TITLE

Transmission electron microscopy and atom probe specimen preparation from mechanically alloyed powder using the focused ion-beam lift-out technique

AUTHOR(S)
Pyuck-Pa Choi; Young-Soon Kwon; Ji-Soon Kim; Tala’at Al-Kassab
PUB. DATE
April 2007
SOURCE
Journal of Electron Microscopy;Apr2007, Vol. 56 Issue 2, p43
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The preparation of transmission electron microscopy (TEM) and atom probe-field ion microscopy (AP-FIM) specimens from mechanically alloyed Ti-Cu-Ni-Sn powder has been explored. Applying the focused ion beam (FIB) based in situ lift-out technique, it has been demonstrated that specimen preparation can be carried on single micrometre-sized powder particles without the use of any embedding media. Since the particles did not incorporate any micropores, as revealed by cross-sectioning, the standard procedure known for bulk samples could be simply implemented to the powder material. A sequence of rectangular cuts and annular milling was found to be a highly efficient way of forming a tip-shaped AP-FIM specimen from a square cross-section blank. A Ga level ≤1 at.% was detected if a low beam current of 10 pA was chosen for the final ion-milling stages. Implanted Ga ions were mostly confined to a zone of about 2 nm in thickness and indicated that ion-induced structural transformations were negligible.
ACCESSION #
27041692

 

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