Effect of oxygen partial pressure on the semiconducting properties of thermally grown chromia on pure chromium
Source abstract
Abstract
Abstract Oxidation of chromium at 800 °C for 30 min at oxygen activity from 5.10−14 atm to 5.10−13 atm have been conducted to grow an insulating chromia. Microstructural and semiconducting properties have been investigated using electron microscopy and photoelectrochemistry. The scales always exhibit a duplex microstructure with equiaxed and columnar grains, as well as a both n-type and insulating semiconduction type. Successive oxidation tests have demonstrated the higher protective nature of this chromia scale compared to the air grown one. Chromia semiconducting properties are finally described vs. oxygen activity in a large range of variation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Catalytic Processes in Materials Science · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. Oxidation behavior of several chromia-forming commercial nickel-base superalloys10.1007/BF02134783 ↗
2. Modelling of the effect of grain boundary diffusion on the oxidation of Ni-Cr alloys at high temperature10.1016/j.corsci.2018.03.001 ↗
3. Factors affecting isothermal oxidation of pure chromium in air10.1016/j.corsci.2017.11.006 ↗
4. Cation diffusion in Cr2O310.1149/1.2427973 ↗
5. Chromium transport through Cr2O3 scales I. On lattice diffusion of chromium10.1007/BF00738381 ↗
6. Chromium transport through Cr2O3 scales. II. Changes in scale morphology during high vacuum treatment of oxidized chromium specimens10.1007/BF00738382 ↗
7. Defects and transport properties of metal oxides10.1007/BF01046721 ↗
8. Electrical conductivity and defect structure of Cr2O3 - I. High temperatures (& 1000°C)10.1016/0167-2738(94)90401-4 ↗
9. Electrical conductivity and defect structure of Cr2O3 - II. Reduced temperatures (<1000°C)10.1016/0167-2738(94)90402-2 ↗
10. On High temperature oxidation of chromium - I oxidation of annealed, thermally etched chromium at 800–1100°C10.1149/1.2129478 ↗
11. Dissusion along grain boundaries and disclocations in oxides, alkali halides and carbides10.1016/0167-2738(84)90160-7 ↗
12. Cation self-diffusion in Cr2O310.1111/j.1151-2916.1983.tb10572.x ↗
13. Self-diffusion in Cr2O3 I. Chromium diffusion in single crystals10.1080/01418619208201560 ↗
14. Self-diffusion in Cr2O3 II. Oxygen diffusion in single crystals10.1080/01418619208201561 ↗
15. Self-diffusion in Cr2O3 III. Chromium and oxygen grain-boundary diffusion in polycrystals10.1080/01418619208201562 ↗
16. Electrical conductivity of single-crystal Cr2O310.1063/1.1702871 ↗
17. Characterization of chromia scales grown on pure chromium in different oxidising atmospheres10.3184/096034000783640866 ↗
18. Duplex n- and p-type chromia grown on pure chromium: a photoelectrochemical and microscopic study10.1007/s11085-016-9648-6 ↗
19. Point defect of chromium (III) oxide
20. Towards the growth of stoichiometric chromia on pure chromium by the control of temperature and oxygen partial pressure10.1016/j.corsci.2017.07.005 ↗
21. About the control of semiconducting properties of chromia: investigation using photoelectrochemistry and orientation mapping in a TEM
22. Structural, magnetic, electronic, defect, and diffusion properties of Cr2O3: a DFT+U study
23. Stress concentration in the bulk Cr 2 O 3 : effects of temperature and Point defects10.1155/2017/7039436 ↗
24. A metallograpllic study of internal oxidation in the alpha solid solutions of copper
25. Semiconducting properties of thermal scales grown on a chromia-forming alloy under controlled oxygen partial pressures10.1016/j.corsci.2014.06.029 ↗
26. Photoelectrochemical imaging of metal-scale decohesion on titanium thermally oxidised in oxygen10.1016/j.corsci.2007.11.010 ↗
27. Automated nanocrystal orientation and phase mapping in the transmission electron microscope on the basis of precession electron diffraction10.1524/zkri.2010.1205 ↗
28. High spatial resolution semi-automatic crystallite orientation and phase mapping of nanocrystals in transmission electron microscopes10.1002/crat.201000676 ↗
29. Automated crystal orientation and phase mapping in TEM10.1016/j.matchar.2014.08.010 ↗
30. Advanced STEM/EDX investigation on an oxide scale thermally grown on a high-chromium iron-nickel alloy under very low oxygen partial pressure10.1016/j.corsci.2015.09.021 ↗
31. Scaling kinetics and scale microstructure of chromia scales formed on Ni-25% Cr model alloy during oxidation in H2O-containing high and low pO2 test gas at 1000 °C10.1149/06618.0001ecst ↗
32. Effect of in-situ gas changes on thermally grown chromia scales formed on Ni – 25Cr alloy at 1000 u C in atmospheres with and without water vapour10.1179/0960340914Z.000000000108 ↗
33. The role of oxygen partial pressure on the nature of the oxide scale on a NiCr model alloy10.1007/s11085-016-9670-8 ↗
34. Stress and adhesion of chromia-rich scaleson ferritic stainless steels in relation with spallation10.1590/S1516-14392004000100012 ↗