New (FeCoCrNi)-(B,Si) high-entropy metallic glasses, study of the crystallization processes by X-ray diffraction and Mössbauer spectroscopy.

Panahi, S. Leila; Garcia-Ramón, Maria; Pineda, Eloi; Bruna, Pere

doi:10.1016/j.jnoncrysol.2020.120301

Cited by 14 publications

(5 citation statements)

References 18 publications

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“…We can compute the entropies of these alloys and distinguish between the configurational entropy and the mismatch entropy [23]; the configurational entropy is simply proportional to the ln(N), where N is the number of components, thus we have an increase in this entropy from the A alloy (N = 4) to the AB10Si10 alloy (N = 6). The mismatch entropy has been shown to be proportional to the delta parameter that is a measure of the atomic size difference between the constituent atoms, and this value increase from 0.3% for the A alloy to 14.70% for the AB20 and 10.72% for AB10Si10 [15]. Therefore, from these values and the electrochemical parameters, it would seem that the mismatch entropy may be a factor affecting the corrosion resistance, but this analysis does not consider the fact that AB20 and AB10Si10 are amorphous samples with a disordered structure.…”

Section: Electrochemical Measurements In Nacl Solutionmentioning

confidence: 99%

“…In the case of HEMGs, Gong et al [13] have shown that the improvement in the corrosion resistance can be ascribed to two effects: on the one hand to the reduction in atomic mobility due to the high-entropy effect and, on the other hand, to the cocktail effect where the mixture of several corrosion resistant elements can affect the overall behavior. Following this strategy, we modified the composition of one particular HEA [14,15], the equimolar FeCoCrNi, which consists of a stable face-centered cubic (FCC) solid solution with good plasticity and toughness but with low hardness and poor wear resistance. In order to improve the mechanical and electrochemical resistance of this alloy, B and Si were added to this base composition.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Si and B on the Electrochemical Behavior of FeCoNiCr-Based High-Entropy Amorphous Alloys

Panahi¹,

Bruna²,

Pineda³

2022

Materials

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The ability to produce high-entropy alloys with an amorphous structure, so-called high-entropy metallic glasses (HEMGs), offers the possibility to produce new compositions with good mechanical properties and resistance to corrosion. In this study, corrosion behavior was studied in two HEMGs, FeCoNiCrB and FeCoNiCr(BSi). In both cases, the total amount of metalloid atoms was kept constant at 20 at.%. The electrochemical behavior of these alloys was studied by means of linear polarization resistance (LPR) measurements and electrochemical impedance spectroscopy in a 3 wt.% NaCl solution. The effect of corrosion was characterized by using X-ray photoelectron spectroscopy (XPS) and the surface morphology was checked using a scanning electron microscope (SEM). The results show that samples with B but without Si exhibit better corrosion resistance due to its chemical homogeneity and lack of structural heterogeneity.

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Section: Electrochemical Measurements In Nacl Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Si and B on the Electrochemical Behavior of FeCoNiCr-Based High-Entropy Amorphous Alloys

Panahi¹,

Bruna²,

Pineda³

2022

Materials

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“…Kim [44]. Panahi et al studied the glass forming range of (FeCoCrNi)-(B,Si) HEAAs, the crystallization process, and the influence of Si element on the microstructure was elucidated [45]. Szyba et al studied structural and electrochemical properties of resorbable Ca 32 Mg 12 Zn 38 Yb 18-x B x (x = 1, 2, 3) metallic glasses in Ringer's solution; it was found that the HEAA had significantly higher corrosion resistance than CaMgZn alloys [46].…”

Section: Introductionmentioning

confidence: 99%

Composition Design Strategy for High Entropy Amorphous Alloys

Ding,

Zhang,

Yao

2024

Materials

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High entropy amorphous alloys (HEAAs) are materials that have received much attention in recent years. They exhibit many unique properties; however, research on their composition design method has not been deep enough. In this paper, we summarized some effective composition design strategies for HEAAs. By adjusting the atomic ratio from quinary bulk metallic glasses, Ti20Zr20Cu20Ni20Be20 HEAA with a high fracture strength of 2315 MPa was designed. By similar element addition/substitution, a series of Ti–(Zr, Hf, Nb)–Cu–Ni–Be HEAAs was developed. They possess good glass-forming ability with a maximum critical diameter of 30 mm. Combining elements from those ternary/quaternary bulk metallic glasses has also proved to be an effective method for designing new HEAAs. The effect of high entropy on the property of the alloy, possible composition design methods, and potential applications were also discussed. This paper may provide helpful inspiration for future development of HEAAs.

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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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New (FeCoCrNi)-(B,Si) high-entropy metallic glasses, study of the crystallization processes by X-ray diffraction and Mössbauer spectroscopy.

Cited by 14 publications

References 18 publications

Effect of Si and B on the Electrochemical Behavior of FeCoNiCr-Based High-Entropy Amorphous Alloys

Effect of Si and B on the Electrochemical Behavior of FeCoNiCr-Based High-Entropy Amorphous Alloys

Composition Design Strategy for High Entropy Amorphous Alloys

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

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