Giant Stress Impedance Magnetoelastic Sensors Employing Soft Magnetic Amorphous Ribbons.

Area of Science:

• Materials Science
• Physics
• Engineering

Background:

• Soft magnetic amorphous alloys are crucial for technologies like magnetic field detection and non-contact positioning.
• Their amorphous structure provides excellent mechanical properties, including high Young modulus and tensile strength.
• Magnetoelastic applications leverage these properties, particularly the giant stress impedance (GSI) effect for sensor development.

Purpose of the Study:

• To analyze the giant stress impedance (GSI) effect in specific soft magnetic amorphous ribbons.
• To explore the development of practical devices utilizing the GSI effect.
• To demonstrate the application of GSI sensors for characterizing dimensional variations and measuring fluid flow rates.

Main Methods:

• Rapid quenching technique to produce soft magnetic amorphous alloy ribbons.
• Analysis of the giant stress impedance (GSI) effect in (Co0.93Fe0.07)75Si12.5B12.5 and (Co0.95Fe0.05)75Si12.5B12.5 alloys.
• Development and testing of two prototype devices based on GSI sensors.

Main Results:

• The GSI effect was successfully analyzed in the studied Co-Fe-Si-B amorphous ribbons.
• The potential for developing highly sensitive magnetoelastic sensors based on the GSI effect was confirmed.
• Two practical devices were designed: one for characterizing cross-section dimension variations and another as a water flow meter.

Conclusions:

• Soft magnetic amorphous alloys exhibiting the GSI effect are promising for advanced sensor applications.
• The GSI effect provides a robust mechanism for non-contact measurement of mechanical stresses and dimensional changes.
• This research paves the way for novel magnetoelastic sensors in diverse engineering fields.