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3. Sample preparation
3.1 Metallic materials
The current metal sample is massive, a very good electrical and thermal conductor, non-volatile and therefore insensitive to electrons. With metallic materials, the significant micro-relief can be observed:
breaks ;
machined or corroded surfaces;
surface deposits ;
polished and etched sections in much the same way as for optical metallography, the etching creating a significant micro-relief of the microstructure through preferential dissolution of the various phases and/or accentuated dissolution at the interfaces (grain boundaries and phase boundaries);
unetched polished sections...
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