New possibilities of utilizing metallic glasses as torque sensors

Abstract

This paper presents the new possibility of utilizing ring-shaped, ribbon wound cores made of metallic glasses as torque sensors. A novel methodology of application of a torque to the magnetoelastic sensing elements is described. In this solution, uniform torque is applied by special, nonmagnetic backings with radial grooves. These backings are glued to the core. The developed method was applied for the measurement of the influence of torque on magnetic properties of Fe-based, metallic glass (Fe/sub 78/Si/sub 13/B/sub 9/) in as-quenched and annealed state. Results presented in the paper confirm that this method can be utilized in construction of the new class of magnetoelastic torque sensors.