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Showing 1 to 10 of 10 for “"CBED"”.
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TEM-Untersuchungen zum Gefüge und zu mechanischen Spannungen in Metallisierungen für SAW-Bauelemente
… is a challenge for the future. The CBED (convergent beam electron diffraction) technique has shown the best resolution, however, it can only be applied to TEM lamellas. The aim of this work was to measure the stress within the SAW metallizations by using the CBED method. With it, we …
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Investigation of lattice mismatch in rhenium containing nickel-base superalloys
… that the x-ray diffraction data and the CBED data yield the same results for room temperature lattice mismatch, although CBED requires a significant amount of data in order to be useful due to the scatter in the technique. The dislocation analysis technique gave larger negative values of …
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Quantitative High-angle Annular Dark Field Scanning Transmission To Electron Microscopy For Materials Science
… and to convergent beam electron diffraction (CBED) to measure the degree of chemical order in intermetallic nanoparticles. The experimental and simulation results on the high–angle scattering of 300 keV electrons in crystalline silicon provide a new contribution to the understanding of the …
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Decagonal quasicrystals in the Al(Si)-Cu-Co alloy system
… several millimeters in length. The TEM study (CBED, LACBED and HREM) shows that it has high degree of perfection. The CBED and LACBED patterns taken along the tenfold axis, 2-fold axes have very sharp Kikuchi bands and HOLZ lines which denotes that the quasicrystal is perfect in the region of …
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Determination of local crystal symmetry in complex, multielement, ferroelectric perovskites and alloys
… scanning convergent beam electron diffraction (SCBED) based techniques. The applications of SCBED characterization demonstrated here include: ferroelectric BaTiO3 single crystal, relaxor-ferroelectric (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 (x=0.08) single crystal, and multi-principal-element alloy …
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Characterization of III-V compound semiconductor heterostructures grown by metalorganic chemical vapor deposition
… technique and the convergent beam technique (CBED) were used. Cross sectional, plan view and cleavage samples using the ion milling or chemical etching method were used for TEM sample preparation. Tetragonal distortion occurs in the strained layer superlattice (SLS). Misfit dislocations are …
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Grain boundary studies in ordered intermetallic compound Ni3 Al
… which were not shown in brittle Ni₃Al. Using CBED techniques, symmetry information of a single crystal was obtained. However, an extension to bicrystals was not successful. In order to study the possible disordering and segregation near grain boundaries, two different atomistic computer …
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Characterization of novel microstructures in Al-Fe-V-Si and Al-Fe-V-Si-Y alloys processed at intermediate cooling rates
… addition, convergent beam electron diffraction (CBED) and selected area electron diffraction (SAD) were used to characterize a competing intermetallic phase, namely, a hexagonal phase identified as h-AlFeSi (P6/mmm space group with a = 2.45 nm c = 1.25 nm) with evidence of a structural …
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Processing of aluminium and titanium alloys by severe plastic deformation
… of [114] convergent beam electron diffraction (CBED) zone axis patterns were obtained at 148.7 kV with a 20 nm diameter electron probe from dislocation-free regions close to and away from the grain boundaries in the billets processed by ECAP through two and four passes after cooling to 80 K. The …
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Population dynamics of potato cyst nematodes in relation to temperature
Population dynamics of potato cyst nematodes Globodera rostochiensis (Woll.) Skarbilovich and G. pallida (Stone) and their interactions with potato plants are not sufficiently described to explain changes in population dynamics and yield reduction among seasons and locations. This thesis describes …