Use of the Gibbs-Thompson relation to obtain the interfacial energy of delta ' precipitates in Al-Li alloys

Authors
Noble, B Bray, SE
Citation
B. Noble et Se. Bray, Use of the Gibbs-Thompson relation to obtain the interfacial energy of delta ' precipitates in Al-Li alloys, MAT SCI E A, 266(1-2), 1999, pp. 80-85
Citations number
35
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
266
Issue
1-2
Year of publication
1999
Pages
80 - 85
Database
ISI
SICI code
0921-5093(19990630)266:1-2<80:UOTGRT>2.0.ZU;2-P
Abstract
The delta' phase in Al-Li alloys containing 6.4-7.6 at.% Li has been allowe d to coarsen for several hundred hours at temperatures of 130-150 degrees C . The size of the delta' precipitates has been measured by transmission ele ctron microscopy (TEM). The concentration of lithium in solid solution in e quilibrium with delta' particles of various sizes has been measured by an e lectrical resistivity technique. The resulting TEM and resistivity data are used to solve the Gibbs-Thompson equation to give a value for the alpha/de lta' interfacial free energy. A value of 0.041 +/- 0.01 J m(-2) has been ob tained for this interfacial energy and this has been compared with the rang e of values reported in the literature. (C) 1999 Elsevier Science S.A. All rights reserved.