Structure and microhardness of the plasma sprayed composite coatings after combined treatment

3rd International Youth Scientific Forum with International Participation "New Materials"

Ivannikov, A.Yu^1 ; Kalita, V.I.^1 ; Komlev, D.I.^1 ; Radyuk, A.A.^1 ; Bagmutov, V.P.^2 ; Zakharov, I.N.^2 ; Parshev, S.N.^2 ; Denisevich, D.S.^2

Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, 49, Leninsky av., Moscow

119334, Russia^1

Department of Resistance of Materials, Volgograd State Technical University, 28, Lenin ave., Volgograd

400005, Russia^2

关键词: Air plasma sprayed;    Coating structures;    Combined treatment;    Electromechanical treatment;    Fundamental changes;    Plasma-sprayed coatings;    Surface microhardness;    Ultrasonic treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/347/1/012001/pdf
DOI  :  10.1088/1757-899X/347/1/012001

来源: IOP

【 摘 要 】

The principal aim of this study was to evaluate the effect of combination of electromechanical treatment (EMT) and ultrasonic treatment on structure and microhardness of air plasma sprayed composite coatings from Ni-20Cr alloy and R6M5 high speed steel (HSS). The results of the microstructural studies showed fundamental changes of the treated by the EMT plasma sprayed coating with the formation of nanostructured crystalline phases. As a consequence of the coating thus formed, the number of pores in the coating structure reduced from 10.0±1.5% to 2.0±0.5%, the surface microhardness increased from 3100±500 MPa to 7900±400 MPa. Additional ultrasonic treatment on the selected mode decreased surface waviness, which was formed on the surface of the plasma sprayed composite coatings after the EMT. The obtained results revealed the high potential of the combined treatment for post-treatment of the plasma sprayed coatings.