Produção, caracterização e propriedades de superfície de filmes finos de Ti-Nb-Zr
Abstract
With the increasing use of implants, due to the possibility of replacing certain
parts of the human body as a means to improve health, there is a growing body
of research on biocompatible metallic alloys. One widely used alloy is Ti-6Al-4V;
however, aluminum ions can cause disturbances in the nervous system, and
vanadium ions can be cytotoxic. Due to these issues, the search for new alloys
has brought about various possibilities, such as Ti-β alloys, which exhibit
properties close to human bone and their structure can exhibit stable or
metastable phases, depending on the alloying elements, such as Nb, which has
an effect on the stability of the beta phase and mechanical strength. The
magnetron sputtering process is a widely used technique for depositing thin films,
as it offers high deposition rates, low working pressures, and control over the
surface quality of the deposited film. This study used this technique to produce
thin films of the TiNbZr alloy on AISI 316L steel for the evaluation of chemical and
microstructural properties. Three compositions (% at) were produced:
Ti66Nb21Zr13, Ti62Nb20Zr18, and Ti59Nb19Zr22. All samples exhibited the formation
of the β-Ti phase and nano-scale structures. The Ti62Nb20Zr18 and Ti59Nb19Zr22
samples showed electrochemical behavior similar to that of Grade IV Ti and hold
promise for use as coatings for 316L steel implants.
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