Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Cleavage planes of icosahedral quasicrystals: A molecular dynamics study
 BelinFerré, E.: Quasicrystals 2003  preparation, properties and applications : Symposium held December 1  3, 2003, Boston, Massachusetts, U.S.A.; At the 2003 MRS fall meeting Warrendale, Pa.: Materials Research Society, 2004 (Materials Research Society Symposium Proceedings 805) ISBN: 1558997431 S.329334 
 Symposium LL: "Quasicrystals  Preparation, Properties and Applications" <2003, Boston/Mass.> Materials Research Society (Fall Meeting) <2003, Boston/Mass.> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer IWM () 
 crack propagation; fracture; quasicrystal; molecular dynamic 
Abstract
The propagation of modeI cracks in a threedimensional icosahedral model quasicrystal has been studied by molecular dynamics techniques. In particular, the dependence on the plane structure and the influence of clusters have been investigated. Crack propagation was simulated in planes perpendicular to five, two and pseudotwofold axes of the binary cosahedral model. Brittle fracture without any crack tip plasticity is observed. The fracture surfaces turn out to be rough on the scale of the clusters. These are not strictly circumvented, but to some extent cut by the dynamic crack. However, compared to the flat seed cracks the clusters are intersected less frequently. Thus the roughness of the crack surfaces can be attributed to the cluster, whereas the constant average heights of the fracture surfaces reflect the plane structure of the quasicrystal. Furthermore a distinct anisotropy with respect to the inplane propagation directions is found.