Structural study of Amorphous Fe70M10B20 (M=Zr, Nb and Cr) alloys by X-ray diffraction

Matsubara, Eiichiro; Sato, Sadao; Imafuku, Muneyuki; Nakamura, Takahiro; Koshiba, Hisato; Inoue, Akihisa; Waseda, Yoshio

doi:10.1016/s0921-5093(00)01903-1

Cited by 67 publications

(40 citation statements)

References 6 publications

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“…Among these systems, the amorphous Fe 70 M 10 B 20 (M is the transition metal) alloys are found to have a large supercooled liquid region. 6) As for Fe 70 Nb 10 B 20 , the temperature span of supercooled liquid region is about 54 K. In contrast, a supercooled liquid region cannot be detected on normal heating in the binary Fe 80 B 20 . 7) In this paper, we describe our recent investigation of the effect of Nb substitution to Fe on the local atomic arrangement of amorphous Fe 80 B 20 alloy studied by diffraction intensity analysis with the help of computer simulation.…”

Section: Introductionmentioning

confidence: 94%

Local Atomic Structures of Amorphous Fe80B20 and Fe70Nb10B20 Alloys Studied by Electron Diffraction

2005

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Effect of Nb addition on the stabilization of amorphous Fe 80 B 20 alloy was studied by electron diffraction structure analysis with the help of computer simulation. Atomic structure models with dense-random-packing 5000 atoms were constructed to reproduce interference functions obtained experimentally for the amorphous Fe 80 B 20 and Fe 70 Nb 10 B 20 alloys. In the structure models so obtained, prism-type local atomic arrangements dominated around B atoms in both the alloys, while deformed-bcc and icosahedral-like clusters were frequently found around Fe atoms. The icosahedral-like clusters and short Fe-Fe bondings were more frequently found in Fe 70 Nb 10 B 20 . The difference of glass forming abilities of these alloys is discussed in relation to the local structural differences.

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Section: Introductionmentioning

confidence: 94%

Local Atomic Structures of Amorphous Fe80B20 and Fe70Nb10B20 Alloys Studied by Electron Diffraction

2005

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“…Since such features would bring characteristic local structures, several studies of local structures for the metallic glasses have been reported by the X-ray diffraction and the anomalous X-rays scattering and methods. [7][8][9][10] For example, the local structures of Fe 70 (Zr, Nb) 10 B 20 metallic glasses have been explained with the packed connections of trigonal prisms centering B atom. 7,8) Matsubara et al have previously discussed the origin of a wide supercooled liquid region of La-Al-Ni and Zr-(Y)-Ni-Al metallic glasses with the structural data obtained by the anomalous X-ray scattering method.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] For example, the local structures of Fe 70 (Zr, Nb) 10 B 20 metallic glasses have been explained with the packed connections of trigonal prisms centering B atom. 7,8) Matsubara et al have previously discussed the origin of a wide supercooled liquid region of La-Al-Ni and Zr-(Y)-Ni-Al metallic glasses with the structural data obtained by the anomalous X-ray scattering method. 9,10) However, it has not been fully understood how each constituent element acts on its partial structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al on Local Structures of Zr–Ni and Zr–Cu Metallic Glasses

Sato¹,

Sanada²,

Saida

et al. 2005

Mater. Trans.

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In order to investigate the role of Al on the thermal stability of supercooled liquid state, the local structures of Zr 70 M 30 and Zr 70 M 20 Al 10 (M ¼ Ni, Cu) metallic glasses have been studied by the X-ray diffraction and EXAFS measurements. It is found that the different effect of Al substitution on the local structures around Cu and Ni elements is exhibited. No characteristic change is observed in the local structure in the ZrCu metallic glass by Al substitution, whereas a drastic change in the environment around Ni atom can be confirmed in the Zr-Ni metallic glass. That is, the coordination number of Zr around Ni decreases significantly by substitution of Al in the Zr-Ni metallic glass. This would be caused by the preferential correlation between Al and Zr. This result suggests that Al plays a dominant role on the formation of novel local structure with a decomposition of the tetragonal Zr 2 Ni-like local environment in the Zr-Ni binary alloy. We conclude that the novel local structure contributes to the stability of the supercooled liquid state in the Zr-Al-Ni metallic glass.

