Observation of precipitates in aluminum alloys by sub-micrometer resolution tomography using fresnel zone plate

Hiroyuki Toda, Keisuke Minami, Masakazu Kobayashi, Kentaro Uesugi, Akihisa Takeuchi, Toshiro Kobayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


An X-ray microtomography combined with hard X-ray imaging microscopy, that potentially has a spatial resolution of the order of 10 to 100 nm, has been applied to the three-dimensional observation of internal microstructural features in overaged Al-Ag alloys. A Fresnel zone plate is used as an objective with a magnification of 49.3 times. Imaging of resolution test patterns has indicated spatial resolutions of around 180 and 200 nm in the vertical and horizontal directions, respectively. This paper reports the first impression of the microstructural imaging by means of such a high-resolution imaging microtomography. Precipitate microstructures are readily observed and quantified in terms of volume fraction and orientation. Conventional microtomography with a simple projection geometry is also applied for comparison purpose at the highest resolution level currently available at a third generation synchrotron facility. It would appear that the present technique provides a unique potential to observe the 3-D geometry and spatial distribution of nanoscopic features inside samples that are several orders of magnitude thicker than thin-foil specimens for TEM observation.

Original languageEnglish
Title of host publicationAluminium Alloys 2006
Subtitle of host publicationResearch Through Innovation and Technology - Proceedings of the 10th International Conference on Aluminium Alloys
PublisherTrans Tech Publications Ltd
Number of pages6
EditionPART 2
ISBN (Print)9780878494088
Publication statusPublished - 2006
Externally publishedYes
Event10th International Conference on Aluminium Alloys, (ICAA-10) - Vancouver, Canada
Duration: Jul 9 2006Jul 13 2006

Publication series

NameMaterials Science Forum
NumberPART 2
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Other10th International Conference on Aluminium Alloys, (ICAA-10)

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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