About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
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Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXVI
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| Presentation Title |
Design and development of the multi-functional Ni-Mn-Ga composites for energy conversion |
| Author(s) |
Wan-Ting Chiu, Fumiya Tanaka, Volodymyr Chernenko, Masaki Tahara, Hideki Hosoda |
| On-Site Speaker (Planned) |
Wan-Ting Chiu |
| Abstract Scope |
Ni-Mn-Ga ferromagnetic shape memory alloy (FSMA) particle-polymer composites exhibit large magnetic field-induced strain (MFIS) and fast response, making them promising for actuation and sensing applications. We investigate strategies to enhance MFIS through microstructural design and incorporation of soft magnetic materials. Composites containing Ni-Mn-Ga particles embedded in silicone matrices, as well as laminated-structures integrating Cu or Fe foils, were systematically studied. Magnetization and magnetostrain behaviors were evaluated using vibrating sample magnetometry and X-ray micro-CT imaging. The results reveal that Fe or FeNi incorporation significantly enhances magnetostrain sensitivity, reducing the threshold magnetic field and increasing strain response at low fields. This improvement is attributed to magnetically induced interactions, including additional tensile stresses and enhanced magnetic flux concentration. Furthermore, particle grid architecture and spatial alignment play a critical role in strain transfer from particles to the bulk composite. These findings provide an effective pathway for optimizing FSMA composites toward high-performance, low-field-driven functional devices. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Energy Conversion and Storage |