The effect of nitrogen saturation on the corrosion behaviour of Ti-35Nb-7Zr-5Ta beta titanium alloy nitrided by ion implantation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00324719" target="_blank" >RIV/68407700:21220/19:00324719 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/19:00509467 RIV/60461373:22310/19:43919585

Výsledek na webu

<a href="https://doi.org/10.1016/j.surfcoat.2018.11.004" target="_blank" >https://doi.org/10.1016/j.surfcoat.2018.11.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2018.11.004" target="_blank" >10.1016/j.surfcoat.2018.11.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of nitrogen saturation on the corrosion behaviour of Ti-35Nb-7Zr-5Ta beta titanium alloy nitrided by ion implantation

Popis výsledku v původním jazyce

Corrosion behaviour of Ti-35Nb-7Zr-5Ta β titanium alloy nitrided by ion implantation was examined. Nitrogen ions were implanted with different fluences in the range from 1.10^17 to 9.10^17 cm-2 and an accelerating voltage of 90 kV. The specific effects of the nitrogen fluence on structural changes of the implantation zone showed the relationship between nitrogen concentration, nitride formation and corrosion behaviour. Nitrogen depth profiles measured by glow discharge optical emission spectroscopy showed the saturation limit approx. 60 at.% leading to the exo-diffusion of nitrogen. X-ray photoelectron spectroscopy indicated increasing formation of surface nitrides with the fluence of implanted nitrogen, up to the saturation fluence of 4 . 10^17 cm-2. Oversaturation induced a decrease in nitrogen concentration, accompanied by a reduction in the amount of surface nitrides, and accompanied by blistering. The corrosion tests in physiological saline solution show high resistance of the implanted surfaces to corrosion attack. The corrosion resistance increased with increasing fluence up to saturation fluence. Fluences higher than saturation one caused decrease of the corrosion resistance to the level of lower fluences. All nitrogen implanted surfaces showed higher resistance than non-implanted surface. The surface nitriding has no influence on the susceptibility to the localized corrosion attack. The formation of surface nitrides and their concentration, rather than the defects of an oversaturated surface, affect the corrosion behaviour.

Název v anglickém jazyce

The effect of nitrogen saturation on the corrosion behaviour of Ti-35Nb-7Zr-5Ta beta titanium alloy nitrided by ion implantation

Popis výsledku anglicky

Corrosion behaviour of Ti-35Nb-7Zr-5Ta β titanium alloy nitrided by ion implantation was examined. Nitrogen ions were implanted with different fluences in the range from 1.10^17 to 9.10^17 cm-2 and an accelerating voltage of 90 kV. The specific effects of the nitrogen fluence on structural changes of the implantation zone showed the relationship between nitrogen concentration, nitride formation and corrosion behaviour. Nitrogen depth profiles measured by glow discharge optical emission spectroscopy showed the saturation limit approx. 60 at.% leading to the exo-diffusion of nitrogen. X-ray photoelectron spectroscopy indicated increasing formation of surface nitrides with the fluence of implanted nitrogen, up to the saturation fluence of 4 . 10^17 cm-2. Oversaturation induced a decrease in nitrogen concentration, accompanied by a reduction in the amount of surface nitrides, and accompanied by blistering. The corrosion tests in physiological saline solution show high resistance of the implanted surfaces to corrosion attack. The corrosion resistance increased with increasing fluence up to saturation fluence. Fluences higher than saturation one caused decrease of the corrosion resistance to the level of lower fluences. All nitrogen implanted surfaces showed higher resistance than non-implanted surface. The surface nitriding has no influence on the susceptibility to the localized corrosion attack. The formation of surface nitrides and their concentration, rather than the defects of an oversaturated surface, affect the corrosion behaviour.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA16-22276S" target="_blank" >GA16-22276S: Dusíkem dopované titanové materiály: Studium teplotně závislé dopace v radiačně poškozené matrici</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

1879-3347

Svazek periodika

358

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

144-152

Kód UT WoS článku

000456762300017

EID výsledku v databázi Scopus

2-s2.0-85056655052