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Phase Transformation in F.C.C. Thorium and its Theoretical Stability on the Path of Transformation
Author(s) -
Thakur K. P.,
Ahmad S.
Publication year - 1989
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.2221550213
Subject(s) - stress (linguistics) , transformation (genetics) , thorium , stability (learning theory) , computation , phase (matter) , deformation (meteorology) , morse potential , thermodynamics , path (computing) , materials science , energy (signal processing) , physics , crystallography , atomic physics , chemistry , mathematics , quantum mechanics , composite material , metallurgy , computer science , philosophy , biochemistry , linguistics , uranium , algorithm , machine learning , gene , programming language
Theoretical calculations are carried out to locate the stress‐free b.c.c. phase in f.c.c. thorium on the basis of physical computations of the forces of atomic interactions. Internal energies corresponding to the stress‐free b.c.c. and stress‐free f.c.c. phases and the required stress and energy changes for the f.c.c. → b.c.c. transformation in thorium are presented. Ranges of G and S stability are identified according to the Born stability criterion, by computing the numerical values of the respective elastic moduli on the line of deformation connecting the stress‐free b.c.c. and stress‐free f.c.c. phases of the crystal. The generalised Morse potential model is used to carry out the calculations.