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Wyświetlanie 1-15 z 19
Tytuł:
Failure Behaviour of Fe- and Co-Based Amorphous Soft Magnetic Ribbons
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Janák, G.
Švec, T.
Konč, M.
Powiązania:
https://bibliotekanauki.pl/articles/1813535.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.25.Mn
Opis:
Fractographic analysis of Co- and Fe-based high strength soft magnetic materials showed the high localization of the plastic deformation and the ductility in narrow shear bands. The estimated fracture toughness of these materials is closely associated with the scale of the local plastic zone.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 95-98
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fragmentation of Co-Fe-Ta-B Soft Magnetic Amorphous Alloy
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Huráková, M.
Tabachnikova, E.
Powiązania:
https://bibliotekanauki.pl/articles/1387048.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.25.Mn
Opis:
The main limitation of high-strength Co-based bulk metallic glasses for their application as structural materials is the large brittleness. Spontaneously emerging cracks in the alloy degrade the magnetic properties. We analyzed the failure characteristics of $Co_{43}Fe_{20}Ta_{5.5}B_{31.5}$ bulk soft magnetic metallic glass deformed in the compression at room temperature and the low strain rate. Under loading the amorphous structure stores high elastic energy. During the failure this energy is released and the alloy breaks into small particles or powder exhibiting a fragmentation mode.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 558-560
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Plastic Deformation on Magnetic Transition in Soft Magnetic Amorphous Alloys
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Powiązania:
https://bibliotekanauki.pl/articles/1428973.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
Opis:
The influence of the intensive plastic deformation on the structure of ferromagnetic amorphous alloys has been studied by means of thermoanalytical methods. It was shown that the work of plastic deformation led to the local heating in thin shear band layers and the dissipation of the energy caused structural changes in the region outside these bands. The plastic deformation influences the structure of the alloys and their structural sensitive magnetic properties.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1273-1275
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low Temperature Failure of $Al_{90}Fe_7Ta_3$ Amorphous Alloys
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Bengus, V.
Tabachnikova, E.
Shumilin, S.
Podolskiy, A.
Powiązania:
https://bibliotekanauki.pl/articles/1534053.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.mm
Opis:
The fractographic analysis was used for the interpretation of ultra-low temperature dependences of yield or fracture stress. Analysis of fracture morphology revealed that dominantly chevron morphology is present and that the failure of this amorphous material initiates at low temperatures at geometrical imperfections of ribbons and these failures are often presented as a premature failure.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 823-824
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoscale Fracture Morphologies of Soft Magnetic CoFeTaB Amorphous Alloy
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Huráková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1367300.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.25.Mn
Opis:
We analyzed the failure characteristics of the bulk metallic glass $Co_{43}Fe_{20}Ta_{5.5}B_{31.5}$ (at.%) deformed by compression and by bending of the ribbons. Under the load the amorphous structure can store high elastic energy. The surface morphology of nanoscale fracture is in accord with the micromechanisms of the failure of the amorphous structure. The fracture surface consists of a smooth mirror cleavage zone and a river pattern zone with nanosized dimples, arranged in lines respecting the periodic corrugation zones, oriented perpendicular to the crack propagation direction. The presence of the failure initiation centers in the ribbon influences the dynamics of crack propagation and also the surface morphology of the fracture.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 96-97
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Magnetic Particles on the Nematic Droplets Formation in Liquid Crystal
Autorzy:
Majorošová, J.
Gdovinová, V.
Tomašovičová, N.
Juríková, A.
Závišová, V.
Jadzyn, J.
Kopčanský, P.
Powiązania:
https://bibliotekanauki.pl/articles/1032205.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Mm
61.30.Gd
67.30.Hm
Opis:
In this work the thermotropic nematic liquid crystal 4-trans-4'-n-hexyl-cyclohexyl-isothiocyanato-benzene (6CHBT) was dissolved in phenyl-isothiocyanate and doped with spherical magnetic particles with volume concentration ϕ₁=10¯⁴ and ϕ₂=10¯³. The influence of the volume concentration on the phase transitions from isotropic to nematic phase was studied by three experimental methods: optical microscopy, differential scanning calorimetry, and dielectric measurements. The obtained results confirmed the coexistence of isotropic and nematic phase, i.e. nematic or ferronematic droplets in isotropic phase in a wide temperature range between nematic and isotropic phase.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 955-957
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of $Fe_3O_4$ Magnetic Nanoparticles Modified with Dextran and Investigation of Their Interaction with Protein Amyloid Aggregates
Autorzy:
Koneracká, M.