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“…The atomic structure of the Fe 70 Nb 10 B 20 amorphous alloy is a random network structure of the triangular prisms formed by 6 Fe(Nb) atoms at the vertices and 1 B at the center. 5) In order to clearly see the difference among them in local atomic structures at the nearest neighbor distances, the enlarged plot of the first peaks is also shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

“…[4][5][6] In the alloy containing more than 20 at% B, the basic structure of the amorphous phase is a random network structure formed by triangular prisms of 6 Fe(Nb) atoms and 1 B atom, 5) and the metastable Fe 23 B 6 phase is formed before decomposition to the equilibrium phases. 4) By reducing B content to 10 at%, it is known that the atomic structure in the amorphous state cannot be fully explained by the triangular prisms and the metastable phase whose structure is different from Fe 23 B 6 is precipitated.…”

Section: Introductionmentioning

confidence: 99%

Crystallization Behavior of αFe in Fe84Nb7B9 and Fe85Nb6B9 Amorphous Alloys

et al. 2004

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Structures of amorphous Fe 84 Nb 7 B 9 (FN7) and Fe 85 Nb 6 B 9 (FN6) alloys were investigated by high-energy X-ray diffraction. The structures of FN6 and FN7 contain a relatively large amount of bcc-Fe like clusters. This cluster size seems to grow larger for FN6 than for FN7. From the lattice parameters of Fe precipitates, the crystallization behavior of both alloys were discussed. The Fe precipitates contain supersaturated Nb and B. These solute atoms are removed from Fe by annealing at elevated temperature and stabilize the amorphous matrix. This appears to prevent the growth of Fe to maintain nano-scale Fe particles.

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Structural study of Amorphous Fe70M10B20 (M=Zr, Nb and Cr) alloys by X-ray diffraction

Cited by 67 publications

References 6 publications

Local Atomic Structures of Amorphous Fe<SUB>80</SUB>B<SUB>20</SUB> and Fe<SUB>70</SUB>Nb<SUB>10</SUB>B<SUB>20</SUB> Alloys Studied by Electron Diffraction

Local Atomic Structures of Amorphous Fe<SUB>80</SUB>B<SUB>20</SUB> and Fe<SUB>70</SUB>Nb<SUB>10</SUB>B<SUB>20</SUB> Alloys Studied by Electron Diffraction

Effect of Al on Local Structures of Zr–Ni and Zr–Cu Metallic Glasses

Crystallization Behavior of αFe in Fe<SUB>84</SUB>Nb<SUB>7</SUB>B<SUB>9</SUB> and Fe<SUB>85</SUB>Nb<SUB>6</SUB>B<SUB>9</SUB> Amorphous Alloys

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Structural study of Amorphous Fe70M10B20 (M=Zr, Nb and Cr) alloys by X-ray diffraction

Cited by 67 publications

References 6 publications

Local Atomic Structures of Amorphous Fe<SUB>80</SUB>B<SUB>20</SUB> and Fe<SUB>70</SUB>Nb<SUB>10</SUB>B<SUB>20</SUB> Alloys Studied by Electron Diffraction

Local Atomic Structures of Amorphous Fe<SUB>80</SUB>B<SUB>20</SUB> and Fe<SUB>70</SUB>Nb<SUB>10</SUB>B<SUB>20</SUB> Alloys Studied by Electron Diffraction

Effect of Al on Local Structures of Zr&ndash;Ni and Zr&ndash;Cu Metallic Glasses

Crystallization Behavior of &alpha;Fe in Fe<SUB>84</SUB>Nb<SUB>7</SUB>B<SUB>9</SUB> and Fe<SUB>85</SUB>Nb<SUB>6</SUB>B<SUB>9</SUB> Amorphous Alloys

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Effect of Al on Local Structures of Zr–Ni and Zr–Cu Metallic Glasses

Crystallization Behavior of αFe in Fe<SUB>84</SUB>Nb<SUB>7</SUB>B<SUB>9</SUB> and Fe<SUB>85</SUB>Nb<SUB>6</SUB>B<SUB>9</SUB> Amorphous Alloys