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1
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Evaluation of Corrosion Resistance of Nanotubular Oxide Layers on the Ti13Zr13Nb Alloy in Physiological Saline Solution / Ocena Odporności Korozyjnej Nanotubularnych Struktur Tlenkowych Na Stopie Ti13Zr13Nb W Środowisku Płynów Ustrojowych”

100%
Smołka A., Dercz G., Rodak K., Łosiewicz B.
Archives of Metallurgy and Materials
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2015
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issue 4
2
Content available remote

Effect of High Energy Ball Milling on the Structure and Phase Decomposition of the Multiferroic Bi₅Ti₃FeO₁₅ Ceramics

100%
Dercz J., Zubko M., Dercz G., Matuła I.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
852-855
EN
The paper presents the results of the Bi₅Ti₃FeO₁₅ multiferroic phase stability analysis during high-energy ball milling aimed at obtaining fine dispersion ceramic powder. The X-ray diffraction and transmission electron microscopy methods were used to analyse the structure and verify the degree of crystallite dispersion. Structural data analysis was carried out using the Rietveld method. To carry out the analysis of the morphology, the scanning electron microscopy was used. The results that were obtained showed that the high energy ball milling process results in the decomposition of the initial ceramics, where finally Bi₅Ti₃FeO₁₅ and Bi are obtained. An increase in the proportion of the amorphous phase and an increase in the dispersion of the grains and crystallites of the powder that occurs with an increase in the milling time were observed.
3
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Structure Characterization of Biomedical Ti-Mo-Sn Alloy Prepared by Mechanical Alloying Method

100%
Dercz G., Matuła I., Zubko M., Liberska A.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1029-1032
EN
The study presents the results of the influence of high energy milling on the structure of the new Ti-15Mo-5Sn [wt%] alloy for biomedical applications. During testing the powders were milled for the following milling times: 5, 15, 30, and 45 h. The milled powders were characterized by X-ray diffraction, scanning and transmission electron microscopy methods. Observation of the powder morphology after various stages of milling leads to the conclusion that with the increase of the milling time the size of the powder particles as well as the degree of aggregation change. However, a clear tendency of particles reduction at every stage of the mechanical alloying process is clearly observed. The X-ray diffraction results confirmed the presence of the α and β phases, and molybdenum. It has been found that the reflections from the Sn phase disappeared after five hours of milling, suggesting that the Sn and Ti alloying took place, leading to the creation of a titanium-based solid solution. After 30 and 45 h of mechanical alloying the formation of the β-Ti phase, the final share of which is 46(4) wt%, was observed. Furthermore, it was found that a diffraction line broadening with the increase of the milling time results from reduction of the crystallite size and an increase in the lattice distortion. The maximum level of the reduction of the crystallite size was obtained after 45 h of milling. The maximum degree of the unit cells reduction for all phases present in the powder that was being milled was also observed for this milling time.
4
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Application of Mechanical Activation in Synthesizing Multiferroic Pb(Fe1/2Nb1/2)O3 Powders

100%
Dercz G., Bochenek D., Oleszak D.
Archives of Metallurgy and Materials
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2011
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issue 4
5
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Mössbauer Spectroscopy, X-Ray Diffraction and SEM Studies on Multiferroic Bi_5Ti_3FeO_{15} Ceramics

100%
Rymarczyk J., Hanc A., Dercz G., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1579-1584
EN
Magnetoelectric multiferroics are materials which exhibit both magnetic order and ferroelectricity in the same phase. Multiferroic materials, where ferroelectricity and magnetism coexist, were extensively studied. This class of materials offers a large application potential for new devices due to the two coupled degrees of freedom based on the local off-centered distortion and the electron spin. The studied Bi_5Ti_3FeO_{15} ceramics was prepared by conventional synthesis and hot uniaxial pressing reaction applying the conventional mixture of TiO_2, Fe_2O_3 and Bi_2O_3 oxides as precursor materials. The present work focuses on the structure analysis of multiferroic Bi_5Ti_3FeO_{15} ceramics performed by X-ray diffraction method, scanning electron microscopy and the Mössbauer spectroscopy methods.
6
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Processing, Microstructure and Dielectric Properties of the Bi_5Ti_3FeO_{15} Ceramic

