DEVELOPMENT OF FLUCTUATIONS INTO DOMAINS DURING ORDERING IN FE3AL

The early-stage kinetics of a second-order phase transition with a nonconserved order parameter (the B2-DO3 transition in Fe3Al) has been investigated using in situ synchrotron x-ray scattering. A line-shape analysis allows the short- and long-range-order components to be determined separately as a...

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Veröffentlicht in:	Physical review letters 1992-03, Vol.68 (11), p.1742-1745
Hauptverfasser:	PARK, B, STEPHENSON, GB, ALLEN, SM, LUDWIG, KF
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Metals. Metallurgy Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physical Sciences Physics Physics, Multidisciplinary Science & Technology
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	The early-stage kinetics of a second-order phase transition with a nonconserved order parameter (the B2-DO3 transition in Fe3Al) has been investigated using in situ synchrotron x-ray scattering. A line-shape analysis allows the short- and long-range-order components to be determined separately as a function of time during the ordering process. At all temperatures investigated, the correlation length of short-range-order fluctuations xi(t) grows to a maximum and then decreases, while the long-range-order domain size L(t) increases monotonically from an initial value 1 order of magnitude larger than xi.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.68.1742