Premium
Subgrain structure formation in pure crystals grown from melts
Author(s) -
Tsivinsky S. V.,
Maslova L. A.
Publication year - 1980
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19800150202
Subject(s) - nucleation , dislocation , crystallography , materials science , condensed matter physics , thermodynamics , composite material , chemistry , physics
The arrangement of low‐angle boundaries and the subgrain structure of crystals with high (≧ 10 5 cm −2 ) dislocation density are considered. Relations to estimate cross dimensions and misorientations of nucleating subgrains are derived. Production conditions for single crystals without nucleating low‐angle boundaries are described and relations to estimate the critical dislocation density, below which subgrain nucleation is highly improbable, are supplied. Macrosubgrain formation mechanisms are described. Growing conditions for crystals free of macrosubgrains are formulated. Equations to estimate their cross dimensions and misorientations are proposed. These are compared with the available experimental data for a variety of materials.