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1
Content available Synthesis of Ti-Nb-Zr Alloys Combined Powder Metallurgy and Arc Melting Methods
Matuła Izabela, Dercz Grzegorz, Prusik Krystian, Szklarska Magdalena, Kazek-Kęsik Alicja, Simka Wojciech, Sudoł E.
Archives of Metallurgy and Materials
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2023
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Vol. 68, iss. 3
1115--1120
EN
Scientists and medics are still searching for new metallic materials that can be used in medicine, e.g., as material for implants. The following article proposes materials based on titanium with vital elements prepared by combined powder metallurgy and arc melting methods. Four compositions of Ti-28Ta-9Nb, Ti-28Ta-19Nb, Ti-28Ta-9Zr and Ti-28Ta-19Zr (wt.%) have been prepared. The tested material was thoroughly analyzed by X-ray diffraction and scanning electron microscopy. Qualitative phase analysis using X-ray diffraction showed the presence of two phases, α' and β titanium. In addition, a microhardness test was conducted, and the material was characterized in terms of corrosion properties. It was found that the corrosion resistance decreases with an increase of the β phase presence.
2
Content available Effect of Nb and Zr alloying additives on structure and properties of Ti-Ta-Nb-Zr alloys for medical applications
Dercz Grzegorz, Matuła Izabela, Prusik Krystian, Zając J., Szklarska Magdalena, Kazek-Kęsik Alicja, Simka Wojciech
Archives of Metallurgy and Materials
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2023
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Vol. 68, iss. 3
1137--1142
EN
This work investigated two titanium-based alloys with a constant tantalum content and variable contents of alloy additives - niobium and zirconium. The Ti-30Ta-10Zr-20Nb (wt.%) and Ti-30Ta-20Zr-10Nb (wt.%) alloys were obtained using a combination of powder metallurgy and arc melting methods. The influence of alloying additives on the structure and properties of the Ti-Ta-Nb-Zr system was studied using, among others: X-ray diffraction and scanning electron microscopy. The X-ray diffraction confirmed the single-β-phase structure of both alloys. In addition, the microscopic analysis revealed that a higher amount of zirconium favoured the formation of larger grains. However, the microhardness analysis indicated that the alloy with the higher niobium content had the higher microhardness. Importantly, the in vitro corrosion study revealed that the addition of niobium promoted the better corrosion resistance of the investigated alloy.
3
Content available Effect of Milling Time on Crystallization Sequence and Microstructure of NiTi Alloys Produced Via High-Energy Ball Milling
Goryczka Tomasz, Dercz Grzegorz
Archives of Metallurgy and Materials
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2023
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Vol. 68, iss. 3
1127--1135
EN
A 20 gram batch weight of NiTi alloy, with a nominal equiatomic composition, was produced by mechanical alloying with milling times of 100, 120, and 140 hours. The differential scanning calorimetry was used to analyze the progress of the crystallization process. The X-ray diffraction examined the crystal structure of the alloy at individual crystallization stages. The observation of the powders microstructure and the chemical composition measurement were carried out using a scanning electron microscope equipped with an energy-dispersive detector. After the milling process, the alloy revealed an amorphous-nanocrystalline state. The course of the crystallization process was multi-stage and proceeded at a lower temperature than the pure amorphous state. The applied production parameters and the stage heat treatment allowed to obtain the alloy showing the reversible martensitic transformation with an enthalpy of almost 5 J/g.
4
Content available remote Electrodeposition of Zn, Cu and Cu-Zn alloy coatings from the galvanic baths based on 2-hydroxyethyl-trimethylammonium acetate
Maciej Artur, Kądziela Monika, Michalska Joanna, Dercz Grzegorz
Ochrona przed Korozją
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2019
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nr 3
112--115
EN
Results of the investigations on electrodepositon of zinc, copper and copper-zinc alloy coatings from the galvanic baths based on 2-hydroxyethyl- trimethylammonium acetate have been presented in the paper. An influence of cathodic current density on structure of the deposits (SEM) was determined. Moreover, a chemical composition (EDS) as well as a phase composition (XRD) of the obtained alloy coatings were analysed. On the basis of the realized studies it was found that the current conditions influence on grain size of zinc coatings, however in the case of Cu and Cu-Zn coatings the effect is unessential. The electrodeposited brass alloys were solid solutions of zinc in copper.
PL
W pracy przedstawiono wyniki badań nad elektroosadzaniem powłok cynkowych, miedzianych i stopowych Cu-Zn z kąpieli galwanicznych opartych na octanie 2-hydroksyetylo-(trimetylo)amoniowym. W ramach pracy określono wpływ katodowej gęstości prądu na strukturę osadzonej powłoki (SEM). Ponadto wykonano analizę składu chemicznego (EDS) oraz składu fazowego (XRD) wytworzonych powłok stopowych. Na podstawie przeprowadzonych badań stwierdzono, że warunki prądowe wpływają na rozmiar ziaren powłok cynkowych, jednakże w przypadku powłok Cu i Cu-Zn wpływ ten jest nieznaczny. Powłoki mosiężne osadzone elektrolitycznie stanowiły roztwór stały cynku w miedzi.
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