Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "T.K." wg kryterium: Autor

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 21
Tytuł:
Phase Composition of the Surface Zone of Nitrided Cast Steels and Their Mechanical Properties
Autorzy:
Brzózka, K.
Budzynowski, T.
Górka, B.
Powiązania:
https://bibliotekanauki.pl/articles/1506569.pdf
Data publikacji:
2011-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.66.Dk
81.65.Lp
81.40.-z
76.80.+y
61.05.cp
68.37.-d
81.40.Pq
Opis:
Conversion electron Mössbauer spectroscopy and structural X-ray diffractometry have been used to study nitrides formation in the surface layer of cast steels subjected previously to low-temperature nitriding. It has been found that creation of iron-nitrogen phases strongly depends on sample composition. Nitrides: $γ^\prime-Fe_{4}N$ and $\epsilon-Fe_{2-3}N$ arise in the course of the nitriding procedure in most investigated cast steels. Moreover, considerable changes in their microstructure and tribological properties occur. The depth profile of nitrides has been derived for selected cast steel.
Źródło:
Acta Physica Polonica A; 2011, 119, 1; 28-32
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of the superficial region and mechanical properties of nitrided cast steels
Autorzy:
Górka, B.
Budzynowski, T. W.
Brzózka, K.
Powiązania:
https://bibliotekanauki.pl/articles/147910.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cast steel
microhardness
Mössbauer spectroscopy
nitriding
wear resistance
Opis:
A series of cast steels were subjected to two-stage low-temperature nitriding. Mossbauer, XRD and mechanical investigations were carried out for both as-cast and nitriding materials in order to determine phase composition (especially the content of gamma'-Fe4N and epsilon-Fe2-3N), microhardness of the superficial region as well as tribological properties. It has been stated that the relative content of iron-nitrogen phases strongly depends on chemical composition of the cast steel and the effective thickness of the surface layer comprising iron nitrides is less than 0.015 mm. Considerable increase of surface microhardness and wear resistance of nitrided specimens in comparison with their as-cast counterparts has been observed. It has been found that the values of microhardness of nitrided samples at the surface are above twice larger than those in the core.
Źródło:
Nukleonika; 2013, 58, 1; 117-121
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finemet Thin Films Substituted by Chromium - CEMS and MOKE Study
Autorzy:
Brzózka, K.
Szumiata, T.
Sovák, P.
Górka, B.
Hibner, K.
Balcerski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1533968.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Bb
61.46.Hk
76.80.+y
78.20.Ls
Opis:
Conversion electron Mössbauer spectroscopy and magneto-optical Kerr effect were applied to investigate hyperfine interactions and macroscopic magnetic properties of Finemet-type thin films. Phase analysis as well as compositional evolution of hyperfine parameters and coercivity was performed in the range of chromium percentage 0 ≤ x ≤ 14. Essential differences in structure and hyperfine parameters were found for films of different chromium concentration. Coercivity shows non-monotonic dependence with minimal value at x = 5.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 794-796
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetism and structure evolution in Ni-Zn ferrites thin films - CEMS study
Autorzy:
Szumiata, T.
Gzik-Szumiata, M.
Brzózka, K.
Górka, B.
Gawroński, M.
Javed, A.
Farman, K.
Fatima, T.
Powiązania:
https://bibliotekanauki.pl/articles/1054837.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
81.15.Fg
81.05.Je
Opis:
In this work, a ⁵⁷Fe conversion electron Mössbauer spectrometry and X-ray diffraction have been utilized in order to investigate the structural and magnetic order in 500 nm thick Ni-Zn ferrite films deposited on Si(100) substrate by laser ablation. Considering the contributions of the conversion electron Mössbauer subspectra corresponding to the tetrahedral (A) and octahedral (B) sites, the spinel inversion parameter in [Zn_{x}Fe_{1-x}]^{A}[Ni_{1-x}Fe_{1+x}]^{B}O₄ films has been estimated. The hyperfine field (B_{hf}) values in the investigated Ni-Zn ferrites thin films are about 5-8% smaller than those of bulk ferrites, which could be a sign of thermal magnetic relaxations due to the size effects. The distribution of hyperfine magnetic field directions was found to be affected by perpendicular anisotropy.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 836-838
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase Composition and Magnetic Properties of Nanoperm Thin Films Doped with Yttrium
Autorzy:
Brzózka, K.