100%
Rymarczyk J., Dercz G., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6A
A-191-A-197
EN
The aim of the present work is the analysis of microstructure, dielectric permittivity and thermal properties analysis of Bi_5Ti_3FeO_{15} ceramics obtained by two methods. The studied Bi_5Ti_3FeO_{15} ceramics were prepared by conventional synthesis and hot uniaxial pressing reaction from the conventional mixture of oxides, viz. TiO_2, Fe_2O_3, Bi_2O_3. The studied material has layered perovskite like structures, first described by Aurivillius in 1949 and Subbaro in 1969. The ceramic Bi_5Ti_3FeO_{15} is known to contain a series of compounds with the general formula: Bi_{m+1}Fe_{m-3}Ti_3O_{3m+3}. The X-ray diffraction methods were used for qualitative phase analysis of studied samples. The morphology was analyzed by scanning electron microscopy method. The thermal properties of the studied materials were measured using the differential thermal analysis at a constant heating rate of 15 K/min under an argon protective atmosphere. Thermal dependence of dielectric permittivity was studied between room temperature and 1137 K.
7
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Microstructure Evolution of TI/ZRO2 and TI/AL2O3 Composites Prepared by Powder Metallurgy Method

100%
Dercz G., Matuła I., Gurdziel W., Kuczera N.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 2
8
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The Properties of (Pb0.97Ba0.03)[(Zr0.98Ti0.02)1-zSnz]O3 Ceramics with 0 < z < 0.08

100%
Dercz G., Brzezińska D., Skulski R., Wawrzała P.
Archives of Metallurgy and Materials
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2013
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issue 4
9
Publication available in full text mode
Content available

Technology and Dielectric Properties of the KNLN Doped with Nd3+ and Pr3+ Ions

89%
Bochenek D., Osińska K., Mankiewicz M., Niemiec P., Dercz G., Bochenek D., Osińska K., Mankiewicz M., Niemiec P., Dercz G.
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vol. 65
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issue 3
10
Publication available in full text mode
Content available

The Influence of Passivation Type on Corrosion Resistance of Ti15Mo Alloy in Simulated Body Fluids / Wpływ Rodzaju Pasywacji Powierzchni Stopu Ti15Mo Na Jego Odporność Korozyjną W Środowisku Płynów Ustrojowych

88%
Dercz G., Łosiewicz B., Szklarska M., Rak J., Simka W.
Archives of Metallurgy and Materials
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2015
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issue 4
11
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Influence of High Energy Milling Time on the Ti-50Ta Biomedical Alloy Structure

88%
Matuła I., Dercz G., Zubko M., Prusik K., Pająk L.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1033-1036
EN
Nickel-free titanium alloys are a promising research direction in the field of biomedical materials. Current literature reports indicate that there is a possibility of using the Ti-Ta alloys in medicine since these alloys have had satisfactory results as far as biocompatibility, resistance to corrosion and mechanical properties are concerned, which is an important aspect while considering the use of this alloy for long-lasting bone implants. This article presents the results of a high-energy milling process with the use of Ti and Ta powders. The ball-milling process was carried out for various times, including 20, 40, 60, 80, and 100 h. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The research confirmed partial synthesis of the materials during the process of high energy ball milling.
12
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Structure and Corrosion Resistance of Nickel-Molybdenum Alloy Coatings