Antošová, A.
Závišová, V.
Lancz, G.
Gažová, Z.
Šipošová, K.
Juríková, A.
Csach, K.
Kováč, J.
Tomašovičová, N.
Fabián, M.
Kopčanský, P.
Powiązania:
https://bibliotekanauki.pl/articles/1535048.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Mm
87.14.em
87.19.xr
Opis:
Functionalised magnetic nanoparticles composed of $Fe_3O_4$ particles stabilised by sodium oleate and subsequently modified with dextran (MFDEX) were prepared by the co-precipitation method. Their morphology and particle size distribution were observed by scanning electron microscopy and photon cross correlation spectroscopy. In order to confirm the modification of magnetite surface with dextran physical techniques, including infrared spectroscopy, thermal analysis, and magnetic measurement, were used. Finally, the effect of MFDEX on amyloid fibrillar aggregates of human insulin and hen egg white lysozyme, typical amyloidogenic proteins, was investigated. In vitro interaction of MFDEX with protein amyloid fibrils resulted into destruction of amyloid aggregates. The anti-amyloid activity makes MFDEX of potential interest as therapeutic agent against amyloid-related diseases.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 983-985
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Changes in Deformed Soft Magnetic Ni-Based Metallic Glass
Autorzy:
Juríková, A.
Csach, K.
Miškuf, J.
Ocelík, V.
Powiązania:
https://bibliotekanauki.pl/articles/1810607.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
Opis:
The effects of intensive plastic deformation of the soft magnetic metallic glass Ni-Si-B on the structural relaxation were examined. The enthalpy changes studied by differential scanning calorimetry revealed that the intensive plastic deformation was associated with the partial structural relaxation of the amorphous structure.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 393-395
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Relaxation of Ni-Si-B Amorphous Ribbon
Autorzy:
Juríková, A.
Csach, K.
Miškuf, J.
Ocelík, V.
Powiązania:
https://bibliotekanauki.pl/articles/1813536.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
Opis:
The structural relaxation of the Ni-Si-B amorphous ribbon was studied by means of differential scanning calorimetry and thermomechanical analysis. It was shown that considerable length changes associated with reversible structural relaxation were revealed after a previous creep applied at higher temperatures.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 99-102
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Analysis of Magnetic Nanoparticles Modified with Dextran
Autorzy:
Juríková, A.
Csach, K.
Miškuf, J.
Koneracká, M.
Závišová, V.
Kubovčíková, M.
Kopčanský, P.
Powiązania:
https://bibliotekanauki.pl/articles/1429065.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
65.80.-g
Opis:
In the work the thermal behaviour of the magnetic nanoparticles modified with polysaccharide dextran of different weight ratios to the magnetite $Fe_3O_4$ was investigated using thermoanalytical methods - differential scanning calorimetry and thermogravimetric analysis. The adsorption of dextran on the magnetic nanoparticles was confirmed and the influence of the dextran amount in the modified magnetic fluid on the thermal decomposition of the complex system was studied. The results showed that magnetite catalyzed the thermal decomposition of dextran, the adsorbed dextran showed lower initial decomposition temperatures in comparison with the free one.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1296-1298
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Analysis of Magnetic Polymer Nanospheres for Drug Targeting
Autorzy:
Juríková, A.
Csach, K.
Miškuf, J.
Koneracká, M.
Závišová, V.
Kopčanský, P.
Powiązania:
https://bibliotekanauki.pl/articles/1535061.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
65.80.-g
47.63.mh
Opis:
Poly(D,L-lactic-co-glycolic) acid (PLGA) polymer nanospheres loaded with different input amounts of anticancer drug taxol were prepared by the modified nanoprecipitation method. Magnetite was incorporated into the polymer nanospheres to impart them superparamagnetic properties. Thermal properties of the drug loaded magnetic polymer nanospheres were characterized using differential scanning calorimetry and thermogravimetric analysis. The solid state solubility of taxol in PLGA nanospheres and the influence of external magnetic field on their thermal stability were estimated. The investigations have revealed that the samples of dried taxol loaded magnetic PLGA nanospheres undergo mass loss at three stages during heating.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 990-992
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Stability of Bent-Core Liquid Crystals Doped with Magnetic Nanoparticles
Autorzy:
Juríková, A.
