Autor: Bednarcik, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of Ball Milling on the Local Atomic Structure of an Amorphous CoFeSiB Alloy
Autorzy:: Bednarcik, J.
Michalik, S.
Kollar, P.
Roth, S.
Powiązania:: https://bibliotekanauki.pl/articles/1534068.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.43.Dq
61.05.cp
64.70.dg
75.30.Kz
Opis:: It follows from experimental observations that ball milling induces substantial changes in an amorphous $Co_{70.3}Fe_{4.7}Si_{10}B_{15}$ (at.%) alloy. X-ray diffraction indicates formation of nanocrystalline bcc-(Co,Fe) phase during ball milling. As a consequence crystallization sequence is altered and the total enthalpy of crystallization reduces with the milling time. Furthermore thermomagnetic measurements reveal that specific magnetization and Curie temperature of amorphous phase are influenced by ball milling.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 825-826
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Microstructural Study of Fe-Si(Ge)-Nb-Cu-B Finemet Alloys
Autorzy:: Michalik, S.
Bednarcik, J.
Brzózka, K.
Sovak, P.
Górka, B.
Powiązania:: https://bibliotekanauki.pl/articles/1534048.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.cp
61.05.C-
61.46.Hk
Opis:: Structural changes in Finemet based alloys invoked by germanium replacement for silicon were investigated using the X-ray diffraction, the X-ray absorption spectroscopy and the Mössbauer spectroscopy. Ge substitution preserves a nanostructural character of annealed samples at temperature 550°C; specifically the formation of a $DO_3$-type with about 19 at.% of (Si,Ge) was confirmed. The mean size of nanocrystals was estimated to be about 7 nm.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 818-819
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The Structural Stability of Soft Magnetic Fe-Co-Zr-W-B Metallic Glasses Investigated by the in-situ X-ray Diffraction
Autorzy:: Michalik, S.
Bednarcik, J.
Pawlik, P.
Matija, R.
Sovak, P.
Powiązania:: https://bibliotekanauki.pl/articles/1366893.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.cp
61.43.Dq
Opis:: The atomic structure of as-prepared $Fe_{61}Co_{(14-x)}Zr_{5}W_{x}B_{20}$ (x=1, 2 and 4) ribbon samples and their thermal stability were investigated by in-situ high-energy X-ray diffraction experiments. It was observed that higher W concentration causes the tiny shift of the main peak of the reduced atomic pair distribution function to higher values of interatomic distances and increases the coefficient of volume thermal expansion. The crystallization process occurs in two steps and is qualitatively the same for all studied specimens. Firstly the $Fe_{23}B_{6}$ phase is created and later is transformed to other types of borides together with the creation of a Fe-based phase.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 66-67
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Isobaric Thermal Expansion and Isothermal Compression of Powdered NiFe Based Alloys Studied by In-Situ EDXRD
Autorzy:: Olekšáková, D.
Füzer, J.
Kollár, P.
Bednarčík, J.
Lathe, C.
Powiązania:: https://bibliotekanauki.pl/articles/1200812.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Bb
61.05.cp
Opis:: The aim of the present work was to study the isothermal compression and isobaric thermal expansion behaviour of ball-milled NiFe (81 wt.% of Ni) and NiFeMo (79 wt.% of Ni, 16 wt.% of Fe) alloy and follow its phase evolution when exposed to high pressure and temperature. In-situ pressure-temperature energy dispersive X-ray (EDXRD) diffraction experiments were performed at the MAX80 instrument (beamline F2.1). The compressibility of NiFe alloy at 400 °C was evaluated for pressure values of up to 3.5 GPa. The EDXRD spectra revealed the presence of cubic FeNi_{3} phase as determined from the shift of (111), (200) and (220) reflection lines in corresponding EDXRD spectra.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 128-129
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Structure and Magnetic Properties οf Fe(Mn)-Si-B-Nb-Cu Alloys
Autorzy:: Michalik, S.
Sovak, P.
Bednarcik, J.
Kollar, P.
Girman, V.
Powiązania:: https://bibliotekanauki.pl/articles/1810612.pdf
Data publikacji:: 2009-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.cp
75.50.Tt
77.80.Bh
Opis:: According to high energy X-ray diffraction measurements no significant changes were observed in a short range atomic order of amorphous ribbons $Fe_{73.5-x}Mn_xCu_1Nb_3Si_{13.5}B_9$ (x=1 up to 15 at.%). Thermal stability of the as-prepared alloys was investigated by differential scanning calorimetry and by in situ X-ray diffraction measurements. The two-step crystallization process was revealed, crystallization temperatures $T_{x1}$ and $T_{x2}$ were influenced by Mn content (thermal separation between $T_{x1}$ and $T_{x2}$ completely vanished for x=9). Nanocrystalline state of annealed samples was confirmed by electron transmission microscopy. The influence of Mn substitution on magnetic properties was confirmed by thermomagnetic measurements.
Źródło:: Acta Physica Polonica A; 2009, 115, 1; 399-402
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Effect of Annealing Time on Structure of $Fe_{72.5}Cu_{1}Nb_{2}Mo_{2}Si_{15.5}B_{7}$ Alloy
Autorzy:: Nemcová, V.
Girman, V.
Hrabčáková, V.
Michalik, Š.
Bednarčík, J.
Almáši, M.
Sovák, P.
Powiązania:: https://bibliotekanauki.pl/articles/1367403.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.cp
61.46.Hk
61.05.J-
Opis:: The process of a primary crystallization of the $Fe_{72.5}Cu_{1}Nb_{2}Mo_{2}Si_{15.5}B_{7}$ alloys was investigated by differential thermal analysis (DTA), x-ray diffraction (XRD) and transmission electron microscopy (TEM). Amorphous ribbons were isothermally annealed for 0.5, 2, 6, 30 and 150 minutes at 520 °C. Both, the XRD and TEM study showed that the level of devitrification of the sample increases with the annealing time. The above mentioned techniques confirmed the presence of the nanocrystalline grains of the $Fe_{3}Si$ phase and enable us to study the evolution of the identified phase.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 116-117
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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