Mechanical and magnetic properties of (Fe72Mo4B24)100−xTbx (x=4, 5, 6, 7at.%) bulk glassy alloys

Hong, Jie; Luo, Wei; Tao, Shan; Yan, Mi

doi:10.1016/j.jallcom.2010.06.061

Cited by 22 publications

(14 citation statements)

References 36 publications

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“…The magnetic material used in micro-motors should have a good coefficient of fulfilment and, of course, excellent magnetic and mechanical properties. [1][2][3][4][5][6] Bulk amorphous alloys include highly promising materials for electrical-engineering applications. [7][8][9][10] Conventional amorphous alloys, manufactured in the form of a strip (ribbon), cannot be used for the construction of micro-motors because the strip shape is not suitable for the application.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties and microstructure of a bulk amorphous Fe61Co10Ti3Y6B20 alloy, fabricated as rods and tubes

Nabiałek¹,

Błoch²,

Szlązak³

et al. 2016

Mater. Tehnol.

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In this paper, studies are presented that characterize a bulk amorphous Fe61Co10Ti3Y6B20 alloy. Samples were fabricated in two forms: as a rod of 1 mm in diameter and as a tube of 1 mm in the outer diameter. The investigated material was obtained using the injection method, whereby the liquid alloy was injected into a copper mould. Using an X-ray diffractometer, a scanning electron microscope and computer tomography, the microstructures of these rapidly cooled samples were studied. Based on the obtained results, it was found that both the rod and the tube were fully amorphous. The cross-sections of the broken rod and tube were characterized by a mixed rupture consisting of smooth chevron and river patterns. This shows that there are regions of different ductility distributed throughout the volume of a sample. Three-dimensional images of the investigated materials, obtained with computer tomography, allowed the determination of the contribution of the pores (and their size) to the total volumes of the samples. The investigated alloy is a ferromagnetic material exhibiting good soft-magnetic properties such as a high saturation magnetization, a high magnetic permeability and a low value of the coercive field. The technique of injecting the liquid alloy into a copper mould, combined with the suction-casting method, can be used to produce toroidal cores that exhibit highly promising properties for a successful application in the construction of electric motors. Keywords: bulk amorphous alloys, X-ray diffractometry, electron scanning microscopy, computer tomography, saturation magnetization, coercivitŷ lanek prikazuje {tudijo zna~ilnosti masivne amorfne zlitine Fe61Co10Ti3Y6B20, katere vzorci so bili izdelani na dva na~ina: kot palica premera 1 mm in kot cev z zunanjim premerom 1 mm. Preiskovani material je bil izdelan z vbrizgavanjem, saj je bila talina vbrizgana v bakreno kokilo. Mikrostrukture hitro strjenih zlitin so bile prou~evane s pomo~jo rentgenskega difraktometra, z vrsti~nim elektronskim mikroskopom in z ra~unalni{ko tomografijo. Na podlagi dobljenih rezultatov je bilo ugotovljeno, da sta palica in cev popolnoma amorfni. Presek prelomljene palice in cevi ima me{an prelom, ki sestoji iz gladkih povr{in in stopnic v obliki re~ic. To pomeni, da so razli~na podro~ja duktilnosti razporejena po volumnu vzorca. Trodimenzionalne slike preiskovanih materialov, dobljenih s pomo~jo ra~unalni{ke tomografije, omogo~ajo dolo~itev dele`a por (in njihovih velikosti) v celotnem volumnu vzorcev. Preiskovana zlitina je feromagnetna in ima dobre mehko magnetne lastnosti, kot so: visoko nasi~enje pri magnetizaciji, visoka magnetna permeabilnost in majhna vrednost koercitivnega polja. Tehniko vbrizgavanja teko~e litine v bakreno kokilo, v kombinaciji z livno metodo z vsesavanjem, se lahko uporabi za izdelavo toroidnih jeder, ki imajo dobre lastnosti za uspe{no uporabo pri konstrukciji elektromotorjev. Klju~ne besede: masivne amorfne zlitine, rentgenski difraktometer, vrsti~ni elektronski mikroskop, ra~unalni{ka tomografija, nasi...

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Section: Introductionmentioning

confidence: 99%

Magnetic properties and microstructure of a bulk amorphous Fe61Co10Ti3Y6B20 alloy, fabricated as rods and tubes

Nabiałek¹,

Błoch²,

Szlązak³

et al. 2016

Mater. Tehnol.

