Nucleation and growth processes of alpha-Fe nanocrystals in amorphous NdFeBCoDy: In situ x-ray diffraction studies

W. Li, X.H. Li, Hongyu Sun, J.W. Zhang, X.Y. Zhang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

For a detailed understanding of formation processes of nanocrystals in an amorphous matrix, the study of crystal nucleation and growth processes is of basic interest. In the present study, these processes of α-Fe nanocrystals in amorphous NdFeCoDyB have been studied separately by employing in situ high-temperature x-ray diffraction measurements. A small growth activation energy Eg=(1.8±0.2)eV was determined from the isothermal time dependence of the grain size of α-Fe crystals. By these data together with the nucleation activation energy En=s3.0±0.1deV, a coarse grain size for the α-Fe phase in the α-Fe/Nd2Fe14B nanocomposites developed from amorphous N2FeBCoDy can be understood.
Original languageEnglish
Article number092501
JournalApplied Physics Letters
Volume86
Issue number9
Number of pages3
ISSN0003-6951
DOIs
Publication statusPublished - 2005
Externally publishedYes

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