Investigation of Copper Segregation to the Σ5(310)/[001] Symmetric Tilt Grain Boundary in Aluminum

摘要: The {Sigma}5 (310)/[001] symmetric tilt grain boundary (STGB) in the face centered cubic (FCC) metal aluminum with 1at% copper has been studied. model fabricated by ultra-high vacuum diffusion bonding of alloy single crystals. segregation encouraged annealing sample after at 200 C. TEM samples this FCC-material were prepared a new low voltage ion mill under very angles. atomic structure STGB for system was modeled electronic calculations. These theoretical calculations interface indicate that Cu atoms segregate to distinct sites interface. High resolution electron microscopy (HRTEM) and analytical including energy spectroscopic imaging X-ray dispersive spectrometry have used explore boundary. HRTEM images measurements performed using different kinds microscopes, Philips CM300 FEG equipped an filter. amount segregated species quantified preliminary way. To determine positions interface, coupled image simulation first attemptmore » holographic reconstruction from through-focal series used.« less