Nanoscale structural heterogeneity and magnetic properties of Fe-based amorphous alloys via Co and Ni additions

Yang, Z.Z.; Zhu, Liya; Jiang, Shaofei; Zhu, Chuanxi; Xu, Qi; Lin, YuanYao; Chen, F.G.; Wang, Y.G.

doi:10.1016/j.jallcom.2022.164067

Cited by 16 publications

(2 citation statements)

References 43 publications

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“…A maximum indentation depth of around 200 nm was used that study, suggesting that the tested area size was larger than 1 μm for each inden Therefore, the results implied heterogeneity in the Fe50Ni30P13C7 sample at the micro scale. On the other hand, amplitude-modulation dynamic AFM studies on Fe80Si9B11 an Fe80-xMxSi9B11 (M = Co and Ni, x = 0, 2, 4) MGs suggested liquid-like regions with an ave age size of ~10 nm [50,51]. Our results in this work revealed heterogeneity with a chara teristic domain size of ~200-300 nm by pushing the spatial resolution of regul nanoindentation tests down to 200 nm, providing the missing information about heter geneity at the intermediate length scale and implying that the distribution of those "li uid-like regions" was also not uniform at the hundreds of nanometers scale in the F based MG.…”

Section: Minimum Spacing For Nanoindentation Mappingmentioning

confidence: 99%

Spatial Resolution Limit for Nanoindentation Mapping on Metallic Glasses

et al. 2022

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Spatial heterogeneity, as a crucial structural feature, has been intensively studied in metallic glasses (MGs) using various techniques, including two-dimensional nanoindentation mapping. However, the limiting spatial resolution of nanoindentation mapping on MGs remains unexplored. In this study, a comprehensive study on four representative MGs using nanoindentation mapping with a Berkovich indenter was carried out by considering the influence of a normalized indentation spacing d/h (indentation spacing/maximum indentation depth). It appeared to have no significant correlation with the measured hardness and elastic modulus when d/h > 10. The hardness and elastic modulus started to increase slightly (up to ~5%) when d/h < 10 and further started to decrease obviously when d/h < 5. The mechanism behind these phenomena was discussed based on a morphology analysis of residual indents using scanning electron microscopy and atomic force microscopy. It was found that the highest spatial resolution of ~200 nm could be achieved with d/h = 10 using a typical Berkovich indenter for nanoindentation mapping on MGs, which was roughly ten times the curvature radius of the Berkovich indenter tip (not an ideal triangular pyramid) used in this study. These results help to promote the heterogeneity studies of MGs using nanoindentation that are capable of covering a wide range of length scales with reliable and consistent results.

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Section: Minimum Spacing For Nanoindentation Mappingmentioning

confidence: 99%

Spatial Resolution Limit for Nanoindentation Mapping on Metallic Glasses

et al. 2022

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“…MGs continue to attract the interest of researchers especially for their excellent soft magnetic properties [5][6][7][8][9][10]. To enhance their practical applications, both the microstructure and soft magnetic properties of novel MGs are examined, too.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cobalt on the Microstructure of Fe-B-Sn Amorphous Metallic Alloys

Grey,

Cesnek,

Bujdoš

et al. 2024

Metals

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Fe78B15Sn7 and (Fe3Co1)78B15Sn7 amorphous metallic alloys were prepared using the method of planar flow casting. The amorphous nature of ribbons containing 7 at. % Sn was verified by X-ray diffraction. The resulting chemical composition was checked by flame atomic absorption spectroscopy and by mass spectrometry with inductively coupled plasma. The microstructure of the as-quenched metallic glasses was investigated by 57-Fe and 119-Sn Mössbauer spectrometry. The experiments were performed with transmission geometry at 300 K, 100 K, and 4.2 K, and in an external magnetic field of 6 T. The replacement of a quarter of the Fe by Co did not cause significant modifications of the hyperfine interactions in the 57-Fe nuclei. The observed minor variations in the local magnetic microstructure were attributed to alterations in the topological short-range order. However, the in-field 57-Fe Mössbauer spectra indicated a misalignment of the partial magnetic moments. On the other hand, the presence of Co considerably affected the local magnetic microstructure of the 119-Sn nuclei. This was probably due to the higher magnetic moment of Co, which induces transfer fields and polarization effects on the diamagnetic Sn atoms.

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