GRK 2802: Spinel coatings produced via oxidation of an AISI 316L-MgO composite
Type of the data | Text | |
Type of the data | Dataset | |
Type of the data | Image | |
Total size of the dataset | 70324754 | |
Author | Mehdizadehlima, Mahnaz | |
Author | Schimpf, Christian | |
Author | Martin, Stefan | |
Author | Fabrichnaya , Olga | |
Author | Rafaja, David | |
Upload date | 2026-02-03T16:37:23Z | |
Publication date | 2026-02-03T16:37:23Z | |
Publication date | 2026-02-03 | |
Abstract of the dataset | The possibilities of producing protective spinel coatings on the surface of an AISI 316L-MgO composite via hightemperature oxidation at 800 ◦C, 900 ◦C and 1000 ◦C were explored using a combination of structure and microstructure analyses, and thermodynamic calculations. The structure and microstructure of the coatings were analyzed in situ and ex situ using high-temperature and conventional X-ray diffraction, scanning electron microscopy, electron backscatter diffraction and X-ray spectroscopy. The ex situ analyses identified the oxidation and reaction products and revealed their spatial distribution within the surface coating. The in situ analyses helped to describe the oxidation and reaction kinetics. It was found that Cr2O3, which forms on the surface of oxidized austenite grains, reacts quickly to the MgCr2O4 spinel, when it comes in contact with MgO. Longer oxidation times and higher oxidation temperatures facilitate the formation of Fe2O3 and MgFe2O4, which partially intermix with Cr2O3 and MgCr2O4. As the spinel phases are formed via interdiffusion and as their molar volume is larger than the molar volume of the original phases (MgO, Cr2O3/Fe2O3), they overgrow the surface of the MgO grains. This mechanism provides a basis for controlled growth of protective spinel coatings on the surface of the AISI 316L-MgO composites. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2020 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4 | |
Title of the dataset | GRK 2802: Spinel coatings produced via oxidation of an AISI 316L-MgO composite | |
Project abstract | The doctoral research Project P8 investigates the relationships between microstructural features, temperature-induced microstructure evolution, and electrical conductivity in multiphase composite materials processed by FAST/SPS. The project focuses on the role of diffusion processes, phase transformations, grain growth, defect evolution, and the formation of electrically conductive percolation paths, combining advanced microscopic characterization with in-situ high-temperature experiments and microstructure-based modeling. | |
Funding Acknowledgement | The dataset was generated within the framework of the Research Training Group GRK 2802 (project ID: 461482547) funded by the German Research Foundation (DFG). | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_P8_Microstructure Design Of Composite Materials By Fast/SPS |