About the Synergetic Influence of Manganese and Silicon on the Oxidation Rate of Chromia Forming Nickel-Based Model Alloys at 1050 °C.
Saved in:
| Title: | About the Synergetic Influence of Manganese and Silicon on the Oxidation Rate of Chromia Forming Nickel-Based Model Alloys at 1050 °C. |
|---|---|
| Authors: | Perez, T.1 (AUTHOR), Mathieu, S.1 (AUTHOR) stephane.mathieu@univ-lorraine.fr, Parsa, Y.2 (AUTHOR), Latu-Romain, L.2 (AUTHOR), Wouters, Y.2 (AUTHOR), Vilasi, M.1 (AUTHOR) |
| Source: | Oxidation of Metals. Oct2020, Vol. 94 Issue 3/4, p235-249. 15p. |
| Subjects: | Silicomanganese, Kirkendall effect, Nickel alloys, Alloys, Lead alloys, Manganese, Iron-manganese alloys |
| Abstract: | The oxidation behavior of Si- and/or Mn-Ni-25Cr alloys at 1050 °C in air was studied to provide new insights on the effect of minor additions on chromia-scale growth. Four nickel alloys with and without Si or Mn were prepared. Thermogravimetry and post-oxidation characterizations evidenced that manganese increased, whereas silicon addition decreased chromia growth rate. On the contrary, addition of both Si and Mn to the Ni-25Cr alloy led to an unchanged oxidation rate in comparison with the unalloyed Ni-25Cr material. Oxide scales were characterized by photoelectrochemistry (PEC) to evaluate the role of the additions on the point defects nature. The n and p contributions of chromia forming in air were not changed by Si. On the opposite, Mn modified the scale conducting properties since only n contributions were observed for both chromia and Mn1+xCr2−xO4 spinel oxide with Mn-containing samples. In the latter case, the PEC contribution at ~ 3.2–3.4 eV was allocated to the signature of the Mn1+xCr2−xO4 spinel oxide. These data suggested that manganese enhances and silicon limits grain boundary diffusion in chromia scale as reactive element does. [ABSTRACT FROM AUTHOR] |
| Copyright of Oxidation of Metals is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
Be the first to leave a comment!
