Journal
OXIDATION OF METALS
Volume 90, Issue 3-4, Pages 267-277Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11085-018-9848-3
Keywords
Chromia; Photoelectrochemistry; Spallation
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Funding
- PSEUDO project of the French National Research Agency (ANR)
- Investments for the Future Program [AN-10-LABX-44-01]
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Pure chromium oxidized at 900 degrees C at low oxygen partial pressure (10(-12)atm) gives duplex Cr2O3 scale with an internal part made of equiaxed grains and exhibiting an n-type conduction, and an external part made of columnar grains and exhibiting a p-type conduction. Spalled regions occurring during cooling have been studied with photoelectrochemical techniques at a microscale. New information in the form of a specific image (structural quality image) could be obtained and revealed a level of structural defect density in the internal chromia subscale higher than that measured in the non-spalled region. The results complement the spallation scenario proposed in part I of this work.
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