High-resolution electron microscopy of ZnO grain boundaries in bicrystals obtained by the solid-phase intergrowth process

Geometry and electronic structure of [0001]/(1230) Σ = 7 symmetric tilt boundary in ZnO

“…Some types of core structures are simultaneously observed for boundaries with the same misorientation in oxides such as NiO Smith 1987, Merkle et al 1988) and ZnO (Kiselev et al 1997), and this may result from the presence of some structures with similar boundary energies. These four boundaries may be examples of this and hence we deal with the four boundaries equally regardless of the energy difference.…”

“…High resolution images of [OOOI] tilt boundaries in a ZnO bicrystal with a misorientation angle of 31.5", nearly that of Z = 13, have recently been reported by Kiselev et al (1997). In these images, a number of facets, including both symmetric and asymmetric ones, coexist and some of them are close to (1340) or (2570) 2 = 13 symmetric tilt boundaries.…”

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.…”

Ab initiostudy of symmetric tilt boundaries in ZnO

“…Kiselev et al have reported highresolution images of the ͓0001͔ ⌺ϭ13 boundary in a ZnO bicrystal. 9 They found some types of core structures in the tilt boundary. The core structures are constructed by a sequence of channels with coordination numbers close to six.…”