The structures of a series of tilt grain boundaries in germanium bicrystals and the interaction of deformation-induced lattice dislocations with these boundaries have been studied using transmission electron microscopy. High-resolution techniques were used to determine the Burgers vectors of the secondary dislocations. The bicrystals were grown from the melt using the Czochralski method to produce the low-Σ grain boundaries: Σ = 11, 33, 41 and 51. The Burgers vector of the secondary dislocations was usually not the primitive Burgers vector which might have been expected by applying O-lattice analysis. This interpretation is consistent with the Burgers vectors determined for secondary dislocations produced by lattice dislocations dissociating on entering the grain boundaries.
|Original language||English (US)|
|Number of pages||27|
|Journal||Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties|
|State||Published - Mar 1988|
Bibliographical noteFunding Information:
The authors would like to thank Mr Gerhard Schmidt for his invaluable assistance in growing the bicrystals, Mr Ray Coles for maintaining the microscopes, and Ms Margaret Fabrizio for her photographic work. The crystal growing facility and the electron microscope facility are part of the Materials Science Center at Cornell and are funded, in part, by NSF. W.S. and D.L.K. acknowledge support from the Materials Science Center. H.W. and C.B.C. acknowledge support from DOE under grant DE-FG02-84ER45092. C.B.C. would also like to thank Professor John Steeds for his hospitality in Bristol and the John Simon Guggenheim Memorial Foundation for a fellowship during the writing of this paper.