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Published online by Cambridge University Press: 01 February 2011
The imaging of nanostructural and topological variations on mechanically or chemically aged SiC materials has been performed using non-destructive Raman and Rayleigh μ-spectrometries. The case of a Hi-Nicalonf/(SiC/BN/C)m composite, corroded under alkali and oxidizing environment (modelled using molten NaNO3), is discussed. It is shown for the first time that Rayleigh imaging offers a competitive alternative to AFM measurements for un-prepared, very corrugated surface of materials containing carbon as a second phase. A comparison is made to the analysis of μ-indented areas performed on a polished section of the Ø∼140 μm SCS-6™ Textron SiC fibre. The “smart” Raman images allowed determining the strain distribution within the whole indented area.