About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXV
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| Presentation Title |
Enhancement of the Magnetostrain via Manipulation of the Ni-Mn-Ga Martensite Phase Stability |
| Author(s) |
Wan-Ting Chiu, Pimpet Sratong-on, Masaki Tahara, Volodymyr Chernenko, Hideki Hosoda |
| On-Site Speaker (Planned) |
Wan-Ting Chiu |
| Abstract Scope |
Given the rapid advancements in robotics technology, this study introduces a novel composite material designed for high-speed and large-strain actuation and sensing applications. Single-crystalline Ni₄₉.₉Mn₂₈.₅Ga₂₁.₆ (SC Ni-Mn-Ga) ferromagnetic shape memory alloy (FSMA) micro-particles were produced through a controlled mechanical crushing process of polycrystalline Ni-Mn-Ga alloys. X-ray diffraction analysis indicated that the resulting SC Ni-Mn-Ga particles contained a combination of 5M and 7M martensitic phases. To develop the composite, 20 vol.% of these crystallographically and spatially aligned SC Ni-Mn-Ga particles were embedded in silicone rubber and cured under a magnetic field. Micro-computed tomography (micro-CT) confirmed the formation of a chain-like particle alignment within the composite matrix. Despite a relatively low particle content, the composite demonstrated a rubber-like deformation in response to a magnetic field and achieved a magnetostrain of up to 4.0%. This enhanced performance is attributed to the simultaneous presence of both 5M and 7M martensitic structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Phase Transformations |