Assistant Professor Wan-ting Chiu selected as an "ASUNARO Grant" recipient for FY2021
| Recipient | Assistant Professor Wan-ting Chiu |
|---|---|
| Affiliation | Hosoda-Tahara Lab |
| Award | ASUNARO Grant |
| Conferrer | Tokyo Tech |
| Research Topic | Enhancement of the deformation behavior of the defect–less NiMnGa particle/polymer composite by the grain separators |
| Date | July 6, 2021 |
The Fund is designed to provide financial support to researchers engaged in fundamental science and engineering research, including steady research in mature engineering fields, engineering research that explores new possibilities based on a long-term perspective without being influenced by trends, and original engineering research for which it is difficult to acquire funding.
For details, please see Tokyo Tech News.
<Research Outline>
Shape deformation and internal degree of freedom of the ferromagnetic shape memory alloy (FSMA) are manipulatable via magnetic field. Hence, FSMA is considered as a potential material for the high–speed actuators in robots and magnetic cooling applications. NiMnGa alloy is a promising FSMA; however, its high brittleness impedes the practicability. Therefore, in this study, the separators (i.e. S or Bi) were introduced into the polycrystalline NiMnGa alloy intentionally to separate the grains and make the alloy even brittle. The polycrystalline NiMnGa is thereafter mechanically crushed into single crystal powders at elevated temperature. The conventional difficulties such as high defect concentration and complicated procedures for single crystal preparation could be solved by the facile mechanical crushing. The NiMnGa single crystal powders are then utilized for the fabrications of the composites for realizing the high–speed actuators for robots and magnetic cooling applications.
