Effect of Si on the glass-forming ability, thermal stability and magnetic properties of Fe–Co–Zr–Mo–W–B alloys

Wang, W.-M.; Gebert, A.; Roth, S.; Kuehn, U.; Schultz, L.

doi:10.1016/j.jallcom.2007.05.009

Cited by 17 publications

(8 citation statements)

References 26 publications

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“…The latter is also dependent on the coordination number and can be obtained from the mass density. [23] Thus, we can explain the conflict by the two-structure model proposed in our earlier article: [15] iron atoms exist in the amorphous state with face-centered-cubic/random-close-packed (fcc/rcp) and body-centered-cubic (bcc) structural units simultaneously, bearing the coordination numbers of 12/12 and 8, respectively. Here, we counted the rcp structure into the fcc type, which is metastable and occupies the high fraction in the glass, because they have similar structure parameters.…”

Section: Discussionmentioning

confidence: 94%

Microstructure and Magnetic Properties in Fe61Co9−x Zr8Mo5W x B17 (0 ≤ x ≤ 3) Glasses and Glass-Matrix Composites

Wang

Zhang

Gebert

et al. 2009

Metall Mater Trans A

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By systematically investigating the Fe 61 Co 9Àx Zr 8 Mo 5 W x B 17 (0 £ x £ 3) melt-spun ribbons and copper-mold cast cylinders with 2-mm diameter, we attempt to discover the effect of tungsten on the microstructure and magnetic properties of the Fe-based glass formers. It was found that all as-spun ribbons are fully amorphous and their characteristic distance d a has an increasing tendency with tungsten content (c W ). The precipitates in the as-cast cylinders change from the ferromagnetic phases (Fe 23 Zr 6 + Fe 2 Zr + Fe 2 B + Fe 8 B) plus a-Fe to the nonmagnetic phases (ZrB 12 + W 2 B 5 ) plus a-Fe with increasing c W . The averaged characteristic distance d c of the precipitates formed in the casting and annealing processes increases with c W , consistent with the d a of the ribbons. The temperature and heat of the first crystallization for the as-prepared ribbons and cylinders (T p1 and DH 1 ) also increase with c W . The magnetization and Curie temperature of the as-prepared ribbons and cylinders decrease with c W , while the coercivity of the as-prepared samples is obviously dependent on the volume fraction of the precipitates formed in the casting process (CP). These results indicate that tungsten can tune the fractions of the face-centered-cubic/random-close-packed (fcc/rcp) and body-centered-cubic (bcc) Fe-rich structural units in the undercooled melts of the Fe-based glasses.

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Section: Discussionmentioning

confidence: 94%

Microstructure and Magnetic Properties in Fe61Co9−x Zr8Mo5W x B17 (0 ≤ x ≤ 3) Glasses and Glass-Matrix Composites

Wang

Zhang

Gebert

et al. 2009

Metall Mater Trans A

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“…Earlier works show that, near the known composition Fe 60 Co 10-Zr 8 Mo 5 W 2 B 15 [10], a larger boron content seems helpful for the glass forming ability (GFA) of the Fe-based alloys, like 15.5 at.% boron in Fe-Co-Zr-Mo-W-B alloy [11] and 20 at.% B in Fe-Co-Zr-W-B [12]; our work shows that a slight decline of boron content can deteriorate the GFA drastically [13]. Oxygen is similar to boron in several aspects like having a large electric negative value, locating in the same period in the Periodic Table of the Elements (PTE) and bearing a small covalent radius.…”

Section: Introductionmentioning

confidence: 70%

Casting vacuum effects on the precipitates and magnetic properties of Fe-based glassy alloys

Wang

Zhang

Gebert

et al. 2011

Journal of Non-Crystalline Solids

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“…Therefore, after after long range diffusion processes material consists of two phases with different chemical compositions. The difference in temperature at the beginning of crystallization (T x ) and the glass transition temperature (T g ) is called a supercooled liquid range [13][14][15][16][17] and is an indirect measure of the glass forming ability. Fig.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Thermal and Magnetic Properties of Amorphous Fe61Co10Zr2.5Hf2.5Me2W2B20 (Where Me = Mo, Nb, Ni Or Y) Ribbons

Gruszka

Nabiałek

Szota

et al. 2016

Archives of Metallurgy and Materials

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The paper presents the results of structural and magnetic properties and thermal stability for a group of functional materials based on Fe61Co10Zr2.5Hf2.5Me2W2B20 (where Me = Mo, Nb, Ni or Y). Samples were obtained in the form of ribbons using melt-spinning method. The X-ray diffraction patterns of investigated samples confirmed their amorphous structure. Based on the analysis of DSC curves characteristic temperatures: glass forming temperature (Tg), crystallization temperature (Tx) and temperature range of the supercooled liquid ΔTx were determined. Small addition of transition metals elements has strong influence on magnetic and thermal parameters of studied materials. The comprehensive studies revealed that in terms of magnetic properties the Ni-addition resulted in highest reduction in coercivity and anisotropy field.

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Effect of Si on the glass-forming ability, thermal stability and magnetic properties of Fe–Co–Zr–Mo–W–B alloys

Cited by 17 publications

References 26 publications

Microstructure and Magnetic Properties in Fe61Co9−x Zr8Mo5W x B17 (0 ≤ x ≤ 3) Glasses and Glass-Matrix Composites

Microstructure and Magnetic Properties in Fe61Co9−x Zr8Mo5W x B17 (0 ≤ x ≤ 3) Glasses and Glass-Matrix Composites

Casting vacuum effects on the precipitates and magnetic properties of Fe-based glassy alloys

Analysis of the Thermal and Magnetic Properties of Amorphous Fe61Co10Zr2.5Hf2.5Me2W2B20 (Where Me = Mo, Nb, Ni Or Y) Ribbons

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