论文信息 - A pattern recognition technique for the analysis of grain boundary structure by HREM.

A pattern recognition technique for the analysis of grain boundary structure by HREM.

A pattern recognition technique for the detection of structural units in high resolution images of interfaces is described. The technique uses cross-correlation functions as a means of locating atomic patterns characteristic for an interface and as a measure of similarity between related units. Application is not limited to periodic, or even to planar interfaces. Characteristic structural units can be extracted from an experimental image and some important parameters such as mirror or mirror glide symmetry, and rigid body displacements can be determined without knowledge of the imaging parameters. The technique allows an image of a structural unit with reduced specimen noise to be obtained by averaging over several similar units, even if a boundary is not periodic and not planar.

[1] Abbas Ourmazd,et al. Quantitative chemical lattice imaging: theory and practice , 1990 .

[2] S. Paciornik,et al. Assessment of specimen noise in HREM images of simple structures , 1993 .

[3] Adrian P. Sutton,et al. On the structural unit model of grain boundary structure , 1989 .

[4] A. Sutton. Irrational tilt grain boundaries as one-dimensional quasicrystals , 1988 .

[5] L. Eyring,et al. Calculation, display and comparison of electron microscope images modelled and observed , 1982 .

[6] Geoffrey H. Campbell,et al. Determination of thickness and defocus by quantitative comparison of experimental and simulated high-resolution images , 1993 .

[7] Michael F. Ashby,et al. The structure of grain boundaries described as a packing of polyhedra , 1978 .

[8] H. Kleebe,et al. High‐Resolution Transmission Electron Microscopy Studies of a Near Σ11 Grain Boundary in α‐Alumina , 1994 .

[9] Geoffrey H. Campbell,et al. High-resolution electron microscopy investigation of the (710) twin in Nb , 1993 .

[10] A. Sutton,et al. The structure of internal interfaces: Report of a discussion meeting , 1987 .

[11] M. Hytch,et al. Quantitative criteria for the matching of simulations with experimental HREM images , 1994 .

[12] V. Vítek,et al. A model for grain boundary structure based on random close packing , 1978 .