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1
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Porous Magnesium Based Bionanocomposites For Medical Application

100%
Jurczyk M., Kowalski K.
Archives of Metallurgy and Materials
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2015
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issue 2
2
Content available remote

Analysis of Phase Transformations in Inconel 625 Alloy during Annealing

81%
Petrzak P., Kowalski K., Blicharski M.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1041-1044
EN
The investigation focused on the characterization of the microstructure and chemical composition changes after annealing. The research was conducted on the Inconel 625 weld overlay deposited on a boiler steel. The annealing was performed for 10 h at temperatures from 600 to 1000°C. The microstructure and chemical composition were examined by scanning electron microscope and transmission electron microscope equipped with an energy dispersive X-ray spectrometer. Weld overlays were produced by an innovative method of cold metal transfer.
3
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Mechanical and Corrosion Properties of Magnesium-Bioceramic Nanocomposites

81%
Kowalski K., Jurczyk M., Nowak M.
Archives of Metallurgy and Materials
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2016
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issue 3
4
Content available remote

Load compensatory response of external intercostal muscles during assisted ventilation in rabbits

81%
Romaniuk J. R., Celichowski J., Kowalski K.
Acta Neurobiologiae Experimentalis
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1993
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vol. 53
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issue 4
557-561
5
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Structural Characterization of La_{1-x}Sr_xCoO₃ Thin Films Deposited by Pulsed Electron Deposition Method

71%
Cieniek Ł., Kopia A., Cyza A., Kowalski K., Kusiński J.
|
EN
The aim of the presented research was to investigate the influence of strontium dopant on the structure and composition of La_{1-x}Sr_{x}CoO₃ (x=0, 0.1, 0.2) perovskite thin films. Pure and Sr doped LaCoO₃ thin films were grown by pulsed electron deposition technique on crystalline epi-polished Si/MgO substrates. Numerous analytical techniques (scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction) were applied to characterize their phase/chemical composition, structure and surface morphology. X-ray diffraction analysis showed the presence of pure LaCoO₃ perovskite phase in the undoped thin film. For Sr doped thin films La_{0.8}Sr_{0.2}CoO₃ (x=0.2), La_{0.9}Sr_{0.1}CoO₃ (x=0.1) small contents of La₂ O₃ and LaSrCoO₄ phases were noticed. The crystallite sizes, calculated from the Williamson-Hall plots, were about 18 nm for all analyzed films. According to scanning electron microscopy/atomic force microscopy observations, obtained thin films were free from defects and cracks. Atomic force microscopy (tapping mode) analysis revealed the differences in the shape and quantity of surface crystallites for all thin films as a result of Sr doping and different deposition parameters. Atomic force microscopy technique also allowed measurement of roughness parameters for analyzed samples. X-ray photoelectron spectroscopy analyses of chemical states of elements of thin films showed that their chemical state was stable across the film thickness and even at the interface with the MgO substrate. X-ray photoelectron spectroscopy analysis also allowed to evaluate chemical states and atomic concentration of La, Co, and Sr elements within cross-sections of deposited thin films.
6
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Microstructure and Properties of TiC/Ti Coatings Deposited by the Supersonic Cold Gas Spray Technique

61%
Kusiński J., Kac S., Kowalski K., Dosta S., Georgiou E. P., Garcia-Forgas J., Matteazzi P.
Archives of Metallurgy and Materials
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2018
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vol. 63
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issue 2
7
Content available remote

Cross Sections for l-Mixing of K(n^{2}F) States in Collisions with Ground-State K(4^{2}S) Atoms

61%
Głódź M., Huzandrov A., Klavins J., Sydoryk I., Szonert J., Gateva-Kostova S., Kowalski K.
Acta Physica Polonica A
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2000
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vol. 98
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issue 4
353-361
EN
We report measurements of the cross sections σ_{l-mix} for angular momentum mixing of the K(n^{2}F)(n=6, 7, 8) states with the K(n,l > 3) states, induced in thermal collisions with parent ground state K(4^{2}S) atoms. The experiment was performed in a cell heated to ca. 450K. The n^{2}F states were excited in two steps: 4^{2}S → 4^{2}P → n^{2F} by using a diode laser for the first step (a dipole-transition) and a pulsed dye laser for the second step (a quadrupole-transition). The measured values σ_{l-mix} (6^{2}F)=3.6+-2.2, σ_{l-mix} (7^{2}F)=4.2+-2.6 and σ_{l-mix} (8^{2}F)=8.0+-4.6 (in units of 10^{-13}cm^{-1}) are close to the corresponding values of the geometrical cross sections.
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