Wyniki wyszukiwania - BazTech

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Corrosion resistance characteristics of a Ti-6Al-4V ELI alloy fabricated by electron beam melting after the applied post-process treatment methods

Szymczyk-Ziółkowska Patrycja, Hoppe Viktoria, Gąsiorek Jolanta, Rusińska Małgorzata, Kęszycki Dawid, Szczepański Łukasz, Dudek-Wicher Ruth, Detyna Jerzy

Biocybernetics and Biomedical Engineering

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2021

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Vol. 41, no. 4

1575--1588

EN

Post-process modifications in the form of Hot Isostatic Pressing or surface treatment methods such as sandblasting ormachining have been widely used in the case of improving the quality of elements manufactured with the use of EBM (Electron Beam Melting). The corrosion resistance of titanium alloys for medical applications is a key and critical aspect for the use of personalized components as implants, especially when investigating the issue of additive manufacturing. This paper presents the results of research on the influence of HIP processing on the functional properties of the material produced with the use of EBM, considering the aspect of reconstructive medicine. Both the influence of surface modification and the influence of post-process treatment on microstructural, mechanical, and corrosion properties were investigated. A wide range of research has been carried out using scanning and transmission electron microscopy methods, in combination with three-point static bending tests and performing corrosion tests using potentiodynamic polarization and electrochemical spectroscopic impedance (EIS) in Hank‘s solution. The results showed that HIP treatment has a positive effect on the corrosive properties of the material in terms of increased corrosion resistance compared to materials not subjected to this type of post-process treatment. This fact is also related to the change of the alloy microstructure and the change of mechanical properties towards increased plasticity. In the case of the production of personalized implants with the use of EBM, it is worth considering the benefits of the HIP.

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Microstructure and Mechanical Properties of Amorphous Hydrogenated DLC-Coated Ti-6Al-4V ELI Alloy with TiCN Interlayer Prepared by rf-PECVD

Lee Kwangmin, Kang Seokil

Archives of Metallurgy and Materials

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2020

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Vol. 65, iss. 4

1357--1360

EN

The low adherence of diamond-like carbon (DLC) films on titanium (Ti) alloys can be improved by using interlayer coatings. In this study, DLC (a-C:H) films were deposited using radio-frequency plasma-enhanced chemical vapor deposition (rf-PECVD), and a TiCN interlayer was applied between the extra low interstitial (ELI) grade of Ti-6Al-4V alloy and a-C:H film. The characteristics of the a-C:H-coated Ti-6Al-4V ELI alloy were investigated using field emission scanning electron microscopy, Vickers hardness, and scratch and wear tests. The DLC (a-C:H) films deposited by rf-PECVD had a thickness of 1.7 μm, and the TiCN interlayer hada thickness of 1.1 μm. Vickers hardness of the DLC (a-C:H) films were increased as a result of the influence of the TiCN interlayer. The resulting friction coefficient of the a-C:H-coated Ti-6Al-4V with the TiCN interlayer had an extremely low value of 0.07.

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Porównanie własności elektrochemicznych zmodyfikowanych powierzchniowo stopów Ti-6Al-4V ELI oraz Ti-6Al-7Nb stosowanych w medycynie

Pochrząst M., Marciniak J., Basiaga M., Walke W.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 12

310-313

PL

Uzyskane wyniki badań z wykorzystaniem elektrochemicznej spektroskopii impedancyjnej stanowią próbę weryfikacji przydatności poszczególnych wariantów obróbki powierzchniowej w celu poprawy właściwości fizykochemicznych stopów Ti-6Al-4V ELI i Ti-6Al-7Nb. Przygotowanie powierzchni obejmowało zabiegi obróbki powierzchniowej składające się z szlifowania, obróbki wibracyjnej, polerowania mechanicznego, obróbki strumieniowo-ściernej, polerowania elektrochemicznego oraz anodyzacji przy potencjałach 57V, 77V, 87V oraz 97V.

EN

The obtained results with the use of electrochemical impedance spectroscopy represents an attempt to verification of the suitability of particular variants of the surface treatment in order to improve physicochemical properties of Ti-6Al-4V ELI and Ti-6Al-7Nb alloys. Preparation of surfaces procedures included of surface treatment consisting of grinding operation, shot-peening, mechanical polishing, sandblasting, electrochemical polishing and anodic oxidation at potentials 57V, 77V, 87V and 97V.

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Zastosowanie EIS do oceny własności fizykochemicznych modyfikowanego powierzchniowo stopu Ti-6Al-4V ELI

Kiel-Jamrozik M., Szewczenko J., Walke W., Marciniak J.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 12b

232-235

PL

Techniki modyfikacji powierzchni odgrywają zasadniczą rolę w kształtowaniu finalnych własności fizykochemicznych i biokompatybilności implantów ze stopów tytanowych. Jakość warstwy powierzchniowej decyduje o przenikaniu jonów metalowych do płynów ustrojowych oraz środowiska tkankowego. Celem pracy były badania nad wpływem sposobu i warunków obróbki powierzchni stopu Ti-6Al-4V ELI na własności fizykochemiczne pod kątem przydatności do zastosowań implantacyjnych.

EN

The surface modifications techniques are playing fundamental role in forming of the final physicochemical properties and biocompability of implants made of titanium alloys. The quality of surface layer is determining the influence of metallic ions to physiological solution and tissue environment. The aim of work was to study the influence of method and conditions of surface treatment of Ti-6Al-4V ELI alloy for physicochemical properties for the usefulness in implantation applications.