Anodic Plasma Electrolytic Nitrocarburizing of VT22 Titanium Alloy in Carbamide Electrolyte
| Autor: | Pavel N. Belkin, S. A. Silkin, S. A. Kusmanov, S. S. Korableva, I. V. Tambovskiy |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Oxide Titanium alloy chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Indentation hardness 0104 chemical sciences Surfaces Coatings and Films Diffusion layer chemistry.chemical_compound chemistry Rutile Surface roughness 0210 nano-technology Nuclear chemistry Titanium |
| Zdroj: | Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. 12:507-512 |
| ISSN: | 1819-7094 1027-4510 |
| DOI: | 10.1134/s1027451018030060 |
| Popis: | The influence of the carbamide concentration on the nitrocarburizing temperature and changes in the mass of titanium samples, which are related to the anodic dissolution and high-temperature oxidation of titanium in a vapor‒gas shell, is investigated. The modified layer structure is revealed to contain an external oxide layer (rutile) and an intermediate diffusion layer whose microhardness reaches 770 HV. It is demonstrated that an increase in the nitrocarburizing temperature stimulates growth in the oxide-layer thickness, and the diffusion-layer thickness depends on the carbamide concentration in the solution. It is found that, at 850°С, the surface roughness decreases from 1.0 to 0.3–0.5 μm and the wear rate reduces from 6.7 × 10–7 to (1.2–1.7) × 10–7 due to nitrocarburizing in an electrolyte incorporating 10–15 wt % ammonium chloride and 10–12.5 wt % carbamide. |
| Databáze: | OpenAIRE |
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