| Autor: |
Uglov, V. V., Anishchik, V. M., Cherenda, N. N., Stalmashonak, A. K., Astashinski, V. M., Kuzmickii, A. M., Punko, A. V. |
| Předmět: |
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| Zdroj: |
High Temperature Material Process: An International Journal; 2004, Vol. 8 Issue 4, p605-615, 11p, 1 Black and White Photograph, 3 Graphs |
| Abstrakt: |
The influence of compressive plasma flow (CPF) treatment on the structure and mechanical properties of titanium-on-steel system is studied. The modification is due to the melting of the material by a nitrogen plasma flow with an energy density ∼ 1,3⋅109 W/m² and pulse duration ∼100 µs and the subsequent fast resolidification accompanied by fast diffusion of coating components into the substrate. The structural-phase state and element structure are analyzed by X-Ray diffraction method (XRD) and scanning electron microscopy (SEM). As a result of the treatment, the formation of iron-titanium solid solution and titanium nitride is observed in the modified layer ∼15 µm in thickness. Phase and structural changes result in the increase in microhardness of the treated system two times more as the microhardness of the initial state of carbon steel used as a base material. The model of impurity diffusion in terms of temperature and pressure gradients which takes into account the acceleration of diffusion transport due to liquid phase formation during the melting is suggested. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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