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“…3,4 One of the most interesting groups of amorphous alloys includes some of the iron-based alloys, which exhibit excellent magnetic and mechanical properties. [5][6][7][8][9] …”

Section: Introductionmentioning

confidence: 99%

Microstructure, magnetic and mechanical properties of the bulk amorphous alloy Fe61Co10Ti4Y5B20

Błoch¹,

Nabiałek²,

Gondro³

2015

Mater. Tehnol.

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This paper presents the results of the studies into the microstructure, the magnetic and mechanical properties of bulk amorphous alloy samples. The samples were produced in the form of rods, using the suction-casting method. The structure and microstructure of the prepared samples were examined using an X-ray diffractometer, a scanning electron microscope and a computer tomograph. The magnetic and mechanical properties were studied using a Lakeshore vibrating-sample magnetometer, a Zwick testing machine and a FutureTech microhardness tester. On the basis of the obtained results, it was found that, throughout their volumes, the investigated rods have an amorphous structure. Using computer tomography, three-dimensional images of the tested samples were reconstructed, enabling the imaging of the material defects occurring throughout the bulk volumes of the samples. Additionally, the tested Fe-based material should be included in the subset of the electrotechnical materials exhibiting good soft magnetic and mechanical properties. In view of their properties, these materials can be successfully used in energy-efficient transformers, replacing the conventional Fe-Si steel in this and other applications. Keywords: bulk amorphous alloys, electron scanning microscopy, computer tomography, saturation magnetization, coercivitŷ lanek predstavlja rezultate {tudija mikrostrukture, magnetnih in mehanskih lastnosti vzorcev masivne amorfne zlitine. Le-ti so bili izdelani v obliki palic z uporabo ulivanja z nasesavanjem. Struktura in mikrostruktura pripravljenih vzorcev je bila preiskovana z rentgenskim difraktometrom, z vrsti~nim elektronskim mikroskopom in z ra~unalni{kim tomografom. Magnetne in mehanske lastnosti so bile preiskovane z magnetometrom z vibrirajo~im vzorcem Lakeshore, s preizkusno napravo Zwick in z merilnikom mikrotrdote FutureTech. Dobljeni rezultati so pokazali, da imajo preiskovane palice po vsem volumnu amorfno strukturo. Z ra~unalni{ko tomografijo so bile pripravljene 3D-slike preiskovanih vzorcev, kar omogo~a ugotavljanje napak v materialu, ki se pojavljajo po vsem volumnu vzorca. Preizku{eni materiali na osnovi`eleza naj bi bili vklju~eni v podskupino materialov za elektrotehniko z dobrimi mehkomagnetnimi in mehanskimi lastnostmi. Glede na njihove lastnosti bi bili lahko ti materiali uspe{no uporabljeni za energijsko u~inkovite transformatorje, kjer bi nadomestili Fe-Si-jekla, in tudi na drugih podro~jih. Klju~ne besede: masivne amorfne zlitine, vrsti~na elektronska mikroskopija, ra~unalni{ka tomografija, nasi~enje magnetenja, koercitivnost

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“…* Corresponding author. It has been found that the minor addition of rare-earth (RE) element has a beneficial effect on GFA, mechanical and magnetic properties of Fe(Co)-based BMGs [13][14][15]. Consequently, a number of Fe(Co)-based BMGs as Fe-Co-Pr-B and Fe-Co-Y-B alloys were developed [16,17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, thermal stability and properties of [(Fe1−xCox)72Mo4B24]94Dy6 bulk metallic glasses

Tao

Ahmad

Hong

et al. 2011

Journal of Alloys and Compounds

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Mechanical and magnetic properties of (Fe72Mo4B24)100−xTbx (x=4, 5, 6, 7at.%) bulk glassy alloys

Cited by 22 publications

References 36 publications

Magnetic properties and microstructure of a bulk amorphous Fe61Co10Ti3Y6B20 alloy, fabricated as rods and tubes

Magnetic properties and microstructure of a bulk amorphous Fe61Co10Ti3Y6B20 alloy, fabricated as rods and tubes

Microstructure, magnetic and mechanical properties of the bulk amorphous alloy Fe61Co10Ti4Y5B20

Synthesis, thermal stability and properties of [(Fe1−xCox)72Mo4B24]94Dy6 bulk metallic glasses

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