Computer simulation of spherical crystal surfaces: Stacking faults and partial dislocation in f.c.c. crystals

摘要: Abstract Previous calculations (Brandon and Perry 1967, Brandon 1968) have now been extended to cover the case of a single ribbon stacking fault separating two parallel Shockley partial dislocations in hemispherical f.c.c. crystal. Image forces are neglected classical isotropic elasticity theory is used throughout. It shown that splitting perfect dislocation into partials may make inapplicable g · b rule for predicting contrast field-ion microscope. also demonstrated dissociation need not necessarily be visible image. A time-of-flight technique was determine energy spectrum atoms ejected by ion bombardment from metal target. The beam pulsed synchronism with magnetically suspended rotor, spinning at speeds up 3000 rev. sec−1. flight path 50 cm between target rotor sufficient obtain dispersed deposit on rim all atom energies up...