88%
Popczyk M., Zacharz M., Osak P., Dercz G., Łosiewicz B.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1072-1074
EN
Electrolytic Ni-Mo alloy coatings were obtained from the galvanic bath, at the temperature of T= 60°C under galvanostatic conditions using a cathodic current density of j= 80 mA cm¯². Surface morphology was studied using a scanning electron microscopy. Chemical composition of obtained coatings was determined by the energy dispersive spectroscopy. Structural studies were carried out using an X-ray diffraction method. Electrochemical corrosion resistance tests were carried out in 5% NaCl solution. It was found that X-ray diffraction investigations of all obtained coatings showed the characteristic "halo", which suggests that the obtained deposits have an amorphous structure. Chemical composition and corrosion resistance of the electrolytic Ni-Mo coatings depend on the concentration of Na₂MoO₄· 2H₂O in a galvanic bath. With the increase of the molybdenum content in the alloy coatings, their corrosion resistance increases.
13
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Electrochemical Formation of Second Generation TiO₂ Nanotubes on Ti13Nb13Zr Alloy for Biomedical Applications

88%
Stróż A., Dercz G., Chmiela B., Stróż D., Łosiewicz B.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1079-1080
EN
The aim of this study was to obtain the second generation TiO₂ nanotubes on the Ti13Nb13Zr alloy. Anodic oxidation of the alloy under study was carried out in 1 M (NH₄)₂SO₄ electrolyte under voltage-time conditions of 20 V for 120 min. The morphological parameters of the obtained nanotubes of second generation such as the length (L), internal (D_{i}) and outer (D_{o}) diameter of nanotube were determined. It was found that the anodic oxidation of the Ti13Nb13Zr alloy conducted under proposed conditions allowed to obtain the single-walled nanotubes of the following geometrical parameters: the internal diameter 61 nm, outer diameter 103 nm, and the length 3.9 μm. The total surface area of the single-walled nanotubes was equal to 4.1 μm², and the specific surface area per cm² (A_{s}) was estimated to be 15.6 cm²/cm². Formation mechanism, structure and optimal morphological parameters of the obtained single-walled nanotubes on the Ti13Nb13Zr alloy have been discussed in detail.
14
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Semi-Conducting Properties of Titanium Dioxide Layer on Surface of Ti-15Mo Implant Alloy in Biological Milieu

88%
Szklarska M., Dercz G., Kubisztal J., Balin K., Łosiewicz B.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
1085-1087
EN
The object of this work was to investigate structure, electrochemical behavior and semiconducting properties of the TiO₂ oxide layer on the Ti-15Mo implant alloy surface in normal and inflammatory conditions of physiological saline solution. X-ray photoelectron spectroscopy measurements confirm the presence of the oxide layer on the Ti-15Mo alloy surface. Electrochemical studies indicate excellent corrosion resistance of Ti-15Mo alloy in physiological saline solution. It was found that the investigated material under normal and inflammatory conditions behave like an insulator and n-type semiconductor, respectively.
15
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Content available

Phase Composition of Urban Soils by X-Ray Diffraction and Mössbauer Spectroscopy Analysis

88%
Kierlik P., Hanc-Kuczkowska A., Męczyński R., Matuła I., Dercz G.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 3
16
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Electrochemical Formation of Self-Organized Nanotubular Oxide Layers on Ti13Zr13Nb Alloy for Biomedical Applications

88%
Smołka A., Rodak K., Dercz G., Dudek K., Łosiewicz B.
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vol. 125
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issue 4
932-935
EN
In this work, the anodic formation of self-organized nanotubular oxide layers on Ti13Zr13Nb implant alloy was presented. Anodic oxidation was carried out at room temperature in [1 M] (NH_4)_2SO_4 solution with 1 wt% content of NH_4F. The voltage and time of anodization was 20 V for 120 min, respectively. Under proposed conditions, the best arrangement of nanopores was observed. The physical and chemical properties of the anodized surface of the Ti13Zr13Nb alloy were characterized using grazing incidence X-ray diffraction, scanning transmission electron microscopy, and atomic force microscopy. It was found that diameter of nanopores varied from 10 to 32 nm. Mechanism of the fabrication of the unique 3D tube-shaped nanostructure of TiO_2 on the surface of the Ti13Zr13Nb alloy by electrochemical anodization, has been discussed.
17
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Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi_5Ti_3FeO_{15} Ceramic Powders Obtained by Mechanical Synthesis

