Study of the effects of plasma immersion ion implantation on austenitic stainless steel using E×B fields
| Autor: | E.J.D.M. Pillaca, Mario Ueda, Carlos Maurício Lepienski, H. Reuther |
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| Rok vydání: | 2014 |
| Předmět: |
Auger electron spectroscopy
Materials science Metallurgy Analytical chemistry chemistry.chemical_element Surfaces and Interfaces General Chemistry engineering.material Condensed Matter Physics Nitrogen Plasma-immersion ion implantation Hardness Surfaces Coatings and Films Ion chemistry.chemical_compound chemistry Phase (matter) Materials Chemistry engineering Austenitic stainless steel Chromium nitride |
| Zdroj: | Surface and Coatings Technology. 246:1-5 |
| ISSN: | 0257-8972 |
| Popis: | The effect of magnetic field enhanced plasma immersion ion implantation (PIII) on SS304 austenitic stainless steel samples has been investigated. Application of magnetic field in PIII process leads to the formation of the crossed E × B field configuration, promoting the increase of the plasma density by electron-neutrals collision. As a result, a high nitrogen ion flux on SS304 sample was achieved. In this experiment, a moderate temperature of about 350 °C was measured after two hour of treatment, discarding the possibility of the formation of chromium nitride. Measurements performed by Auger electron spectroscopy (AES) showed the formation of a nitrogen implanted layer which was much greater than the one obtained by standard PIII (at the same pulsing conditions). Due to that, new peaks in the characteristic profile of X-ray diffraction were observed as consequence of the formation of a new phase (γ N phase). It has caused as twice as high improvement in the surface hardness compared to the conventional PIII. Consequently, a substantial reduction in the wear rate was obtained. |
| Databáze: | OpenAIRE |
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