Research of Adhesion Bonds Between Gas-Thermal Coating and Pre-Modified Base

7th International Scientific Practical Conference "Innovative Technologies in Engineering"

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

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.