76%
Dercz G., Rymarczyk J., Hanc A., Prusik K., Babilas R., Pająk L., Ilczuk J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1623-1629
EN
In this paper the structural and Mössbauer spectral properties of multiferroic ceramic Bi_5Ti_3FeO_{15} powders prepared by high-energy ball milling of polycrystalline precursor material (mixture of Bi_2O_3, TiO_2 and Fe_2O_3 powders) are presented. Mechanical synthesis was performed by high-energy vibratory mill. The X-ray diffraction methods were applied for the structure characterization of the studied samples. The parameters of diffraction line profiles were determined by PRO-FIT Toraya procedure. The crystallite sizes and lattice distortions were analyzed using the Williamson-Hall method. Investigations of hyperfine interactions in the studied materials were carried out by the Mössbauer spectroscopy. The powder morphology was analyzed by scanning electron microscopy and transmission electron microscopy techniques. It was found that during high-energy milling phase transitions, a decrease in crystallite size and amorphization process are observed.
18
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Alginate Biopolymer Coatings Obtained by Electrophoretic Deposition on Ti15Mo Alloy

76%
Szklarska M., Dercz G., Simka W., Dudek K., Starczewska O., Łężniak M., Łosiewicz B.
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vol. 125
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issue 4
919-923
EN
In this work, the electrophoretic deposition method has been developed for the fabrication of bioactive alginate coatings on the surface of Ti15Mo implant alloy. Thin ZnO film was deposited cataphoretically as the interlayer prior to anaphoretic deposition of alginate (Alg) which was performed from aqueous solution containing 1 g dm^{- 3} of NaAlg at room temperature. The deposition voltage and time varied in the range 20-50 V and 30-120 min, respectively. The microstructure of Alg coatings was studied by scanning electron microscope, and the surface roughness was analysed using atomic force microscopy. Structure was studied by grazing incidence X-ray diffraction. Chemical composition and functional group were examined using energy dispersive spectrometry and attenuated total reflectance Fourier transform infrared spectroscopy methods, respectively. It was found that controlling the deposition conditions it is possible to obtain amorphous Alg coatings of variable thickness and porosity. Mechanism of electrophoretic deposition of bioactive Alg coatings on the Ti15Mo alloy surface was discussed.
19
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A Study of Point Defects in the B2-Phase Region of the Fe-Al System by Mössbauer Spectroscopy

76%
Hanc A., Kansy J., Dercz G., Pająk L., Oleszak D., Mrzigod J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1555-1562
EN
In this work, we employed the Mössbauer spectroscopy and X-ray powder diffraction in a study of point defect formation in intermetallic phases of the B2 structure of the Fe-Al system as a function of Al concentration. The results are compared with the concentrations of point defect determined from positron annihilation data. In the Mössbauer effect, two types of samples are investigated: Fe-Al alloys with few additives obtained by induction melting and Al-rich metallic powders produced by the self-decomposition method and intensive grinding of high energy in the electro-magneto-mechanical mill. We present the values of the ^{57}Fe isomer shift and quadrupole splitting for the components describing the point defect in the local environment of a Mössbauer nuclide. The concentration of the Fe vacancies and Fe atoms substituting Al (Fe-AS) are determined. The results showed that an increase in Al content causes an increase in vacancy and Fe-AS concentration.
20
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Microstructure Analysis of Equiatomic Multi-Component NI20TI20TA20CO20CU20 Alloy

76%
Glowka K., Zubko M., Świec P., Prusik K., Dercz G., Stróż D.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 2
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