Microstructure and magnetic properties of Fe-Co-Nd-Y-B alloys obtained by suction casting method

Olszewski, J.; Zbroszczyk, J.; Hasiak, M.; Kaleta, Jerzy; Nabiałek, M.; Brągiel, P.; Sobczyk, K.; Ciurzyńska, W.; Świerczek, J.; Łukiewska, A.

doi:10.1016/s1002-0721(08)60315-4

Cited by 11 publications

(10 citation statements)

References 8 publications

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“…Moreover, the increase of the volume fraction of the paramagnetic Nd 1- Fe 4 B 4 phase from 13.3% for the Re-free sample to 24.9% in the Re-containing sample is derived from the numerical analysis of the Mössbauer spectrum (Table 1). Figure 3 shows experimental Mössbauer spectrum and its components together with hyperfi ne fi eld distribution for the sample containing 9 at.% of Nd, i.e., Nd 9 4 alloys after annealing at 993 K for 10 min are presented in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

“…The two groups of compositions were designed for investigation: 1) Nd 8 4 . All samples were produced by a rapid quenching method on a single roller with a linear velocity on the surface of 30 m/s in a protective Ar atmosphere.…”

Section: Methodsmentioning

confidence: 99%

“…The obtained spectra were fi tted within a thin absorber approximation with the help of NORMOS package software [8]. 4 alloys were performed in the temperature range of 1.9-800 K by a Physical Properties Measurements System Quantum Design. The DC hysteresis loops were recorded in the temperature range of 50-400 K with the step of T = 50 K by a VersaLab System (Quantum Design).…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, the production process of hard magnetic materials is also very important in creation of a microstructure which affects the magnetic properties. Therefore, several methods of production are used to reduce the costs and time needed for material preparation [4,5]. One of the most popular production methods of nanocomposite materials, exhibiting good hard magnetic properties, is a rapid solidifi cation of molten materials on a cooled wheel.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti) alloys

Hasiak

2015

Nukleonika

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Abstract. The microstructure and magnetic properties of nanocomposite hard magnetic Nd-Fe-B-(Re, Ti) materials with different Nd and Fe contents are studied. The role of Re and Ti addition in phase composition and volume fraction of the Nd-Fe-B phase is determined. All samples are annealed at the same temperature of 993 K for 10 min. Mössbauer spectroscopy shows that the addition of 4 at.% of Re to the Nd 8 Fe 78 B 14 alloy leads to creation of an ineligible amount of the magnetically hard Nd 2 Fe 14 B phase. Moreover, the microstructure and magnetic characteristics recorded in a wide range of temperatures for the Nd 8 Fe 79-x B 13 M x (x = 4; M = Re or Ti) alloys are also analyzed.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti) alloys

Hasiak

2015

Nukleonika

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“…1. ) were obtained by a suction-casting method of the molten alloy into a copper mould cooled with water [12]. The structure of the samples was investigated using Mössbauer spectroscopy, X-ray diffractometry and transmission electron microscopy.…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Fe-Based Bulk Amorphous Alloys

Błoch

Nabiałek

Dośpiał

et al. 2015

Archives of Metallurgy and Materials

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Co 10 Ti 2 Y 7 B 20 alloys. The crystallization of the alloys was studied by differential scanning calorimetry (DSC). The amorphicity of the investigated alloys in the as-quenched state was testified using Mössbauer spectroscopy, X-ray diffractometry and transmission electron microscopy. Moreover, X-ray diffractometry was applied to structure investigations of partially crystallized samples. The crystallization process in the investigated alloys occurs in one or two stages. Two peaks in the DSC curves can be overlapped or well separated indicating the complex crystallization processes. From X-ray diffraction we have stated that in both types of devitrification the crystalline phase can be ascribed to the α-FeCo. In the first stage the crystalline grains seem to grow from the nuclei frozen in the samples during the rapid quenching, whereas in the second one both the growth of the existed grains and creation of new ones during annealing may occur.Keywords: bulk amorphous alloys, differential scanning calorimetry (DSC), X-ray diffractometry, transmission electron microscopy, Mössbauer spectroscopy . Amorficzność próbek w stanie po zestaleniu została zbadana przy użyciu spektroskopii Mössbauera, dyfrakcji promieni Röntgena oraz transmisyjnej mikroskopii elektronowej. Ponadto, dyfrakcję promieni X użyto do badań próbek częściowo skrystalizowanych. Na podstawie badań z wykorzystaniem DSC stwierdzono, że krystalizacja może przebiegać w jednym lub w dwóch etapach. Piki na krzywych DSC odpowiadające tym dwóm etapom mogą być położone blisko siebie lub wyraźnie rozdzielone. Pierwsze maksimum odpowiada tworzeniu się ziaren α-FeCo z zarodków powstałych podczas produkcji stopu, drugie natomiast związane jest z procesem tworzenia się ziaren fazy krystalicznej α-FeCo z zarodków powstałych podczas wygrzewania i rozrostem wcześniej powstałych ziaren.

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