Fabrication and Characterisation of Porous Coatings Enriched with Copper on CP Titanium Grade 2 under Plasma Electrolytic Oxidation

Tehnički Vjesnik

Steinar Raaen¹  Krzysztof Rokosz²  Tadeusz Hryniewicz²  Łukasz Dudek²  Patrick Chapon³  Sofia Gaiaschi³  Winfried Malorny⁴ 

[1] Department of Physics, Norwegian University of Science and Technology (NTNU), Realfagbygget E3-124 Høgskoleringen 5, NO 7491 Trondheim;Division of BioEngineering and Surface Electrochemistry, Koszalin University of Technology, Racławicka 15-17, 75-620 Koszalin, Poland;HORIBA Jobin Yvon S.A.S., 16-18, rue du Canal– 91165 Longjumeau cedex, France;Hochschule Wismar-University of Applied Sciences Technology, Business and Design, Faculty of Engineering, DE 23966 Wismar, Germany;

关键词: copper(II) nitrate(V) trihydrate;    GDOES depth profiles and derivatives;    Plasma Electrolytic Oxidation (PEO);    SEM/EDS;    three-layer model;    titanium;   

DOI  :  

来源: DOAJ

【 摘 要 】

In the present paper, coatings obtained on CP Titanium Grade 2 samples by Plasma Electrolytic Oxidation (PEO) in electrolyte containing concentrated phosphoric acid H3PO4 with copper nitrate Cu(NO3)2∙3H2O, are studied with Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS), X-Ray Photoelectron Spectroscopy (XPS) and Glow Discharge Optical Emission Spectroscopy (GDOES). A three-layer model is proposed on the basis of GDOES depth profile signals and their first and second derivatives. It was found that the time of Plasma Electrolytic Oxidation process has an influence on the chemical composition and the thickness of the obtained porous coatings. The longer time the PEO treatment is applied, the thinner porous coatings are obtained and the lowest amounts of copper, phosphorus and oxygen inside them are found. The proposed model of PEO coatings consists of three layers, i.e. the top one "A", having a thickness corresponding to the sputtering time in GDOES of about 100 s; the operating conditions applied provide very porous and contaminated by organic substances layer down to about 50 s by sputtering time; the semi-porous sub-layer named "B" has a thickness that depends on the PEO treatment time. The sub-layer "B" of PEO coating is the thickest after one-minute PEO treatment and it decreases with increasing the treatment time. The PEO coating thickness also decreases after each successive PEO processing. The last layer (from the top surface), is the transition sub-layer named "C", and it has a thickness corresponding to a sputtering time equaling 450 s.

【 授权许可】

Unknown