Sovák, P.
Szumiata, T.
Górka, B.
Gawroński, M.
Powiązania:
https://bibliotekanauki.pl/articles/1428972.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Bb
75.70.-i
76.80.+y
78.20.Ls
Opis:
Thin films of Nanoperm alloys with partial substitution of iron by yttrium are the subject of investigations. The attention is fixed on the influence of yttrium substitution on structure and magnetic characteristics of the samples. The effect of film thickness is also considered. Conversion electron Mössbauer spectroscopy and magneto-optic Kerr effect were used to derive hyperfine parameters and coercive field, respectively. Coexistence of crystalline bcc-Fe phase and an amorphous one with diverse proportion was stated in most of the samples. It was found that surface and interface regions contribute to the magnetic properties of films.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1270-1272
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Magnetic Hyperfine Field Distribution for Spherical Nanoparticles of bcc Structure
Autorzy:
Szumiata, T.
Gzik-Szumiata, M.
Brzózka, K.
Gawroński, M.
Górka, B.
Powiązania:
https://bibliotekanauki.pl/articles/1813877.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Bf
76.80.+y
Opis:
We propose a simple model for temperature evolution of magnetic hyperfine field distribution of spherical bcc Fe nanoparticles. We performed mean field approximation calculations of mean spin value in each spherical shell of nanoparticle. Considering magnetic hyperfine field values reported for iron thin films we predicted possible values of hyperfine fields in the internal and surface region of the particles as a function of temperature.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 537-540
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer Study of Magnetic Texture of Finemet-Type Ribbons
Autorzy:
Brzózka, K.
Sovák, P.
Górka, B.
Szumiata, T.
Gawroński, M.
Powiązania:
https://bibliotekanauki.pl/articles/1506573.pdf
Data publikacji:
2011-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.50.Kj
81.40.Ef
Opis:
Magnetic texture of amorphous Finemet-type alloys substituted by Co, Ni, Mn, Ge and V was investigated by means of Mössbauer spectroscopy using various angular configurations. Samples in form of ribbons were manufactured by single-roller melt spinning technique. In most of investigated alloys some preference of alignment of atomic magnetic moments in-plane of sample is stated, except of some alloys substituted by germanium in which slight tendency to out-of plane spin orientation is proved.
Źródło:
Acta Physica Polonica A; 2011, 119, 1; 33-36
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress Monitoring in Steel Elements via Detection of AC Magnetic Permeability Changes
Autorzy:
Szumiata, T.
Hibner, K.
Dziewiecki, K.
Mazur, Z.
Gockiewicz, A.
Gzik-Szumiata, M.
Górka, B.
Witoś, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030407.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.80.+q
75.60.Ej
75.50.Bb
75.30.Gw
62.20.D-
Opis:
The influence of mechanical stress on low frequency AC magnetic permeability was studied. The cold-drawn bars with C45 steel were subjected to investigation. The tensile stress (within elastic regime) was applied by means of material testing machine. Simple measuring system was assembled, which consisted of: function generator with magnetizing coil, detection coil and precise AC voltmeter. The registered changes of induced voltage were proportional to the change of magnetic permeability of the stretched rods. The obtained results were almost frequency-independent due to low frequency limit (250-500 Hz, weak eddy currents, no spin-origin energy dissipation). A significant magneto-mechanical hysteresis was observed slightly evolving from cycle to cycle with tendency of stabilization. The extension of basic Stoner-Wohlfarth model of magnetic permeability allowed to fit the data reproducing hysteretic behavior and considering the relaxation of the internal stress. The proposed, low-cost method is suitable in the industrial applications for stress control in large-sized steel elements.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 719-721
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hyperfine fields and magnetoelastic surface effects in Fe72Cu1.5Nb4Si13.5B9 nanocrystalline alloy
Autorzy:
Szumiata, T.
