are not formed, resulting in a composite essentially free of these phases. The composites may be formed by coating a magnetostrictive powder with a matrix-forming metal by a sputtering process and dynamically compacting the coated powder. A coated powder may also be made by sputtering a layered composite of metal-magnetostrictive material-metal, and grinding the layered composite. Metal-matrix composites may also be made by mixing the matrix-forming metal with a magnetostrictive powder and dynamically compressing the mixture. Metal-matrix composites of amorphous magnetostrictive powders may be annealed in the presence of a magnetic field.
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