Biomedical Engineering Reference
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Fig. 6.56
Bright-field TEM
image of a superconducting
ceramic, YBa
2
Cu
3
O
7
,after
EDS chemical analysis on the
walls of the twins. We can see
the traces of carbon
contamination (
arrows
) due
to the electron beam
(
J. Ayache,
CNRS-UMR8126-IGR,
Vi l lejui f
)
Fig. 6.57
Bright-field TEM
image of a superconducting
ceramic, YBa
2
Cu
3
O
7
,
showing irradiation damage
under the electron beam.
They appear in the form of
pores (
arrows
). This damage
is encouraged by the strong
tendency toward
decomposition, due to the
non-stoichiometry of these
perovskite oxides (
J. Ayache,
CNRS-UMR8126-IGR,
Vi l lejui f
)
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