Vacancy loss at grain boundaries in quenched polycrystalline gold

摘要: Vacancy loss at a variety of grain boundaries in 99.999 wt.% pure polycrystalline gold quenched from 930°C and aged 60°C was studied by transmission electron microscopy. The vacancy precipitate (stacking-fault tetrahedra) free zones, which formed the regions adjacent to due these sinks during quenching, were analyzed. sink efficiency both small-angle non-special large-angle found be high presence large chemical potential quenched-in vacancies. While there is some evidence that small angles somewhat smaller than angles, results are not inconsistent with constant for all observed. On other hand, special Σ = 3 coherent twin boundary significantly lower boundaries. discussed relative work field, it concluded that: (1) operate as highly effective potentials; (2) tends fall off decreases or becomes more special, i.e., ordered.