We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Corrosion behavior of tantalum alloying on γ-TiAl by double-glow plasma surface metallurgy technique.
- Authors
Liu, Y. C.; Zhang, P. Z.; Wei, D. B.; Wei, X. F.; Chen, X. H.; Ding, F.
- Abstract
The Ta coating with corrosion resistance is grown on the γ-TiAl substrate by double-glow plasma surface metallurgy technique, followed by the electrochemical test in 10 wt%, 20 wt% HCl and 10 wt%, 40 wt% H2SO4 solution. The data of nanohardness and elastic modulus are collected by the nanoindention test. The adhesion strength of Ta coating is investigated by means of the scratch test. The study of corrosion resistance is performed using potentiodynamic polarization and electrochemical impedance spectroscopy and measured by SEM and X-ray diffraction. Results highlight that the Ta coating is tightly bonded to the γ-TiAl substrate, consisting of the deposition layer and diffusion layer. Experimental data indicate that the Ta coating presents excellent corrosion resistance, which is confirmed by the high values of polarization resistance ( Rp) and the low values of corrosion current density ( icorr). The surface nanohardness of the Ta coating is improved from 3.41 to 7.29 GPa, nearly twice of that of the substrate. The Ta2O5 formed on the coating is able to hold back the penetration of adverse ions inwardly, owing to its dense structure and adhesion effect. Copyright © 2017 John Wiley & Sons, Ltd.
- Subjects
TANTALUM alloys; ALLOYS; CORROSION resistant materials; METAL coating; TITANIUM-aluminum alloys; PLASMA gases; ELASTIC modulus
- Publication
Surface & Interface Analysis: SIA, 2017, Vol 49, Issue 7, p674
- ISSN
0142-2421
- Publication type
Article
- DOI
10.1002/sia.6207