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

被引:2
|
作者
Kornilov S.Y. [1 ]
Rempe N.G. [1 ]
Smirnyagina N.N. [2 ]
机构
[1] Tomsk State University of Control Systems and Radioelectronics, Tomsk
[2] Institute of Physical Materials Science, Siberian Branch, Russian Academy of Sciences, Ulan-Ude
关键词
carbide coatings; differential pumping system; electron beam; electron beam surfacing at atmospheric pressure; electron gun; gas discharge; microhardness; plasma emitter; selfpropagating high-temperature synthesis (SHS);
D O I
10.1134/S2075113318030176
中图分类号
学科分类号
摘要
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 TiO2: 2.1C and TiO2: 0.3Cr2O3: 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. © 2018, Pleiades Publishing, Ltd.
引用
收藏
页码:464 / 471
页数:7
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