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The Ordering of Ni 3 V
Author(s) -
Tanner L. E.
Publication year - 1968
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19680300229
Subject(s) - nucleation , crystal twinning , crystallography , substructure , tetragonal crystal system , materials science , recrystallization (geology) , stoichiometry , electron microscope , macle , phase (matter) , diffraction , electron diffraction , transmission electron microscopy , chemical physics , chemistry , microstructure , crystal structure , thermodynamics , nanotechnology , physics , optics , paleontology , structural engineering , organic chemistry , biology , engineering
Stoichiometric Ni 3 V undergoes a cubic → tetragonal ordering transition (Al → DO 22 ) by means of nucleation and growth. Electron diffraction microscopy and other experimental techniques reveal that the reaction is continuous, proceedind in three stages: I. Nucleation of coherent particles of the ordered phase in clusters of common orientation; II. Growth of these clustered nuclei to impingement forming isolated cells of unique orientation ‐ each cell is subdivided into anti‐phase domains; III. Growth of the cells to consume the remaining disordered phase, producing a mosaic substructure of mutually orthogonal cells, or “transformation twins”. Severe internal strains develop during the sequence, and secondary structural changes, such as twinning and recrystallization, effect their relief.