Direct and inverse magnetostrictive properties of Fe–Co–V alloy particle-dispersed polyurethane matrix soft composite sheets

• Published in: Sensors and actuators. A. Physical. Vol. 337; p. 113427
• Main Authors: Kurita, Hiroki, Keino, Takumi, Senzaki, Takahiro, Narita, Fumio
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 16.04.2022; Elsevier BV
• Subjects: Composite materials; Devices; Energy harvesting; Ferrous alloys; Flexible composites; Flux density; Internet of Things; Magnetic fields; Magnetic flux; Magnetic properties; Magnetostriction; Magnetostrictive properties; Matrix; Polyurethane; Polyurethane resins; Repeated loading; Sensing; Sheets; X-ray computed tomography; Sensing; X-ray computed tomography; Flexible composites; Magnetostrictive properties
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/j.sna.2022.113427

Wearable and flexible magnetostrictive materials are required for the realization of devices related to the Internet of Things. Soft magnetostrictive materials are also expected to be used as tactile devices in telemedicine applications. This study reports on the successful fabrication of a material made up of Fe49Co49V2 alloy particles dispersed in a polyurethane (PU) matrix (PU–FeCoV); this material was used to make soft magnetic composite sheets with a positive magnetostriction effect. It was found that several PU–FeCoV soft composite sheets also showed a negative magnetostriction on one side of the composite sheets. This study revealed that the large pores induce this bending phenomenon in the PU–FeCoV soft composite sheet. The magnetic flux density of the PU–FeCoV soft composite sheets was found to vary with repeated loading. Hence, we believe that PU–FeCoV soft composite sheets may have potential applications as flexible sensing and vibration energy harvesting devices as well as in haptics devices. [Display omitted] •Fe49Co49V2 alloy particles dispersed in a polyurethane (PU) matrix (PU–FeCoV) was successfully fabricated.•PU–FeCoV soft composite sheets showed a magnetostriction effect equal to or higher than that of the Fe49Co49V2 alloy plate.•PU–FeCoV soft composite sheets with a small quantity of Fe49Co49V2 alloy particles could be used in sensor applications.