| 配分額 *注記 |
4,680千円 (直接経費: 3,600千円、間接経費: 1,080千円)
2024年度: 2,210千円 (直接経費: 1,700千円、間接経費: 510千円)
2023年度: 2,470千円 (直接経費: 1,900千円、間接経費: 570千円)
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| 研究実績の概要 |
1. Different composite powders were prepared by FD-POEM using nanoparticles as raw materials. The morphology and porosity of the FD-POEM powders were controlled by adjusting the parameters of the FD-POEM, such as solvent type, slurry concentration, vibration mode, and pressure. The working principle of the FD-POEM was investigated in the field using a high-magnification optical microscope and cooling and heating devices to clarify the relationship between these parameters and the pore formation mechanism in the powder. In addition, the effects of powder properties of the composite powder were also analyzed. Finally, a uniform spherical FD-POEM composite powder with good flowability was successfully obtained, and the laser absorption of the composite powder was improved due to the presence of numerous pores.
2. Determine optimal L-PBF parameters. Using finite element method (FEM), three-dimensional thermo-fluid analysis (FLOW-3D), and monorail tests, calculate the temperature gradient and crystallization rate of the molten pool to determine the effect of L-PBF parameters on the melting and solidification behavior of the powder and to identify factors affecting molding quality (density, cracks, etc.). Finally, a high-density thermoelectric film with a thickness of approximately 0.005mm was obtained.
3. By adopting the optimal L-PBF parameters, powders with different content were prepared using the FD-POEM method, solidified with L-PBF, and the solid solution limit was examined.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The experiment went generally well.
The preparation of FD-POEM powder regarding thermoelectric materials during the implementation of the project was relatively smooth.
As for the L-PBF process, it was also able to be implemented relatively smoothly. However, thermoelectric materials are different from normal metallic materials such as Ti, Fe, Al, etc., and there were many cracks in the printed body, which required more time to adjust the process.
The next issue is the performance testing of the films. We are still looking for instruments or companies that can test the thermoelectric films for commissioning.
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| 今後の研究の推進方策 |
In addition to following the project plan, the first step is to find an instrument or company that can test the thermoelectric properties of thin films. Secondly, we also intend to perform a rapid heat treatment of FD-POEM powder using the PS method so that the elements are firmly dissolved in the powder, which is expected to reduce cracks during the L-PBF process. And we hope to further improve the thermoelectric properties of L-PBF builds.
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