Corrosion and tribocorrosion behaviour of titanium nitride thin films grown on titanium under different deposition times

SURFACE & COATINGS TECHNOLOGY

卷:374

Article

Caha, I.¹  Alves, A. C.¹  Affonco, L. J.^2,3  Lisboa-Filho, P. N.^2,3  da Silva, J. H. D.^2,3  Rocha, L. A.^1,2,3  Pinto, A. M. P.^1,4  Toptan, F.^1,2,4 

[1] Univ Minho, CMEMS Uminho Ctr MicroElectroMech Syst, P-4800058 Azurem, Guimaraes, Portugal

[2] IBTN Br Brazilan Branch Inst Biomat Tribocorros &, Bauru, SP, Brazil

[3] UNESP Univ Estadual Paulista, Fac Ciencias Bauru, Dept Fis, BR-17033360 Bauru, SP, Brazil

[4] Univ Minho, Dept Eng Mecan, P-4800058 Azurem, Guimaraes, Portugal

关键词: TiN;    Corrosion;    Tribocorrosion;   

DOI  :  10.1016/j.surfcoat.2019.06.073

来源: Elsevier

【 摘 要 】

Ti and its alloys exhibit combination of unique properties for biomedical applications, however their poor tribo-electrochemical behaviour is a major concern. Therefore, TiN coatings were deposited on cp-Ti (grade 4) by sputtering technique aiming the improvement of its tribocorrosion behaviour. The properties of the coated samples, using different TiN deposition times, were characterized by using grazing incidence X-ray diffraction, FIB-SEM, and nanoindentation. The corrosion behaviour was studied by electrochemical impedance spectroscopy and potentiodynamic polarization in 9 g/L NaCl solution at body temperature. Tribocorrosion tests were employed under open circuit potential by using a ball-on-plate tribometer with 1 N normal load, 3 mm total stroke length, 1 Hz frequency, and 1800 s sliding duration. The results suggested that the TiN coatings deposited during 80 min presented better corrosion and tribocorrosion behaviour as compared to the bare metal and TiN coatings deposited during 30 min.

【 授权许可】

Free