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Analysis of Oxides Formed on the Surface of the Alloy 690 in Hydrogenated Supercritical Water
- Source :
- Acta Metallurgica Sinica (English Letters). 29:774-781
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- The oxides formed on the surface of the alloy 690 in hydrogenated supercritical water at 400 °C for 1000 h were investigated using scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. The oxides on the surface of the alloy 690 exhibited multi-layer structure: an outer layer consisted of granular crystallites (NiO and NiFe2O4) and a compact inner layer (spinel and Cr2O3). Chemical analysis indicated that the outer layer was enriched in nickel but depleted in chromium, whereas the inner layer was enriched in chromium and iron but depleted in nickel. The inner layer was also characterized as layered structure by Fe-rich spinel on top of continuous Cr2O3 layer. Besides, Cr2O3 nodules were readily observed at the oxides/alloy interface.
- Subjects :
- Materials science
Scanning electron microscope
020209 energy
Alloy
Metallurgy
Spinel
technology, industry, and agriculture
Metals and Alloys
chemistry.chemical_element
02 engineering and technology
engineering.material
021001 nanoscience & nanotechnology
Industrial and Manufacturing Engineering
Nickel
chemistry
Chemical engineering
Transmission electron microscopy
Scanning transmission electron microscopy
0202 electrical engineering, electronic engineering, information engineering
engineering
Crystallite
0210 nano-technology
Layer (electronics)
Subjects
Details
- ISSN :
- 21941289 and 10067191
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Acta Metallurgica Sinica (English Letters)
- Accession number :
- edsair.doi...........23623eb187b116609bf1c9b8d1e562aa