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

Matsubara, Eiichiro; Tanaka, Satoshi; Makino, Akihiro; Chiang, Te‐Hsuan

doi:10.2320/matertrans.45.1199

Cited by 5 publications

(1 citation statement)

References 10 publications

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“…Coordination numbers and atomic distances at the first peak of RDF were evaluated by fitting the experimental QiðQÞ through the least squares method. 12) Crystalline phases in the crystallized samples during the DSC measurements were investigated by the ordinary 2-X-ray diffraction with MoK radiation.…”

Section: Methodsmentioning

confidence: 99%

Local Structure and Glass Transition in Zr-Based Binary Amorphous Alloys

et al. 2005

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The physical significance of the glass transition observed by differential scanning calorimetry (DSC) in the metallic glasses was considered through the measurements of the heating-rate, , dependence of the glass transition temperature, T g , and the crystallization temperature, T x , in the Zr 70 Cu 30 and Zr 70 Ni 30 amorphous alloys and X-ray study of their structures in as-quenched and crystallized states. Zr 70 Cu 30 exhibits the glass transition before crystallization, but Zr 70 Ni 30 is immediately crystallized at heating rates of conventional time scale in the DSC measurement. The heating rate c at the intersection of the two linear curves of T g and T x against log provides us with a significant measure to determine the glass-forming ability or thermal stability of the metallic glasses. By heating at larger than c , the crystallization is suppressed and the glass transition is clearly observed even in Zr 70 Ni 30 . The thermal stability of the Zr 70 Cu 30 amorphous alloy is caused by retardation of crystallization due to the amorphous structure that is different from the Zr 2 Cu crystalline phase. In contrast, the thermal instability of Zr 70 Ni 30 is attributed to the structural similarity to the Zr 2 Ni crystalline phase. Thus, suppressing the crystallization is shown to be a key to enhance the thermal stability of the present amorphous alloys.

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Section: Methodsmentioning

confidence: 99%

Local Structure and Glass Transition in Zr-Based Binary Amorphous Alloys

et al. 2005

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Application of energy-filtering TEM to the nanocrystallization process in amorphous Fe84Nb7B9 alloy

Hirata

Hirotsu

2006

J Mater Sci

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In situ detection method for obtaining permeability of Fe-based amorphous alloys: ac resistance measurement for Fe84Nb7B9

Ichitsubo

Matsubara

Tanaka

et al. 2005

Applied Physics Letters

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In this letter, we propose an in situ detection method for obtaining permeability of soft magnetic Fe-based amorphous alloys. The temperature dependence of ac resistance was measured at different frequencies during heat treatment of Fe84Nb7B9 amorphous alloys. A significant increase in the ac (∼1000kHz) resistance appears at around 920 K during the heating process, which arises from the skin effect caused by a marked increase in sample permeability. This skin effect diminishes when the sample is heated to approximately 1100 K, which corresponds to the decrease in its permeability. Consequently, we note that the ac resistance measurement is useful for quick in situ assessment to achieve the soft magnetic property of an Fe-based amorphous alloy.

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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

Cited by 5 publications

References 10 publications

Local Structure and Glass Transition in Zr-Based Binary Amorphous Alloys

Local Structure and Glass Transition in Zr-Based Binary Amorphous Alloys

Application of energy-filtering TEM to the nanocrystallization process in amorphous Fe84Nb7B9 alloy

In situ detection method for obtaining permeability of Fe-based amorphous alloys: ac resistance measurement for Fe84Nb7B9

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