Gibbs energy calculation of electrolytic plasma channel with inclusions of copper and copper oxide with Al-base

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Posuvailo, V.M.^1 ; Klapkiv, M.D.^1 ; Student, M.M.^1 ; Sirak, Y.Y.^1 ; Pokhmurska, H.V.^2

Karpenko Physico-Mechanisal Institute of NAS of Ukraine, 5 Naukova Str., Lviv

79060, Ukraine^1

Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09125, Germany^2

关键词: Aluminothermic reduction;    Aluminum matrix;    Electrolytic plasma;    Energy calculation;    Isobaric-isothermal;    Oxidation reactions;    Oxide ceramic coating;    Plasma electrolytic oxidation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012045/pdf
DOI  :  10.1088/1757-899X/181/1/012045

来源: IOP

【 摘 要 】

The oxide ceramic coating with copper inclusions was synthesized by the method of plasma electrolytic oxidation (PEO). Calculations of the Gibbs energies of reactions between the plasma channel elements with inclusions of copper and copper oxide were carried out. Two methods of forming the oxide-ceramic coatings on aluminum base in electrolytic plasma with copper inclusions were established. The first method - consist in the introduction of copper into the aluminum matrix, the second - copper oxide. During the synthesis of oxide ceramic coatings plasma channel does not react with copper and copper oxide-ceramic included in the coating. In the second case is reduction of copper oxide in interaction with elements of the plasma channel. The content of oxide-ceramic layer was investigated by X-ray and X-ray microelement analysis. The inclusions of copper, CuAl2, Cu9Al4in the oxide-ceramic coatings were found. It was established that in the spark plasma channels alongside with the oxidation reaction occurs also the reaction aluminothermic reduction of the metal that allows us to dope the oxide-ceramic coating by metal the isobaric-isothermal potential oxidation of which is less negative than the potential of the aluminum oxide.