Plasma coating formation by the deposition of cathode material eroded through high-current pulsed discharge

• Видавець: Національний науковий центр «Харківський фізико-технічний інститут» НАН України
• Дата: 2019
• Автори: Chabak, Yu.G., Fedun, V.I., Efremenko, V.G., Pastukhova, T.V., Efremenko, B.V.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2019
• Назва видання: Вопросы атомной науки и техники
• Теми: Physics of radiotechnology and ion-plasma technologies
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/195227
• Цитувати: Plasma coating formation by the deposition of cathode material eroded through high-current pulsed discharge / Yu.G. Chabak, V.I. Fedun, V.G. Efremenko, T.V. Pastukhova, B.V. Efremenko // Problems of atomic science and technology. — 2019. — № 5. — С. 167-174. — Бібліогр.: 33 назв. — англ.

The paper analyzes the conditions for the formation of a coating obtained using an electrothermal axial plasma accelerator due to plasma transfer of cathode erosion products. It is shown that by using a cathode of low-melting materials with a high-current pulsed discharge, microdrops are formed and injected from the accelerator falling into the surface to be treated. When colliding with the surface, the drops acquire near-disk shape with a radius of up to 100 µm, cooling on the substrate at a speed of up to 10⁸ K/s. This leads to the formation in the drops of a supersaturated solid solution with nonequilibrium structure. The subsequent heat treatment of the coating can result in hardening phases precipitation from solid solution causing the increase in coating microhardness.