Electron microscopic investigation of long period order in Ag3Mg

摘要: Abstract The anti-phase domain structure of the ordered alloy Ag 3 Mg was studied by means electron transmission and diffraction using polycrystalline bulk samples. microstructure confirmed to be composed fairly large areas with common c -axis tetragonal crystal. Besides periodic rectilinear domains, these consist domains which have different sublattice occupations. nonlinear boundaries (APB's) separating last mentioned not been detected previously in alloys periodically structures. On basis higher order satellite configurations observed patterns, distribution periods for M = 1 among those 2 is obviously uniform. patterns confirm theory Fujiwara. (1) other hand, images suggest that mixing also shows some regularity. cannot perfectly regular, because measured average value varies continuously between 1.67 2.00 as a function composition. This implies several lengths [(2 n + 1) 0 ] superlong occur at same time really present investigation.