Creation of heterogeneous materials on the basis of B4C and Ni powders by the method of cold spraying with subsequent layer-by-layer laser treatment

• Published in: Journal of applied mechanics and technical physics Vol. 58; no. 5; pp. 947 - 955
• Main Authors: Fomin, V. M., Golyshev, A. A., Kosarev, V. F., Malikov, A. G., Orishich, A. M., Ryashin, N. S., Filippov, A. A., Shikalov, V. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-09-2017; Springer Nature B.V
• Subjects: Applications of Mathematics; Ceramic powders; Classical and Continuum Physics; Classical Mechanics; Cold spraying; Fluid- and Aerodynamics; Functionally gradient materials; Laser beams; Lasers; Mathematical Modeling and Industrial Mathematics; Mechanical Engineering; Mechanical properties; Microhardness; Nickel; Physics; Physics and Astronomy; nickel; coating; microstructure; morphology; cold spraying; roughness; laser action; boron carbide
• ISSN: 0021-8944; 1573-8620
• DOI: 10.1134/S0021894417050224

A method is proposed for creating principally new functionally graded heterogeneous materials on the basis of B
4
C ceramic powders with different mass fractions in the original mixture and plastic metallic additive of Ni by a combined method of cold spraying with subsequent layer-by-layer laser treatment. Mechanical properties of the resultant tracks are examined. It is shown that the track microhardness increases with increasing B
4
C concentration in the original mixture. The track structure is found to depend on the size of ceramic particles in the interval from 3 to 75
μ
m. Reduction of the B
4
C particle size (approximately by a factor of 2–3) inside the track owing to fragmentation under the action of the laser beam is observed for the first time.