Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes
The low temperature plasma of glow discharge has found a widespread use as a heating source in welding and surface treatment of metals. The meticulous analysis of glow discharge’s instabilities in these processes allowed us to highlight the physicochemical characteristics of the cathode surface (the...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/4/1765 |
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| author | Maksym Bolotov Gennady Bolotov Serhii Stepenko Pavlo Ihnatenko |
| author_facet | Maksym Bolotov Gennady Bolotov Serhii Stepenko Pavlo Ihnatenko |
| author_sort | Maksym Bolotov |
| collection | DOAJ |
| description | The low temperature plasma of glow discharge has found a widespread use as a heating source in welding and surface treatment of metals. The meticulous analysis of glow discharge’s instabilities in these processes allowed us to highlight the physicochemical characteristics of the cathode surface (the welded or treated samples) as one of the main reasons of its transition into an electric arc—as a more stable form of gas discharges. The prolonged arc action on the samples surfaces inevitably leads to the disruption of the technological process and, consequently, to undesirable overheating of samples. In this regard, the main aim of this work is to study the influence of the macro- and micro relief of the cathode on the stable glow discharge existence in the processes of metals treatment and diffusion welding. It has been analytically established and experimentally supported that the glow discharge’s stability is mainly affected by the sharp protrusions generated on the cathode surface because of samples pre-treatment by machining before welding. It has been established that the rough surface pre-treatment with the Rz about 60–80 µm decreases the pressure range of glow discharge sustainable existence from 1.33–13.3 kPa to 1.33–5.3 kPa compared with the surface machining with the Rz about 10 µm. |
| first_indexed | 2024-03-09T00:49:17Z |
| format | Article |
| id | doaj.art-2093a3207ce04b40a62bda1f1007997a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T00:49:17Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-2093a3207ce04b40a62bda1f1007997a2023-12-11T17:19:20ZengMDPI AGApplied Sciences2076-34172021-02-01114176510.3390/app11041765Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding ProcessesMaksym Bolotov0Gennady Bolotov1Serhii Stepenko2Pavlo Ihnatenko3Department of Welding Technologies and Construction, Chernihiv Polytechnic National University, 95 Shevchenko Str., 14035 Chernihiv, UkraineDepartment of Welding Technologies and Construction, Chernihiv Polytechnic National University, 95 Shevchenko Str., 14035 Chernihiv, UkraineDepartment of Electrical Engineering and Information Measuring Technologies, Chernihiv Polytechnic National University, 95 Shevchenko Str., 14035 Chernihiv, UkraineDepartment of Machine Building and Wood Processing Technologies, Chernihiv Polytechnic National University, 95 Shevchenko Str., 14035 Chernihiv, UkraineThe low temperature plasma of glow discharge has found a widespread use as a heating source in welding and surface treatment of metals. The meticulous analysis of glow discharge’s instabilities in these processes allowed us to highlight the physicochemical characteristics of the cathode surface (the welded or treated samples) as one of the main reasons of its transition into an electric arc—as a more stable form of gas discharges. The prolonged arc action on the samples surfaces inevitably leads to the disruption of the technological process and, consequently, to undesirable overheating of samples. In this regard, the main aim of this work is to study the influence of the macro- and micro relief of the cathode on the stable glow discharge existence in the processes of metals treatment and diffusion welding. It has been analytically established and experimentally supported that the glow discharge’s stability is mainly affected by the sharp protrusions generated on the cathode surface because of samples pre-treatment by machining before welding. It has been established that the rough surface pre-treatment with the Rz about 60–80 µm decreases the pressure range of glow discharge sustainable existence from 1.33–13.3 kPa to 1.33–5.3 kPa compared with the surface machining with the Rz about 10 µm.https://www.mdpi.com/2076-3417/11/4/1765diffusion weldingplasmaglow dischargesurface treatmentplasma techniques |
| spellingShingle | Maksym Bolotov Gennady Bolotov Serhii Stepenko Pavlo Ihnatenko Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes Applied Sciences diffusion welding plasma glow discharge surface treatment plasma techniques |
| title | Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes |
| title_full | Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes |
| title_fullStr | Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes |
| title_full_unstemmed | Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes |
| title_short | Impact of the Samples’ Surface State on the Glow Discharge Stability in the Metals’ Treatment and Welding Processes |
| title_sort | impact of the samples surface state on the glow discharge stability in the metals treatment and welding processes |
| topic | diffusion welding plasma glow discharge surface treatment plasma techniques |
| url | https://www.mdpi.com/2076-3417/11/4/1765 |
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