Fabrication of Fe-Si-B Based Amorphous Powder Cores by Spark Plasma Sintered and Their Magnetic Properties
Abstract
:1. Introduction
2. Experimental Materials and Methods
3. Results and Discussion
3.1. The Microstructure and the Phase Composition of Fe-Si-B/SiO2 Composite Powder
3.2. Microstructure of the Fe-Si-B/SiO2 Magnetic Particle Core
4. Conclusions
- (1)
- The core–shell composite powder of the Fe-Si-B coated nano SiO2 nanopowder was prepared by mechanical ball milling. The width of the supercooled liquid region of the composite powder is up to 40 °C, and the amorphous alloy has a strong amorphous forming ability.
- (2)
- The Fe-Si-B/SiO2 bulk amorphous nanocrystalline magnetic materials were prepared by spark plasma sintering. When the sintering pressure was 40 MPa, the sintering temperature range was 420–540 °C with a holding time of 1 min, and the prepared bulk Fe-Si-B particles (core) were well separated and insulated by the SiO2 (shell) intergranular layer in the core of the powder—and the density reached 98.93%. The block crystallizes at about 460 °C, and its crystalline phases are Fe3Si and Fe2B.
- (3)
- When the sintering and holding times are increased, there is an improvement in the density, maximum relative permeability, and magnetic loss of the Fe-Si-B/SiO2 sintered block. The magnetic permeability of the Fe-Si-B/SiO2 sintered block is stable in the high-frequency region. The magnetic properties are best when the sintering temperature is 420 °C for 2 min, with excellent soft magnetic properties.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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B800 (T) | Hc (A/m) | μe | Resistivity (µΩ·cm) | |
---|---|---|---|---|
Fe-Si-B ribbon | 1.56 | 7.9 | 6700 | 137.1 |
Fe-Si-B powder | 1.54 | 2111 | 590 | - |
Fe-Si-B/SiO2, 460 °C, 2 min | 1.15 | 934 | 45 | 691.44 |
Fe-Si-B/SiO2, 500 °C, 2 min | 1.23 | 809 | 48 | 449.42 |
Fe-Si-B/SiO2, 540 °C, 2 min | 1.54 | 3574 | 76 | 301.56 |
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Yan, L.; Yan, B.; Jian, Y. Fabrication of Fe-Si-B Based Amorphous Powder Cores by Spark Plasma Sintered and Their Magnetic Properties. Materials 2022, 15, 1603. https://doi.org/10.3390/ma15041603
Yan L, Yan B, Jian Y. Fabrication of Fe-Si-B Based Amorphous Powder Cores by Spark Plasma Sintered and Their Magnetic Properties. Materials. 2022; 15(4):1603. https://doi.org/10.3390/ma15041603
Chicago/Turabian StyleYan, Liang, Biao Yan, and Yin Jian. 2022. "Fabrication of Fe-Si-B Based Amorphous Powder Cores by Spark Plasma Sintered and Their Magnetic Properties" Materials 15, no. 4: 1603. https://doi.org/10.3390/ma15041603