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Formability and thermal stability of α′ phase in (Fe 1− y Co y )–(B, C, N) films
Author(s) -
Sunaga K.,
Kadowaki S.,
Tsunoda M.,
Takahashi M.
Publication year - 2004
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.200304622
Subject(s) - formability , thermal stability , materials science , thermal decomposition , lattice (music) , thermodynamics , atomic radius , radius , thermal , decomposition , phase (matter) , crystallography , metallurgy , chemistry , physics , computer security , organic chemistry , computer science , acoustics
In order to find a way to obtain stable α″‐Fe 16 X 2 phase, the formability and thermal stability of α′ (bct) phase were discussed. According to a rigid sphere model, we concluded that the less formability of B for the α′ phase is due to its large atomic radius. We elucidated the difference of thermal stability of α′‐Fe–X, taking into account their decomposition process. While, the decomposition of α′‐Fe–N progresses only by the migration of N, without changing the bone structure of Fe lattice, the additional energy is needed to break the original α‐Fe lattice in the cases of α′‐Fe–B and α′‐Fe–C. Therefore thermal stability of α′‐Fe–B and α′‐Fe–C is higher than that of α′‐Fe–N. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)