Abstract

The results of studies of the influence of the electrophysical characteristics of a heterogeneous plasma flow on the properties of Al2O3 coatings (phase composition, adhesion, porosity) during plasma arc thermal spraying on a steel grade 20 in dynamic vacuum, in the pressure range from 7 to 50 kPa and at 100 kPa are presented. As well as the results for different plasma thermal spraying modes (power, consumption rate of plasma-forming gas and powder, pressure in the chamber). For the plasma torch design in this work, it was shown that Al2O3 particles are deposited most efficiently when their size is up to 100 μm, with an arc current of 300 A, flow rates for powder 0.1 g/s and for plasma-forming gas of up to 1 g/s in the pressure range (2.0-3.0) • 104 Pa.

Details

Title
Properties of Al2O3 coatings obtained by electric arc plasma method in “dynamic vacuum”
Author
Mordynsky, A V 1 ; M Kh Gadzhiev 1 ; Tyuftyaev, A S 1 ; Gusev, V M 2 ; Borodina, T I 1 

 Joint Institute For High Temperatures RAS 
 FSBEI HE “National University of Oil and Gas (Gubkin University 
Publication year
2020
Publication date
Jul 2020
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2570508213
Copyright
© 2020. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.