Magnetomechanical energy conversion

US4763030A · kind A · utility

Assignee

• United States of America as represented by the Secretary of the Air Force · US

Inventors

• Arthur E. Clark · Adelphi, US
• Lawrence T. Kabacoff · Columbia, US
• Howard T. Savage · Greenbelt, US
• Christine Modzelewski · Columbia, US

Key dates

• Filing date: May 24, 1984
• Grant date: Aug 9, 1988
• Expiry date: May 24, 2004

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N35/85

Abstract

A metallic glass ribbon of the formula EQU Fe.sub.w B.sub.x Si.sub.y C.sub.z wherein EQU 0.78.ltoreq.w.ltoreq.0.83, EQU 0.13.ltoreq.x.ltoreq.0.17, EQU 0.03.ltoreq.y.ltoreq.0.07, EQU 0.005.ltoreq.z.ltoreq.0.03, and EQU w+x+y+z=1, is annealed to remove mechanical strains and exposed to a magnetic field in the plane of the ribbon and transverse to the long axis of the ribbon. The resulting metalic glass ribbons have very large magnetic coupling coefficients (k.sub.33 >0.9). The treated ribbons are useful in magnetostrictive transducers and in passive listening devices such as hydrophones or pressure sensors.