Bulky Material Process Based on Rapid-Solidified Magnetostrictive GALFENOL

Abstract

Magnetostrictive bulky Fe-17at%Ga alloy was fabricated by combining lamination of rapid-solidified ribbons (80 μm in thickness) and spark plasma sintering/joining (SPSJ). The laminated sample maintained the polycrystalline texture of columnar grains in as-spun ribbons because of the feature of short time and low temperature heating process in SPSJ. The excellent sintered sample was obtained under a condition of the compressive stress of 100 MPa at the temperature 973K. The magnetostriction considerably depended on compressive pre-stress for specimen and reached about 100 ppm which is a half of value obtained from the ribbon sample.