An Additional Displacement of the Crystal Lattice across Antiphase Domain Boundaries in β-Brass

抄録

Antiphase domain boundaries (APBs) formed in quenched β-brass have been investigated by transmission electron microscopy. Anomalous contrast of images has been observed in the bright fields with \bar12\bar1 and 1\bar10 fundamental reflections under a two beam condition. The image contrast of APBs is analyzed by the method of the image matching with electron micrographs computed by taking into account detailed geometrical conditions of specimens. The contrast is due to local lattice expansion at APBs. An additional displacement of the lattice across APBs has been estimated to be in the range of 0.1–0.5 Å.