Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 12

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

The progress of nanocrystalline hydride electrode materials

100%
Jurczyk M.
Bulletin of the Polish Academy of Sciences: Technical Sciences
|
2004
|
vol. 52
|
issue 1
2
Publication available in full text mode
Content available

Effect Of Hot Pressing On The Electrochemical Properties Of Ti-Ni Alloy

64%
Balcerzak M. B., Jurczyk M.
Archives of Metallurgy and Materials
|
2015
|
issue 2
3
Publication available in full text mode
Content available

Porous Magnesium Based Bionanocomposites For Medical Application

64%
Jurczyk M., Kowalski K.
Archives of Metallurgy and Materials
|
2015
|
issue 2
4
Content available remote

The Influence of Chemical Modification by Silver on Hydrogen Storage Properties of Nanocrystalline Ti_2Ni Alloy

64%
Balcerzak M., Jurczyk M.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 4
892-894
EN
In this study mechanical alloying process with subsequent annealing at 750°C for 0.5 h were used to produce Ti_2Ni-based nanocrystalline alloys and composite. To improve electrochemical properties, Ti-Ni-based alloy was chemically modified by 5 wt% of silver powder. X-ray diffraction analyses showed formation of nanocrystalline Ti_2Ni main phase. Electrochemical studies revealed a positive effect of chemical modification by silver on Ti_2Ni alloy. All synthesized materials were used as negative electrodes for Ni-MH_x batteries. The highest discharge capacity equaled 303 mAh/g, at 40 mA/g discharge current. All electrochemical measurements were done in 6 M KOH solution.
5
Content available remote

Electrochemical and Corrosion Behavior of Nanocrystalline TiNi-Based Alloys and Composite

64%
Balcerzak M., Jurczyk M.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 4
888-891
EN
In this work TiNi-based nanocrystalline alloys and composite were produced by mechanical alloying process with subsequent annealing at 750°C for 0.5 h. Mechanical alloying was performed in a SPEX 8000 Mixer Mill. TiNi alloy was chemically modified by Ag elemental powder. Silver content equaled 5 wt%. X-ray diffraction analyses revealed formation of TiNi main phase after annealing. Additionally, two minor phases Ti_2Ni and TiNi_3 were detected for unmodified alloy. Crystallites of obtained powders were nanosized. Corrosion and electrochemical measurements were performed in 6 M KOH solution. All synthesized materials were used as negative electrode for Ni-MH_x batteries. Ag addition positively affects on stability of discharge capacity of TiNi alloy during of charge/discharge tests.
6
Content available remote

The Electronic and Electrochemical Properties of the LaNi_5-Based Alloys

51%
Szajek A., Jezierski A., Nowak M., Jurczyk M.
Acta Physica Polonica A
|
2009
|
vol. 115
|
issue 1
247-250
EN
Mechanical alloying was used to synthesize LaNi_5-type hydrogen storage materials. X-ray diffraction analysis showed that, after 30 h milling, the starting mixture of the elements was decomposed into an amorphous phase. Following the annealing in high purity argon at 700°C for 0.5 h, X-ray diffraction confirmed the formation of the CaCu_5-type structures. The nanocrystalline materials were used as negative electrodes for a Ni-MH_x battery. A partial substitution o Ni by Al or Mn in LaNi_{5-x}M_x alloy leads to an increase in discharge capacity. On the other hand, the alloying elements such as Al, Mn and Co greatly improved the cycle life of LaNi_5 material. For example, in the nanocrystalline LaNi_{3.75}Mn_{0.75}Al_{0.25}Co_{0.25} powder, discharge capacities of up to 258 mA h g^{-1} (at 40 mA g^{-1} discharge current) were measured. The band structure ab initio calculations showed that 3g sites are preferred by Al, Co, and Mn atoms in the unit cell.
7
Content available remote

Effect of Hydrogenation on the Electronic Structure of HoNiSn - Ab Initio Calculations

51%
Jezierski A., Szajek A., Jurczyk M.
|
2010
|
vol. 118
|
issue 2
346-349
EN
The electronic and magnetic properties of HoNiSn alloy are studied by ab initio full relativistic full potential local orbital method within the local density approximation. The electronic structures are reported for two crystallographic structures: orthorhombic TiNiSi type and the hexagonal ZrNiAl-type structure. We also study the influence of hydrogenation on the electronic structure of HoNiSnH_{0.66}. Ab initio calculations have shown that in the both type of structures the Fermi level is located at the 4f peak of Ho, however we observed the modification of 3d peaks from nickel atoms below the Fermi energy. The hydrogenation leads to increase of the density of states at the Fermi level.
8
Publication available in full text mode
Content available

Mechanical and Corrosion Properties of Magnesium-Bioceramic Nanocomposites

51%
Kowalski K., Jurczyk M., Nowak M.
Archives of Metallurgy and Materials
|
2016
|
issue 3
9
Content available remote

Electronic Structure of Mg_2Ni_{1-x}Cu_{x}

51%
Jezierski A., Jurczyk M., Szajek A.
Acta Physica Polonica A
|
2009
|
vol. 115
|
issue 1
223-225
EN
Nanocrystalline Mg_{2}Ni doped alloys are good materials for hydrogen storage. In this work we present the influence of the chemical disorder on the electronic structure of Mg_{2}Ni_{1-x}Cu_{x} alloys for 0 < x < 0.2. The electronic structure was calculated by ab initio full potential scalar relativistic local-orbital method in the coherent potential approximation. We observe the change of the density of states near the Fermi energy.
10
Content available remote

Electric Conductivity of (Bi_{1-x}La_{x}FeO_{3})_{0.5}(PbTiO_{3})_{0.5} Ceramics Obtained from Mechanosynthesized Nanopowders

51%
Markiewicz E., Hilczer B., Balcerzak M., Jurczyk M.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 4
971-974
EN
Electric conductivity of (Bi_{1-x}La_{x}FeO_{3})_{0.5}(PbTiO_{3})_{0.5} ceramics obtained from nanopowders synthesized by high-energy milling from respective oxides was studied in the frequency range 10 mHz ÷ 1 GHz. At room temperatures the low-frequency conductivity was found to be dominated by the contribution from poor-conducting grain boundaries, whereas the contribution in the range 1 kHz ÷ 1 MHz, due to the grain interior, was related by us to the small polaron hopping. Moreover, the electron exchange between ferric and ferrous ions activated at higher frequencies was found to be added to the conductivity above ≈ 1 MHz.
11
Publication available in full text mode
Content available

Synthesis of Niti Based Nanocomposites Reinforced by Ha Addition

51%
Jurczyk M., Niespodziana K., Jurczyk K.
Archives of Metallurgy and Materials
|
2016
|
issue 2
12
Publication available in full text mode
Content available

The Influence of Mo Content on Phase Transformation in Ti-Mo Alloys

51%
Sochacka P., Jurczyk M., Miklaszewski A.
Archives of Metallurgy and Materials
|
2017
|
vol. 62
|
issue 4
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.