| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
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| Symposium
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Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
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| Presentation Title |
Manipulation of Bi-doping of Polycrystalline Ni-Mn-Ga and Fabrication of Grain Particles for Smart Ni-Mn-Ga/polymer Composites |
| Author(s) |
Wan-Ting Chiu, Pimpet Sratong-On, Masaki Tahara, Volodymyr Chernenko, Hideki Hosoda |
| On-Site Speaker (Planned) |
Wan-Ting Chiu |
| Abstract Scope |
Actuators are critical components in future technologies, such as robots. Ferromagnetic shape memory alloys, especially the prototype NiMnGa alloys with a Heusler structure, which performs giant deformation strains via applying a magnetic field, are promising materials. In this work, we study how Bi-doping influences the microstructures of the NiMnGa polycrystals and the properties of single-crystalline NiMnGa grain particles obtained by a well-controlled mechanical crushing technique from the polycrystals. Phase constituents, surface morphologies, chemical composition, grain size distributions, thermal properties, and interfacial properties of the NiMnGa-xBi (x = 0.00-0.05 at.%) alloys have been investigated. Furthermore, 20 vol.% of the optimized NiMnGa-0.03Bi single-crystalline particles were homogeneously distributed in a silicone polymer. The composite, which was elastically compressed up to 50% whereby exhibiting a large and reversible deformation strain of the embedded individual single-crystal particles, was in-situ measured by an X-ray micro-CT. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Magnetic Materials, Polymers |