Nanocrystallization and soft magnetic properties of Fe23M6 (M: C or B) phase in Fe-based bulk metallic glass

Jung, Hyo Yun; Yi, So Young

doi:10.1016/j.intermet.2014.01.005

Cited by 15 publications

(7 citation statements)

References 28 publications

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“…The smaller number of atoms in the unit cell for Fe 2 P than Fe 3 P suggests that the Fe 2 P is relatively easy to crystallize from a melt. The coordination surroundings around P atom as shown in illustrations in Table 3 exhibit that neither Fe 3 P nor Fe 2 P phase contains icosahedral clusters with (CN) = 12 denoted by 12 5.0 , which is widely-accepted as an essential cluster for enhancing GFA in some of metastable phases, such as Fe 23 B 6 phase in case of including Nb 16) from ETM and C 17) to Fe-Si-B-P-Cu. Another metastable phase to enhance GFA of the Fe-based BMGs could be Fe 3 B, 18) which plays a role to form network structure by sharing edges or vertices of the trigonal prism.…”

Section: Resultsmentioning

confidence: 99%

The Effects of Fe2P and Fe3P Intermediate Equilibrium Phases on Glass-Forming Ability of Fe76Si9B10P5 Bulk Metallic Glass

Takeuchi

Makino

2014

Mater. Trans.

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The glass-forming ability (GFA) of an Fe 76 Si 9 B 10 P 5 bulk metallic glass (BMG) was evaluated thermodynamically with commercial software, Thermo-Calc, with Fe-base database, TCFE7 by utilizing its best ability to deal with equilibrium phases. The Fe 76 Si 9 B 10 P 5 BMG was selected because it is the simplest Fe-rich BMG belonging to Fe-metalloid type with the greatest sample dimensions. A possible reason for the presence of intermediate equilibrium phases to degrade GFA of the Fe 76 Si 9 B 10 P 5 was discussed. The results revealed that the Fe 76 Si 9 B 10 P 5 BMG is characterized by near eutectic composition in the Fe-rich Fe-Si-B-P quaternary system and by the simultaneous presence of Fe 3 P and absence of Fe 2 B phases in equilibrium at a range below the solidus-to the glass-transition temperatures. The analysis of Fe 76 (Si,B,P) 24 alloys for equilibrium phases revealed that the Fe 2 P phase can degrade GFA of the Fe

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Section: Resultsmentioning

confidence: 99%

The Effects of Fe2P and Fe3P Intermediate Equilibrium Phases on Glass-Forming Ability of Fe76Si9B10P5 Bulk Metallic Glass

Takeuchi

Makino

2014

Mater. Trans.

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“…The main reason for omitting Fe 3 B and Fe 23 B 6 phases is the lacks of these phases in the TCFE7 database in case of applying TCFE7 database to the Fe-B-P-Cu system. Another reason for omitting the Fe 23 B 6 phase is due to the experimental data that the Fe 23 B 6 phase can be a metastable phase in the Fe-based amorphous alloys with Nb 12) from ETM and C 13) to the Fe-Si-B-P-Cu system. At any event, the present study mainly deals with primary crystallization of ¡-Fe to precipitate from an amorphous phase, and thus, these metastable phases were out of the considerations.…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic Assessment of Fe-B-P-Cu Nanocrystalline Soft Magnetic Alloys for Their Crystallizations from Amorphous Phase

Takeuchi

Makino

2014

Mater. Trans.

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The crystallization processes of Fe 83.3+x B 7¹x P 9 Cu 0.7 (x = 0 to 2.5 at%) amorphous alloys were thermodynamically assessed using ThermoCalc software with TCFE7 database for Fe-based alloys. The analysis of the alloys for a primary crystallization precipitating bcc-Fe revealed metastability among four phases comprising bcc-Fe, two kinds of Fe-based amorphous phases that are rich in Fe-B and Fe-P and crystalline Curich phase. The roles of P and Cu additions to the Fe-based amorphous alloys are thermodynamically interpreted as stabilizing the remaining amorphous phase at the primary crystallization. The dual Fe-rich amorphous phases due to the inclusion of P characterize a heterogeneous amorphous structure of NANOMET family alloys comprising Fe and metalloids mainly and without early-transition metals.

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“…Therefore, the technique has to be adapted for each chemical composition. The nanocrystallization of an alloy could also be achieved using an appropriate thermal treatment of the amorphous alloy [25,26]. Depending on the time duration and temperature of the annealing process, the structure of an amorphous alloy will either become relaxed, or it will change into a two-phase structure consisting of an amorphous matrix with crystalline grains.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Effect of Thermal Treatment on the Obtaining of Magnetic Phases: Fe5Y, Fe23B6, Y2Fe14B and αFe within the Amorphous Matrix of Rapidly-Quenched Fe61+xCo10−xW1Y8B20 Alloys (Where x = 0, 1 or 2)

et al. 2020

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The paper presents the results of research on the structure and magnetic properties of Fe61+xCo10−xW1Y8B20 alloys (where x = 0, 1 or 2). The alloys were produced using two production methods with similar cooling rates: Injection casting and suction casting. The alloy samples produced were subjected to isothermal annealing at 940 K for 10 min. The structure of the materials was examined using X-ray diffraction. Isothermal annealing has led to the formation of various crystallization products depending on the chemical composition of the alloy and the structure of the alloy in a solidified state. In two cases, the product of crystallization was the hard magnetic phase Y2Fe14B. However, the mechanism of this phase formation was different in both cases. The magnetic properties of alloys were tested using a vibrating sample magnetometer and a Faraday magnetic balance. It is found that the grain crystallite size of the crystalline phases have a decisive influence on the value of the coercive field (especially in the case of hard magnetic phases). It has been shown that privileged areas can already be created during the production process. Their presence determines the crystallization process.

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Nanocrystallization and soft magnetic properties of Fe23M6 (M: C or B) phase in Fe-based bulk metallic glass

Cited by 15 publications

References 28 publications

The Effects of Fe<sub>2</sub>P and Fe<sub>3</sub>P Intermediate Equilibrium Phases on Glass-Forming Ability of Fe<sub>76</sub>Si<sub>9</sub>B<sub>10</sub>P<sub>5</sub> Bulk Metallic Glass

The Effects of Fe<sub>2</sub>P and Fe<sub>3</sub>P Intermediate Equilibrium Phases on Glass-Forming Ability of Fe<sub>76</sub>Si<sub>9</sub>B<sub>10</sub>P<sub>5</sub> Bulk Metallic Glass

Thermodynamic Assessment of Fe-B-P-Cu Nanocrystalline Soft Magnetic Alloys for Their Crystallizations from Amorphous Phase

Investigation into the Effect of Thermal Treatment on the Obtaining of Magnetic Phases: Fe5Y, Fe23B6, Y2Fe14B and αFe within the Amorphous Matrix of Rapidly-Quenched Fe61+xCo10−xW1Y8B20 Alloys (Where x = 0, 1 or 2)

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