Fe-Based Ferromagnetic Glassy Alloys with Wide Supercooled Liquid Region

Inoue, Akihisa; Gook, Jin Seon

doi:10.2320/matertrans1989.36.1180

Cited by 415 publications

(245 citation statements)

References 16 publications

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“…The high glass-forming ability enables us to prepare bulk glassy alloys by copper mold casting or quenching the melt in a quartz tube into stirred water. As a result, a number of bulk glassy alloys have been successfully prepared in multicomponent systems such as Mg-, 2) Zr-, 3) Ti-, 4) Fe-, 5) Pd-, 6) Ni-, 7) Co- 8) and based alloys. Summarizing the features of the above-mentioned multicomponent systems, the following three empirical rules have been proposed, 10) i.e., (1) multi-component systems consisting of more than three kinds of elements, (2) significant difference in atomic size ratios above 12% among the main constituent elements, and (3) suitable negative heats of mixing among their main elements.…”

Section: Introductionmentioning

confidence: 99%

Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Wang²,

Zhang

et al. 2002

Mater. Trans.

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194

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mold casting. The T x and T g of the glassy rod were 711 K and 658 K and T g /T m was 0.57. The bulk glassy alloy can be characterized by equal concentration of constituent elements without distinct host component. It is confirmed that more multicomponent glassy systems have a better glass-forming ability as compared with simpler alloy systems. The glassy alloy rod also exhibits good mechanical properties which are similar to those for ordinary glassy alloys. The finding of this alloy system may provide a new synthesis method of bulk glassy alloys.

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Section: Introductionmentioning

confidence: 99%

Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Wang²,

Zhang

et al. 2002

Mater. Trans.

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194

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“…Recently, some kinds of soft magnetic glassy alloys with large ÁT x combined with good soft magnetic properties have been synthesized in Fe-(Al, Ga)-(P, C, B, Si, Ge) [10][11][12][13][14][15][16][17][18][19][20][21] and Fe-(Co, Ni)-(Zr, Nb, Ta, Mo, W)-B systems. [22][23][24] The Fe-(Al, Ga)-(P, C, B, Si, Ge) glassy alloys have wide ÁT x of about 50 K and their maximum thickness to form a single glassy phase is about 220 mm prepared by the single-roller meltspinning method.…”

Section: Introductionmentioning

confidence: 99%

Origin of Low Coercivity of Fe-(Al, Ga)-(P, C, B, Si, Ge) Bulk Glassy Alloys

2003

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The magnetic properties of the glassy Fe-(Al, Ga)-(P, C, B, Si, Ge) alloys have been compared with those of the conventional Fe-based amorphous alloys to clarify the feature of the glassy alloys as a soft magnetic material. The glassy Fe-(Al, Ga)-(P, C, B, Si, Ge) alloys exhibit lower saturation magnetization (J s ) than that of the conventional Fe-(B, Si, C) amorphous alloys with the same Fe content. The glassy alloys also have larger saturation magnetostriction constant ( s ) than that of the conventional Fe-based amorphous alloys with the same J s . However, the glassy alloys tend to show relatively low coercivity (H c ) whereas s is large. The theoretical analysis on the basis of domain-wall movement suggests that the low H c originates from the much higher packing density of the glassy alloys than that of the conventional amorphous alloys, which realizes the low density of the quasi-dislocation dipole-type elastic stress sources or the low pinning force due to the elastic stress. The good combination of high glass-forming ability and good soft magnetic properties (especially low H c ) indicates the possibility of future development as new low loss material.

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“…Since the success of forming bulk glassy alloys with a large supercooled liquid region before crystallization and good mechanical properties in Ln 1) and Mg 2) based systems by a copper mold casting method in late 1980's, a number of bulk glassy alloys have been prepared in multicomponent systems such as Zr-, 3,4) Ti-, 5) Fe-, 6) Pd-Cu-, 7) Ni- 8) and Co- 9) alloys. Among these bulk glassy alloys, high tensile fracture strength comparable to compressive fracture strength has been obtained only in Ln-, Mg-, Zr-and Pd-Cu-based bulk glassy alloys with good ductility.…”

Section: Introductionmentioning

confidence: 99%

Effects of Additional Elements on the Glass Formation and Corrosion Behavior of Bulk Glassy Cu-Hf-Ti Alloys

et al. 2003

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New bulk glassy (Cu 0:6 Hf 0:25 Ti 0:15 ) 98 M 2 (M = Mo, Ta and Nb) alloys with high thermal stability were synthesized and the effects of additional elements Mo, Ta and Nb on the glass formation and corrosion behavior were examined. The maximum diameter for glass formation of the 2 at%Mo, 2 at%Ta and 2 at%Nb alloys was 1.5 mm, 3.5 mm and 4.0 mm, respectively. The corrosion behavior of the Cu-Hf-Ti-(Mo, Ta and Nb) glassy alloys was examined by weight loss and electrochemical measurements. By substitution of 2 at%Mo, Ta or Nb for the Cu 60 Hf 25 Ti 15 alloy, the corrosion rates of the alloys decreased to 1=2 in 1 N HCl and two orders of magnitude in 3% NaCl solution. It was also found that substitution of elements Mo, Ta and Nb for the Cu 60 Hf 25 Ti 15 glassy alloy was effective on decreasing anodic passive current density in 3% NaCl solution.

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Fe-Based Ferromagnetic Glassy Alloys with Wide Supercooled Liquid Region

Cited by 415 publications

References 16 publications

Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Origin of Low Coercivity of Fe-(Al, Ga)-(P, C, B, Si, Ge) Bulk Glassy Alloys

Effects of Additional Elements on the Glass Formation and Corrosion Behavior of Bulk Glassy Cu-Hf-Ti Alloys

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