Atomic structure of interfaces between amorphous and crystalline phases intungsten

The atomic structure of the interfaces in amorphous-crystalline tungsten ob tained in situ by ultrafast quenching to low temperatures from the liquid p hase are investigated by the methods of field ion microscopy. A high degree of localization of imperfections and interfacial incoherence is establishe d. The coordinates of atoms at interfaces correspond either to the crystall ine or to the amorphous phase. Transition regions with intermediate positio ns of atoms were observed only in the vicinity of boundary regions between closely packed crystallographic planes and paraplanes. (C) 1999 American In stitute of Physics. [S1063-777X(99)00903-2].