Journal
ELECTROCHIMICA ACTA
Volume 423, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2022.140497
Keywords
Tantalum; Tantalum oxide; HiPIMS; DOMS mode; Polarization resistance
Categories
Funding
- FEDER funds through the program COMPETE - Programa Operacional Factores de Competitividade
- national funds through FCT - Fundacao para a Ciencia e a Tecnologia [UIDB/00285/2020]
- CoatNoVirus - Centro 2020 [69996]
- [HEALTHYDENT-POCI-01-0145-FEDER-030708]
Ask authors/readers for more resources
The HiPIMS technique in DOMS mode was used to deposit tantalum (Ta) and Ta1-xOx films. After depositing pure metallic Ta and Ta1-xOx films with two different thicknesses, their structure, morphology and chemical composition were investigated. The study showed that increasing film thickness affects the mechanical and electrochemical properties of metallic coatings, while tantalum oxide films enhance the polarization resistance of non-reactive coatings.
The HiPIMS technique in DOMS mode was used to deposit tantalum (Ta) and Ta1-xOx films. After depositing pure metallic Ta and Ta1-xOx films with two different thicknesses, their structure, morphology and chemical composition were investigated. Nano-indentation was used to evaluate the hardness of the films. OCP, potentiodynamic and EIS in artificial saliva at T = 37 degrees C were used to investigate the corrosion behaviour of the coatings. The results showed that, in the case of metallic coatings, increasing the film thickness, the beta-phase becomes dominant over the alpha-phase, which compromised both the mechanical and electrochemical behaviours. Tantalum oxide films raised the polarisation resistance of the non-reactive coatings (metallic ones), exhibiting values 2-3 orders of magnitude higher.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available