HREM analysis of structure and defects in a ?5 (210) grain boundary in rutile

Theoretical Investigations of Interfaces in Electroceramic Materials

“…The second study [17], focussed on the Σ5 36.9°(210)[001] tilt boundary which has a less ordered structure. After relaxation, this grain boundary was also characterised by an in-plane translation ( ~1/5[120] ) which agreed reasonably well with the experimental images [17,37]. The resulting structure conserved the mirror symmetry of the oxygen sublattice but not the metal sublattice and is shown in Fig.…”

Structure, energy and solute segregation behaviour of [110] symmetric tilt grain boundaries in yttria-stabilized cubic zirconia

“…Recently, grain-boundary studies using bicrystals have been shown to be very powerful in ceramic materials, and the method is applied to many kinds of ceramic oxide (Merkle and Smith 1987, Dahmen et al 1994, Ho¨che et al 1994, Browning and Pennycook 1996, Kiselev et al 1997, Watanabe et al 1998, Yan et al 1998, Ikuhara et al 1999, Dickey et al 2001, Nufer et al 2001, Fabris et al 2002, Sato et al 2002, Shibata et al 2002a, 2002b, Zhang et al 2002. Bicrystal experiments have an advantage to be carried out because grain-boundary geometries can be arbitrarily controlled.…”

Origin of differences in the excess volume of copper and nickel grain boundaries

“…While excess volume is recognized as a key materials parameter probing it in real materials remains extremely challenging. A small number of studies have characterized excess volume for specific GBs using high-resolution electron microscopy [12,13]. More recently ensemble average excess volumes have been determined for bulk polycrystalline samples of copper and nickel using highprecision difference dilatometry [14,15].…”