SEM AND EDS ANALYSIS OF NIOBIUM SURFACE AFTER PLASMA ELECTROLYTIC OXIDATION IN CONCETRATED PHOSPHORIC ACID WITHIN COPPER NITRATE

1 ROKOSZ Krzysztof
Co-authors:
1 HRYNIEWICZ Tadeusz 2 MATÝSEK Dalibor 1,3 DUDEK Łukasz 3,4,5 VALÍČEK Jan 4 HARNIČÁROVÁ Marta 4,5 KUŠNEROVÁ Milena 6 ZSCHOMMLER SANDIM Hugo Ricardo
Institutions:
1 Koszalin University of Technology, Faculty of Mechanical Engineering, Koszalin, Poland, EU, krzysztof.rokosz@tu.koszalin.pl, tadeusz.hryniewicz@tu.koszalin.pl, lukasz.dudek@tu.koszalin.pl
2 Institute of Geological Engineering, Faculty of Mining and Geology, VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, dalibor.matysek@vsb.cz
3 ICT, Faculty of Mining and Geology, VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, jan.valicek@vsb.cz
4 Institute of Physics, Faculty of Mining and Geology, VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, marta.harnicarova@vsb.cz
5 RMTVC, Faculty of Metallurgy and Materials Engineering, VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, milena.kusnerova@vsb.cz
6 Departamento de Engenharia de Materiais, Escola de Engenharia de Lorena, Polo Urbo-Industrial, Universidade de Saõ Paulo, Gleba AI-6, Lorena, SP, Brazil, hsandim@demar.eel.usp.br
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1157-1162
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
59 views / 14 downloads
Abstract

In the present paper, new coatings enriched in copper ions obtained on niobium by Plasma Electrolytic Oxidation in electrolyte containing concentrated phosphoric acid H3PO4 with copper nitrate Cu(NO3)2, are presented. It has been shown that it is possible to obtain the coatings with copper ions inside during the PEO treatment. The highest copper amount (4.05 wt. % | 1.75 at. %) was detected after oxidation at 450 V in electrolyte containing 300 g Cu(NO3)2, while the lowest copper amount (1.95 wt. % | 0.97 at. %) was detected after oxidation at 180 V in electrolyte containing 150 g Cu(NO3)2. The highest copper to phosphorus ratio (0.23 wt. % | 0.11 at. %) was detected after oxidation at 450 V in both electrolytes, i.e. that containing 150 g as well as 300 g Cu(NO3)2 in 500 ml H3PO4.The lowest copper to phosphorus ratio (0.15-0.17 wt. % | 0.07-0.09 at. %) was detected after oxidation at 180 V in both electrolytes, i.e. that containing 150 g as well as 300 g Cu(NO3)2 in 500 ml H3PO4. In addition, it was found that the higher the PEO potential used (here 450 V), the higher copper to phosphorus ratio gained.

Keywords: Niobium, Plasma Electrolytic Oxidation, Cu(NO3)2

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