Magnetostriction device

Abstract

A magnetostriction device is made such that an impregnated composition material, such as phenol resin, a resin in which an inorganic material such as silica is dispersed into a phenol resin, an epoxy based resins or an acrylic resin is impregnated and caked into holes of a magnetostrictive sintered material manufactured by a powder metallurgy method. This magnetostriction device has improved mechanical strength against an external force.

1 . A magnetostriction device comprising an impregnated composition material impregnated into and caked into holes of a magnetostrictive sintered material manufactured by a powder metallurgy method.  
     
     
         2 . A magnetostriction device comprising a magnetostrictive sintered material of Tb 0.3 Dy 0.7 Fe 2  made of powder ground from Fe 2 Tb, Fe 2 Dy by a powder metallurgy method, and an impregnated composition material being impregnated and caked into holes of said magnetostrictive sintered material.  
     
     
         3 . the magnetostriction device according to  claim 1  or  2 , wherein said impregnated composition material is one of phenol resin, a resin in which an inorganic material such as silica is dispersed into a phenol resin, an epoxy based resin, and an acrylic resin.  
     
     
         4 . A magnetostriction device according to  claim 1  or  2 , wherein said impregnated composition material has a powder-like material with a high magnetic permeability dispersed thereto.