Optimizing FeSiCr-Based Soft Magnetic Composites Using the Deionized Water as the Phosphating Solvent
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Effects of Solvent on the Microstructure and Magnetic Properties of Phosphated Powder and SMCs
3.2. Process Optimization for SMCs Prepared in Deionized Water
3.3. Corrosion Resistance
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample | Density | µe (1 MHz) | Q (1 MHz) | Pcv/(mW·cm−3) @ 0.05 T | Withstanding Voltage (V) | |
---|---|---|---|---|---|---|
(g/cm3) | 100 kHz | 200 kHz | ||||
0.5 wt.% H3PO4-DI | 5.47 | 24.7 | 71.6 | 759.4 | 1533.0 | 241 |
0.5 wt.% H3PO4-Et | 5.40 | 23.4 | 69.5 | 771.0 | 1561.0 | 225 |
0.5 wt.% H3PO4-Ac | 5.34 | 22.1 | 69.1 | 811.9 | 1624.0 | 217 |
Sample | µe (1 MHz) | Q (1 MHz) | Pcv/(mW·cm−3) @ 0.05 T | Withstanding Voltage (V) | |
---|---|---|---|---|---|
100 kHz | 200 kHz | ||||
0.1 wt.% H3PO4-DI | 26.2 | 69.4 | 731.0 | 1476.0 | 259 |
0.2 wt.% H3PO4-DI | 26.1 | 74.7 | 703.5 | 1423.0 | 269 |
0.3 wt.% H3PO4-DI | 26.0 | 72.0 | 728.4 | 1461.0 | 250 |
0.4 wt.% H3PO4-DI | 25.4 | 72.5 | 744.7 | 1503.0 | 246 |
0.5 wt.% H3PO4-DI | 24.7 | 71.6 | 759.4 | 1533.0 | 241 |
35 °C @ H3PO4-DI | 25.7 | 80.2 | 709.5 | 1431.0 | 276 |
45 °C @ H3PO4-DI | 25.6 | 68.7 | 728.1 | 1463.0 | 281 |
55 °C @ H3PO4-DI | 25.1 | 67.2 | 733.6 | 1471.0 | 287 |
65 °C @ H3PO4-DI | 25.0 | 65.5 | 749.0 | 1515.0 | 291 |
References | Powder | Phosphating Solvent | Molding Pressure (MPa) | µe | Pcv/(mW·cm−3) a | |
---|---|---|---|---|---|---|
100 kHz | 200 kHz | |||||
[22] | CIP | Acetone | 580 | 14.0 | -- | -- |
[23] | FeSiCr | Ethanol | 600 | 20.6 | -- | 2087 |
[44] | FeSiCr | Ethanol | 265 | 16.3 | 1500 | 3550 |
[45] | FeSiCr | Acetone | 600 | 44.5 | 780 | -- |
This work | FeSiCr | Deionized water | 600 | 25.7 | 709.5 | 1431.0 |
Phosphated in different solvents (0.5 wt.% H3PO4 concentration; 25 °C) | Solvents | Raw | Acetone | Ethanol | Water | / |
Photograph after corrosion resistance test | / | |||||
Corrosion area ratio (%) | >96% | <1.0% | <0.5% | <0.3% | / | |
Phosphated with different H3PO4 concentrations (in deionized water; 25 °C) | H3PO4 concentrations | 0.1 wt.% | 0.2 wt.% | 0.3 wt.% | 0.4 wt.% | 0.5 wt.% |
Photograph after corrosion resistance test | ||||||
Corrosion area ratio (%) | <1.0% | <0.3% | <0.5% | <0.5% | <0.1% | |
Phosphated at different temperatures (in deionized water; 0.2 wt.% H3PO4 concentration) | Temperatures | 25 °C | 35 °C | 45 °C | 55 °C | 65 °C |
Photograph after corrosion resistance test | ||||||
Corrosion area ratio (%) | <0.3% | <0.1% | <1.0% | <5.0% | <10.0% |
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Li, X.; Yu, H.; Wang, H.; Yuan, T.; Liu, Z. Optimizing FeSiCr-Based Soft Magnetic Composites Using the Deionized Water as the Phosphating Solvent. Materials 2024, 17, 1631. https://doi.org/10.3390/ma17071631
Li X, Yu H, Wang H, Yuan T, Liu Z. Optimizing FeSiCr-Based Soft Magnetic Composites Using the Deionized Water as the Phosphating Solvent. Materials. 2024; 17(7):1631. https://doi.org/10.3390/ma17071631
Chicago/Turabian StyleLi, Xiangdong, Hongya Yu, Hongxiang Wang, Tongxin Yuan, and Zhongwu Liu. 2024. "Optimizing FeSiCr-Based Soft Magnetic Composites Using the Deionized Water as the Phosphating Solvent" Materials 17, no. 7: 1631. https://doi.org/10.3390/ma17071631