Csach, K.
Miškuf, J.
Tomašovičová, N.
Mitróová, Z.
Závišová, V.
Koneracká, M.
Kopčanský, P.
Timko, M.
Éber, N.
Fodor-Csorba, K.
Vajda, A.
Powiązania:
https://bibliotekanauki.pl/articles/1387994.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.30.-v
64.70.mj
65.80.-g
Opis:
In the work phase transitions in bent-core liquid crystals were studied using differential scanning calorimetry. For the binary mixture of bent-core molecules with 50 wt% of rod-shaped compound, the nematic to smectic transition occured below 40°C and the crystallization temperature shifted to sub-ambient temperatures. The influence of doping of the bent-core liquid crystals with magnetic nanoparticles on the kinetics of observed phase transitions was studied. The phase transition temperatures were shifted depending on the nanoparticle type and changed with varying cooling rate for all studied liquid crystal samples.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 638-640
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Stability of Amorphous Alloy of Modified Finemet Type
Autorzy:
Huráková, M.
Csach, K.
Juríková, A.
Miškuf, J.
Rajňák, M.
Ďurišin, M.
Kvačkaj, T.
Powiązania:
https://bibliotekanauki.pl/articles/1387067.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
62.20.de
Opis:
The Finemet type amorphous alloys are well known as high frequency soft magnetic materials. They have good soft magnetic properties which are characterized by low coercive force and high permeability because of the lack of crystalline anisotropy. The structural stability of the amorphous ribbon of Finemet type modified by Mn, Al and Cr prepared by melt-spinning process was studied using differential scanning calorimetry and dynamical mechanical analysis. With increase of the crystalline portion in the sample, the Curie transition is shifted to the higher temperatures. The magnetic relaxation processes at frequencies above 10⁴ Hz were detected by mass magnetic susceptibility measurement.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 564-566
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increasing of selenium content and qualitative parameters in garden pea (Pisum sativum L.) after its foliar application
Autorzy:
Hegedűsová, A.
Mezeyová, I.
Hegedűs, O.
Andrejiová, A.
Juríková, T.
Golian, M.
Lošák, T.
Powiązania:
https://bibliotekanauki.pl/articles/11543588.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
The presented paper deals with monitoring of the ways of selenium (Se) content increase by foliar biofortification with inorganic Se in two varieties of garden pea Pisum sativum L. (Premium, Ambassador) in the conditions of south Slovakia in 2014–2015. The results of experiments show that treatment of plants with two doses of Se concentration (50 g and 100 g Se ha–1 in the form of a sodium selenate anhydrous solution) at the flowering stage significantly increased the total Se content in the seeds of both varieties. Following the results by the consumption of 25 g of dried seeds of peas or 100 g of fresh pea seeds after the biofortification with 100 g Se ha–1 a recommended daily dose of Se in humans may be covered. The significantly positive influence of Se application on the total polyphenols content (TPC) has been confirmed in the both varieties after application of dosage in 100 g Se ha–1 (52% and 33%). A significant increase in the average value of total antioxidant capacity (TAC by DPPH method) in garden pea var. Ambassador was observed after the application of both doses of Se, in case of Premium variety only after application with a 100 g Se ha–1. Significantly increasing level of TAC by PCL (photochemiluminescence) method was found out only in case of var. Premium.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 6; 3-17
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Creep Behaviour of Co-Based Amorphous Alloys
Autorzy:
Csach, K.
Miškuf, J.
Juríková, A.
Vojtaník, P.
Powiązania:
https://bibliotekanauki.pl/articles/1813534.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
Opis:
The detailed study of the temperature dependence of the viscosity of (Co, Fe)-(Si, B) amorphous metallic alloys up to crystallization temperatures was carried out. The kinetics of the non-equilibrium viscosity was described using Vogel-Fulcher-Tammann law below the glass transition temperature.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 91-94
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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