Fine Structure Study of the Plasma Coatings B4C-Ni-P

International Conference "Modern Technologies and Materials of New Generations"

Kornienko, E.E.^1 ; Bezrukova, V.A.^1 ; Kuz'Min, V.I.^2 ; Lozhkin, V.S.^1 ; Tutunkova, M.K.^1

Department of Material Science in Mechanical Engineering, Novosibirsk State Technical University, Prospekt K. Marksa, 20, Novosibirsk

630073, Russia^1

Laboratory of Physics of Plasma Arc and Laser Processes, Institute of Theoretical and Applied Mechanics SB RAS, Institutskaya str., 4/1, Novosibirsk

630090, Russia^2

关键词: Air plasma spraying;    Annular injection;    Carbide particles;    Columnar crystals;    Crystalline structure;    Nano-crystalline structures;    Scanning electrons;    Thin interlayers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/286/1/012006/pdf
DOI  :  10.1088/1757-899X/286/1/012006

来源: IOP

【 摘 要 】

The article considers structure of coatings formed of the B4C-Ni-P powder. The coatings were deposited using air-plasma spraying with the unit for annular injection of powder. The pipes from steel 20 (0.2 % C) were used as a substrate. The structure and phase composition of the coatings were studied by optical microscopy, scanning electron microscopy, transmission electron microscopy and X-ray diffractometry. It is shown that high-density composite coatings consisting of boron carbide particles distributed in the nickel boride metal matrix are formed using air-plasma spraying. The areas with round inclusions characterized by the increased amount of nickel, phosphorus and boron are located around the boron carbide particles. Boron oxides and nickel oxides are also present in the coatings. Thin interlayers with amorphous-crystalline structure are formed around the boron carbide particles. The thickness of these interlayers does not exceed 1 μm. The metal matrix material represents areas with nanocrystalline structure and columnar crystals.