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Influence of Sterilization and Exposure to the Ringer's Solution on Mechanical and Physicochemical Properties of Nitrocarburized 316 LVM Steel

Kajzer A., Rabij K., Basiaga M., Nowińska K., Kaczmarek M., Borowski T., Wierzchoń T.

Archives of Metallurgy and Materials

2018

Vol. 63, iss. 3

1257--1266

Studies on biocompatibility of AISI 316LVM steel indicate the need to eliminate the nickel from the surface and replace it with other elements of improved biocompatibility. Therefore, in the presented work selected physicochemical and mechanical properties of the diffusive nitrocarburized layer formed by plasma potential by means of an active screen made of the Fe-Cr-Ni were studied. In the paper we present results of microstructure and phase composition of the layers, roughness, and surface wettability, potentiodynamic pitting corrosion resistance, penetration of ions into the solution as well as mechanical properties. The studies were conducted for the samples of both mechanically polished and nitrocarburized surfaces, after sterilization, and exposure to the Ringer’s solution. Deposition of the nitrocarburized layer increased the contact angle, surface roughness, surface hardness, and corrosion resistance with respect to the polished surfaces. The nitrocarburized layer is a barrier against the ions release into the solution and sterilization and exposure to Ringer solution. The obtained results showed beneficial increase of both mechanical and electrochemical properties of the deposited layer, and thus the applicability of the proposed method of surface treatment of the 316 LVM steel for short-term implants after sterylization.

Badanie własności mechanicznych bydlęcych kości udowych

Rabij K., Kajzer A., Kajzer W.

Aktualne Problemy Biomechaniki

2015

z. 9

105--110

Celem badania było określenie własności mechanicznych bydlęcych kości udowych w różnym stanie uwodnienia i wysuszenia. Wartości te są niezbędne do numerycznych i eksperymentalnych analiz układu kość-implant, prowadzonych podczas projektowania nowych rozwiązań konstrukcyjnych. Dla celów pracy przeprowadzono statyczną próbę zginania i pomiary twardości oraz prowadzono obserwacje makroskopowe obszarów pęknięcia próbek.

The aim of this study was to determine the mechanical properties of bovine femur. Those values are necessary for numerical and experimental analyses of the bone-implant system, conducted during designing new structural solutions for this system. For the purpose of work the static bending test and hardness measurement were performed.