Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons
This study aims to enhance the amorphous formation ability and magnetic properties that are crucial for the production of high-quality nanocrystalline alloys. The structural, thermal, and magnetic characteristics of the alloy ribbons were analyzed through a systematic adjustment of Nb content, and,...
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2024-12-01
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| author | Hyunkyung Lee Hyunkyung Choi Young Rang Uhm Haein Choi-Yim |
| author_facet | Hyunkyung Lee Hyunkyung Choi Young Rang Uhm Haein Choi-Yim |
| author_sort | Hyunkyung Lee |
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| description | This study aims to enhance the amorphous formation ability and magnetic properties that are crucial for the production of high-quality nanocrystalline alloys. The structural, thermal, and magnetic characteristics of the alloy ribbons were analyzed through a systematic adjustment of Nb content, and, including Nb, significantly improved the amorphous formation ability and thermal stability of the alloy, which is vital for nanocrystalline production. By varying the Nb content within Fe<sub>85-<i>x</i></sub>Si<sub>2</sub>B<sub>8</sub>P<sub>4</sub>Cu<sub>1</sub>Nb<i><sub>x</sub></i> (<i>x</i> = 0.0, 0.5, 1.0, and 1.5), we explored finer adjustments to achieve homogeneous amorphousness during the melt spinning process. Careful control over the Nb content facilitated the production of amorphous ribbons with consistent homogeneity, which was critical for the subsequent fabrication of nanocrystalline structures through heat treatment. As a result, the amorphous ribbon of Fe<sub>85.5</sub>Si<sub>2</sub>B<sub>8</sub>P<sub>4</sub>Cu<sub>1</sub>Nb<sub>0.5</sub> showed a low coercivity of 7 A/m. The heat treatment showed a remarkably high saturation magnetic flux density of 1.94 T. Additionally, the grain size (D) decreased as the Nb content increased, with D values ranging from 25.09 nm to 24.29 nm, as calculated by the Scherrer formula. Mössbauer spectroscopy confirmed the formation of nanocrystalline and residual amorphous phases. The hyperfine magnetic field values (B<sub>eff</sub>) decreased from 25.7 T to 24.7 T in the amorphous samples and reached 33.0 T in the nanocrystalline phases. This study highlights Nb’s positive impact on thermal stability and amorphous formation capacity in Fe-Si-B-P-Cu alloys, culminating in the successful fabrication of nanocrystalline ribbons with superior structural and magnetic properties. |
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| language | English |
| publishDate | 2024-12-01 |
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| spelling | doaj-art-9f55b8f48d5c470483f2e1135f0c6bcd2025-08-20T02:00:39ZengMDPI AGMetals2075-47012024-12-011412138110.3390/met14121381Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb RibbonsHyunkyung Lee0Hyunkyung Choi1Young Rang Uhm2Haein Choi-Yim3Department of Applied Physics, Sookmyung Women’s University, Seoul 04310, Republic of KoreaHANARO Utilization Division, Korea Atomic Energy Research Institute (KAERI), Daejeon 34057, Republic of KoreaHANARO Utilization Division, Korea Atomic Energy Research Institute (KAERI), Daejeon 34057, Republic of KoreaDepartment of Applied Physics, Sookmyung Women’s University, Seoul 04310, Republic of KoreaThis study aims to enhance the amorphous formation ability and magnetic properties that are crucial for the production of high-quality nanocrystalline alloys. The structural, thermal, and magnetic characteristics of the alloy ribbons were analyzed through a systematic adjustment of Nb content, and, including Nb, significantly improved the amorphous formation ability and thermal stability of the alloy, which is vital for nanocrystalline production. By varying the Nb content within Fe<sub>85-<i>x</i></sub>Si<sub>2</sub>B<sub>8</sub>P<sub>4</sub>Cu<sub>1</sub>Nb<i><sub>x</sub></i> (<i>x</i> = 0.0, 0.5, 1.0, and 1.5), we explored finer adjustments to achieve homogeneous amorphousness during the melt spinning process. Careful control over the Nb content facilitated the production of amorphous ribbons with consistent homogeneity, which was critical for the subsequent fabrication of nanocrystalline structures through heat treatment. As a result, the amorphous ribbon of Fe<sub>85.5</sub>Si<sub>2</sub>B<sub>8</sub>P<sub>4</sub>Cu<sub>1</sub>Nb<sub>0.5</sub> showed a low coercivity of 7 A/m. The heat treatment showed a remarkably high saturation magnetic flux density of 1.94 T. Additionally, the grain size (D) decreased as the Nb content increased, with D values ranging from 25.09 nm to 24.29 nm, as calculated by the Scherrer formula. Mössbauer spectroscopy confirmed the formation of nanocrystalline and residual amorphous phases. The hyperfine magnetic field values (B<sub>eff</sub>) decreased from 25.7 T to 24.7 T in the amorphous samples and reached 33.0 T in the nanocrystalline phases. This study highlights Nb’s positive impact on thermal stability and amorphous formation capacity in Fe-Si-B-P-Cu alloys, culminating in the successful fabrication of nanocrystalline ribbons with superior structural and magnetic properties.https://www.mdpi.com/2075-4701/14/12/1381soft magnetic propertiesmelt spinningFe-based nanocrystalline soft magnetic alloysheat treatmentMössbauer spectroscopycrystallization |
| spellingShingle | Hyunkyung Lee Hyunkyung Choi Young Rang Uhm Haein Choi-Yim Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons Metals soft magnetic properties melt spinning Fe-based nanocrystalline soft magnetic alloys heat treatment Mössbauer spectroscopy crystallization |
| title | Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons |
| title_full | Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons |
| title_fullStr | Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons |
| title_full_unstemmed | Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons |
| title_short | Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons |
| title_sort | structural magnetic and mossbauer study on nb and heat treatment of fe si b p cu nb ribbons |
| topic | soft magnetic properties melt spinning Fe-based nanocrystalline soft magnetic alloys heat treatment Mössbauer spectroscopy crystallization |
| url | https://www.mdpi.com/2075-4701/14/12/1381 |
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