Gawroński, M.
Górka, B.
Brzózka, K.
Blázquez-Gámez, J.
Kulik, T.
Żuberek, R.
Ślawska-Waniewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/148767.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
FINEMET
Mössbauer spectroscopy
nanocrystalline alloys
surface effects
surface magnetostriction
Opis:
In this work hyperfine fields of two-phase nanocrystalline Fe72Cu1.5Nb4Si13.5B9 alloys were studied in order to verify the existence of surface effects. To obtain a series of nanocrystalline samples with small grains of different sizes, a special non- -isothermal annealing procedure of an initially amorphous ribbon was applied. In the case of samples with a significant amount of crystallites, a high field (about 27.5 T) component of continuous part of the hyperfine field distribution was found that could be attributed to boundary regions between the grains and rest of the sample. The existence of the surface effects was confirmed in the magnetostrictive experiment.
Źródło:
Nukleonika; 2003, 48,suppl.1; 85-88
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of Co and V substitution on structural properties of FINEMET-type alloys
Autorzy:
Szumiata, T.
Gawroński, M.
Brzózka, K.
Górka, B.
Sovák, P.
Pavlík, P.
Powiązania:
https://bibliotekanauki.pl/articles/148217.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
magnetic texture
CEMS
polarized radiation
Opis:
The effect of addition of Co and V on the hyperfine parameters of amorphous as well as nanocrystalline Finemet-type alloys has been studied by means of transmission Mössbauer spectrometry. It was stated that these elements infiltrate into crystalline grains in the course of crystallization, what causes alteration in structure. Different evolution of magnetic hyperfine field is reported in both cases and analyzed. In the series of alloys substituted by vanadium, the substantial paramagnetic component attributed to iron-poor regions in the amorphous remainder was found.
Źródło:
Nukleonika; 2007, 52, supl. 1; 21-28
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Milling and Compaction Processes οn Magnetic Properties of FeCo Powder
Autorzy:
Szumiata, T.
Gzik-Szumiata, M.
Brzózka, K.
Gawroński, M.
Górka, B.
Kollár, P.
Olekšáková, D.
Polański, K.
Szmaja, W.
Powiązania:
https://bibliotekanauki.pl/articles/1810615.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.50.Bb
75.60.Ej
81.20.Ev
Opis:
Magnetic and structural studies were performed on $Fe_{50}Co_{50}$ material. The samples (disk-shaped, diameter: 10 mm, thickness: 2.5 mm) were fabricated by compaction of powder under pressure of 800 MPa for 5 min at temperatures 300-600°C. The powder was obtained by milling of $Fe_{50}Co_{50}$ alloy swarfs in high-energy planetary mill. The milling time varied from 1 h to 40 h. In the course of milling process the mean size of alloy pieces was decreasing from about 0.5 mm to 0.05 mm (scanning electron microscopy), which provided more compact structure after compression. The annealing process during compaction strongly reduces a coercive field of the samples. Parameters of conversion electron Mössbauer spectra are almost the same for all samples, which points to not significant changes of atomic and magnetic order after milling and compacting.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 403-405
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Iron-containing phases in metallurgical and coke dusts as well as in bog iron ore
Autorzy:
Szumiata, T.
Rachwał, M.
Magiera, T.
Brzózka, K.
Gzik-Szumiata, M.
Gawroński, M.
Górka, B.
