Nonvacuum Surfacing of Protective Coatings Using a Low-Energy Electron Beam.

Authors :: Kornilov, S. Yu.
Rempe, N. G.
Smirnyagina, N. N.
Source :: Inorganic Materials: Applied Research; May2018, Vol. 9 Issue 3, p464-471, 8p
Publication Year :: 2018
Abstract: The results of electron-beam surfacing in air of protective coatings by a low-energy (120 keV) electron beam produced by an electron gun with a plasma emitter are presented. The gun is mounted on an industrial robotic manipulator KUKA, which allows the electron beam to be moved to the atmosphere along a given path without electromagnetic sweep. The combined (self-propagating high-temperature synthesis and electron-beam surfacing) method for obtaining coatings from reaction mixtures of TiO<subscript>2</subscript>: 2.1C and TiO<subscript>2</subscript>: 0.3Cr<subscript>2</subscript>O<subscript>3</subscript>: 3.3С is implemented using this setup. The optimum composition of the reaction mixtures and the deposition regimes are determined by thermodynamic modeling using the TERRA program. The obtained coatings with a thickness of 120-200 μm have a microhardness of 12 GPa. The coatings and the transition layer are established to have good heat resistance up to 900°C. Noticeable changes in the weight characteristics of coatings occur at above 1000°C. [ABSTRACT FROM AUTHOR]