7th International Scientific Practical Conference "Innovative Technologies in Engineering" | |
Research of Adhesion Bonds Between Gas-Thermal Coating and Pre-Modified Base | |
Kovalevskaya, Z.^1,2,3 ; Zaitsev, K.^1 ; Klimenov, V.^1,4 | |
National Research Tomsk Polytechnic University, Lenin Av., 30, Tomsk | |
634050, Russia^1 | |
Institute of Strength Physics and Material Science SB of RAS, 2/4, Akademichesky Av., Tomsk | |
634021, Russia^2 | |
Yurga Institute of Technology, TPU Affiliate, Leningradskaya Str., 26, Yurga | |
652050, Russia^3 | |
Tomsk State University of Architecture, Building, Solyanaya Sq., 2, Tomsk | |
634003, Russia^4 | |
关键词: Detonation sprayed coating; Dislocation densities; Laser profilometry; Optical metallography; Plasma-sprayed coatings; Surface activation; Ultrasonic pretreatment; Ultrasound pre treatments; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/142/1/012087/pdf DOI : 10.1088/1757-899X/142/1/012087 |
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来源: IOP | |
【 摘 要 】
Nature of adhesive bonds between gas-thermal nickel alloy coating and carbon steel base was examined using laser profilometry, optical metallography, transmission and scanning electron microscopy. The steel surface was plastically pre-deformed by an ultrasonic tool. Proved that ultrasound pre-treatment modifies the steel surface. Increase of dislocation density and formation of sub micro-structure are base elements of surface modification. While using high-speed gas-flame, plasma and detonation modes of coatings, surface activation occurs and durable adhesion is formed. Ultrasonic pre-treatment of base material is effective when sprayed particles and base material interact through physical-chemical bond formation. Before applying high-speed gas flame and plasma sprayed coatings, authors recommend ultrasonic pretreatment, which creates periodic wavy topography with a stroke of 250 microns on the steel surface. Before applying detonation sprayed coatings, authors recommend ultrasound pretreatment that create modified surface with a uniform micro-topography.
【 预 览 】
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Research of Adhesion Bonds Between Gas-Thermal Coating and Pre-Modified Base | 1363KB | download |