Etude par Sonde Atomique Tomographique de la formation de nano ...

tel-00751814, version 1 - 14 Nov 2012
Appendixes
(a) (b)
Figure 5. (a) FIB principle; (b) SEM image of a powder at the final stage of annular
milling without and after Pt (W) reinforcement (done by F. Cuvilly).
d) Specimen preparation for neutron diffraction experiments
In order to perform X-ray diffraction experiments on a single powder particle of an ODS
model alloy, specific specimens were prepared at GPM. The preparation includes several
stages. They are schematically represented in Figure 6.
Figure 6. Schematic representation of necessary stages for the preparation of a powder
grain for X-ray diffraction study.
First, a stainless steel pre-tip with an end radius of few micrometers is prepared by
electropolishing. The “double layer” method is used.
Second, a Si post with a diameter of 5 µm is stuck by silver glue on the pre-tip using the
micromanipulator.
Stainless steel
pre-tip
Si post
5 µm
Layer of glue
Stage 1 Stage 2 Stage 3
Powder grain
(5-10µm)
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