Advertisement

3D structures of alloys and nanoparticles observed by electron tomography

Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

3D structures of bulk alloys and nanoparticles have been studied by means of electron tomography using scanning transmission electron microscopy (STEM). In the case of nanoparticles of Fe-Pd alloy, particle size, shape, and locations were reconstructed by weighted backprojection (WBP), as well as by simultaneous iterative reconstruction technique (SIRT). We have also estimated the particle size by simple extrapolation of tilt-series original data sets, which proved to be quite powerful. We demonstrate that WBP yields a better estimation of the particle size in the z direction than SIRT does, while the latter algorithm is superior to the former from the viewpoints of surface roughness and dot-like artifacts. In contrast, SIRT gives a better result than WBP for the reconstruction of plate-like precipitates in Mg-Dy-Nd alloys, in respect of the plate thickness perpendicular to the z direction. We also show our recent results on the 3D-tomographic observations of microstructures in Ti-V-Al, Ti-Nb, Cu-Ag, and Co-Ni-Cr-Mo alloys obtained by STEM tomography.

Keywords

Tilt Angle Electron Tomography Scanning Transmission Electron Microscopy Discontinuous Precipitation Atom Probe Tomography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Hirsch P, Howie A, Nicholson R, Pashley DW, Whelan MJ, Electron Microscopy of Thin Crystals (Krieger, Florida,1977).Google Scholar
  2. 2.
    Buseck P, Cowley JM, Eyring L, (ed.), High-Resolution Transmission Electron Microscopy and AssociatedTechniques (Oxford, New York, 1992).Google Scholar
  3. 3.
    Shirai M, Horiuchi T, Horiguchi A, Matsumura S, Yasuda K, Watanabe M, Masumoto T, Morphological change inFePt nanogranular thin films induced by irradiation with 2.4MeV Cu2+ ions: electron tomography observation, Mater.Trans. 47(1), 52-58 (2006).Google Scholar
  4. 4.
    Kimura K, Hata S, Matsumura S, Horiuchi T, Dark-field transmission electron microscopy for a tilt series of orderingalloys: toward electron tomography, J. Electron Microscopy 54(4), 373-377 (2005).CrossRefGoogle Scholar
  5. 5.
    Barnard JS, Sharp J, Tong JR, Midgely PA, High-resolution three-dimensional imaging of dislocations, Science 313,319 (2006).CrossRefGoogle Scholar
  6. 6.
    Midgley PA, Weyland M, 3D electron microscopy in the physical sciences: the development of Z-contrast andEFTEM tomography, Ultramicroscopy 96, 413-431 (2003).CrossRefGoogle Scholar
  7. 7.
    Twitchett AC, Yates TJV, Dunin-Borkowski RE, Newcomb SB, Midgley PA, Three-dimensional electrostatic potentialof a Si p-n junction revealed using tomographic electron holography, J. Phys. Conf. Ser. 26, 29-32 (2006).CrossRefGoogle Scholar
  8. 8.
    Kübel C, Voigt A, Schoenmakers R, Otten M, Su D, Lee, Carlsson A, Bradley J, Recent advances in electrontomography: TEM and HAADF-STEM tomography for materials science and semiconductor applications, Microsc.Microanal. 11, 378-400 (2005).CrossRefGoogle Scholar
  9. 9.
    Midgley PA, Dunin-Borkowski RE, Electron tomography and holography in materials science, Nature Mater. 8,271-280 (2009).CrossRefGoogle Scholar
  10. 10.
    Fujita T, Qian LH, Inoke K, Erlebacher J, Chen MW, Three-dimensional morphology of nanoporous gold, Appl.Phys. Lett. 92(25), 251902-1−251902-3 (2008).Google Scholar
  11. 11.
    Benlekbir S, Epicier T, Bausach M, Aouine M, Berhault G, STEM-HAADF electron tomography of palladiumnanoparticles with complex shapes, Philos. Mag. Lett. 89(2), 145-153 (2009).CrossRefGoogle Scholar
  12. 12.
    Alloyeau D, Ricolleau C, Oikawa T, Langlois C, Le Bouar Y, Loiseau A, Comparing electron tomography andHRTEM slicing methods as tools to measure the thickness of nanoaprticles, Ultramicrosc. 109, 788-796 (2009).CrossRefGoogle Scholar
  13. 13.
    Sato K, Aoyagi K, Konno TJ, Three-dimensional shapes and distribution of FePd nanoparticles observed by electrontomography using HAADF-STEM, J. Appl. Phys. 107(2), 024304-1−024304-7 (2010).Google Scholar
  14. 14.
    Radermacher M, Weighted Back-Projection Method, in: Frank J. (ed.), Electron Tomography: Three-dimensionalImaging with the Transmission Electron Microscope (Plenum Press, New York, London, 1992).Google Scholar
  15. 15.
    Gilbert P, Iterative methods for the three-dimensional reconstruction of an object from projections, J. Theor. Biol. 36,105-117 (1972).CrossRefGoogle Scholar
  16. 16.
    Sato K, Hirotsu Y, Mori H, Wang Z, Hirayama T, Long-range order parameter of single L10-FePd nanoparticledetermined by nanobeam electron diffraction, J. Appl. Phys. 98(2), 024308-1−024308-8 (2005).Google Scholar
  17. 17.
    Arslan I, Tong J, Midgley PA, Reducing the missing wedge: High-resolution dual axis tomography of inorganicmaterials, Ultramicrosc. 106, 994-1000 (2006).CrossRefGoogle Scholar
  18. 18.
    Epicier T, Benlekbir S, Sato K, Tournus F, Konno TJ, "STEM-HAADF tomography and generalized stereoscopy 3Dstudies of nano-particles in Transmission Electron Microscopy", invited talk at MicroScience 2010 (session M2.1),8London, UK, June 29 – July 1, 2010.Google Scholar
  19. 19.
    Sato K, Matsumoto H, Kodaira K, Konno TJ, Chiba A, Phase transformation and age-hardening of hexagonal α’martensite in Ti-12%V-2%Al alloys studied by TEM, J. Alloys Compd. 506, 607-614 (2010).CrossRefGoogle Scholar
  20. 20.
    Semboshi S, Shirai T, Konno TJ, Hanada S, In-situ transmission electron microscopy observation on the phasetransformation of Ti-Nb-Sn shape memory alloys, Metall. Mater. Trans. 39A, 2820-2829 (2008).CrossRefGoogle Scholar
  21. 21.
    Shizuya E, Konno TJ, A study on age hardening in Cu-Ag alloys by transmission electron microscopy in Frontiers inMaterials Science, edited by Fujikawa Y, Nakajima K, Sakurai T (Springer-Verlag, New York, 2008).Google Scholar
  22. 22.
    Konno TJ, Aoyagi K, Shizuya E, Lee JB, Sato K, Kiguchi T, Hiraga K, Phase transformation behavior in alloysviewed by 3D-tomography, Proc. 9th Asia-Pacific Microscopy Conference (APMC9), 227-228 (2008).Google Scholar
  23. 23.
    Konno TJ, Tadano T, Matsumoto H, Chiba A, Microstructure of Co-Ni based superalloys, Proc. 14th EuropeanMicroscopy Congress (EMC2008), 2, 447-448 (2008).Google Scholar

Copyright information

© Springer Science+Businees Media, LLC 2011

Authors and Affiliations

  • Kazuhisa Sato
    • 1
  • Kenta Aoyagi
    • 1
  • Toyohiko J. Konno
    • 1
  1. 1.Institute for Materials ResearchTohoku UniversitySendaiJapan

Personalised recommendations