Kyzioł-Komosińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/148303.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
metallurgical dusts
coke dusts
bog ore
phase analysis
Mössbauer spectrometry
magnetic susceptibility
Opis:
Several samples of dusts from steel and coke plants (collected mostly with electro filters) were subjected to the investigation of content of mineral phases in their particles. Additionally, sample of bog iron ore and metallurgical slurry was studied. Next, the magnetic susceptibility of all the samples was determined, and investigations of iron-containing phases were performed using transmission Mössbauer spectrometry. The values of mass-specific magnetic susceptibility varied in a wide range: from 59 to above 7000 × 10−8 m3kg−1. The low values are determined for bog iron ore, metallurgical slurry, and coke dusts. The extremely high was obtained for metallurgical dusts. The Mössbauer spectra and X-ray diffraction patterns point to the presence of the following phases containing iron: hematite and oxidized magnetite (in coke and metallurgical dusts as well as metallurgical slurry), traces of magnetite fi ne grains fraction (in metallurgical dusts), amorphous glassy silicates with paramagnetic Fe3+ and Fe2+ ions, traces of pyrrhotite (in coke dusts), α-Fe and nonstoichiometric wüstite (in metallurgical slurry), as well as ferrihydrite nanoparticles (in bog iron ore). For individual samples of metallurgical dusts, the relative contributions of Fe2+/3+ ions in octahedral B sites and Fe2+ ions in tetrahedral A sites in magnetite spinel structure differs considerably.
Źródło:
Nukleonika; 2017, 62, 2; 187-195
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of Al doping on microstructure and hyperfine interactions in FINEMET
Autorzy:
Brzózka, K.
Szumiata, T.
Gawroński, M.
Górka, B.
Zorkovská, A.
Sovák, P.
Powiązania:
https://bibliotekanauki.pl/articles/147216.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Mössbauer spectroscopy
FINEMET
nanocrystalline alloys
Al-dopped FINEMET
Opis:
Structure and hyperfine interactions of amorphous and nanocrystalline FINEMET were investigated by means of Mössbauer spectrometry. It was found that substitution of x iron atoms with aluminum ones causes changes in the properties of both amorphous and nanocrystalline alloys as well as in the structure of individual phases. The reduction of hyperfine magnetic field caused by atom substitution is a non-linear function of x, unlike the linear dependence expected because of dilution. Temperature studies reveal a double magnetic phase transition at 250°C and 330°C as well as point to the variety of phases in the examined material.
Źródło:
Nukleonika; 2004, 49,suppl.3; 59-62
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical, magnetic and Mössbauer effect analysis of road dust from expressway
Autorzy:
Szumiata, T.
Gawroński, M.
Górka, B.
Brzózka, K.
Świetlik, R.
Trojanowska, M.
Strzelecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/147916.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
road dusts
environmental dusts
flame spectrometry
Mössbauer spectrometry
magnetic susceptibility
Opis:
Environmental dusts of urban and industrial origin are one of the most important factors responsible for air and soil pollution - mainly because of heavy metals content. In this work a dust collected from the acoustic barriers of E-77 expressway (Poland) has been investigated. Chemical analysis was performed by means of atomic absorption spectrometer with flame atomization (F-AAS). Fe, Al and Zn metals dominate in the investigated road dusts. Mossbauer spectra collected at room temperature enabled the identification of several iron-containing phases in the dust. Some traces of hematite and magnetite have been found as well as alfa-Fe phase in ferromagnetic state. A significant component could be interpreted as pure iron in paramagnetic state. The dominating doublet in the spectrum of high quadrupole splitting could correspond to iron carbonates. Complementary measurements of low-field AC magnetic susceptibility confirmed a different metal content in the road dust samples collected from different altitudes of acoustic barriers.
Źródło:
Nukleonika; 2013, 58, 1; 109-112
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local Structure and Magnetic Characteristics of FINEMET Alloys Substituted by Vanadium
Autorzy:
Brzózka, K.
Szumiata, T.
Gawroński, M.
Górka, B.
Sovák, P.
Pavlík, G.
Kolesár, V.
Powiązania:
https://bibliotekanauki.pl/articles/1813522.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
76.80.+y
Opis:
Amorphous and nanocrystalline FINEMET-type alloys with vanadium addition up to 7 at% were investigated by the MÖssbauer spectroscopy and magnetic methods. The outcomes evidence alterations in grain structure, although the main effect is related to the changes in intergranular phase. This induces diminution of mean hyperfine field, saturation induction and Curie temperature as well as the increase in coercivity.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 51-54
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies