Lanthanum-silicon system

Authors
Bulanova, MV Zheltov, PN Meleshevich, KA Saltykov, PA Effenberg, G Tedenac, JC
Citation
Mv. Bulanova et al., Lanthanum-silicon system, J ALLOY COM, 329(1-2), 2001, pp. 214-223
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
329
Issue
1-2
Year of publication
2001
Pages
214 - 223
Database
ISI
SICI code
0925-8388(20011114)329:1-2<214:LS>2.0.ZU;2-X
Abstract
By using differential thermal analysis, metallography and X-ray examination , the La-Si phase diagram was constructed. La5Si3, La3Si2, La5Si4, LaSi wer e confirmed. Two lanthanum disilicides were found - LaSi2-a1 (structure typ e alpha -GdSi2) and LaSi2-a2 (structure type alpha -ThSi2), the two-phase r egion LaSi2-a1 + LaSi2-a2 being very narrow. The LaSi and LaSi2-a1 intermet allics melt congruently at 1620 and 1730 degreesC, respectively. La5Si3, La 3Si2, La5Si4 and LaSi2-a2 form in peritectic reactions at 1260, 1470, 1570 and similar to 1600 degreesC, respectively. Three eutectics occur at 722 +/ -9 (11 at.% Si), 1528 +/-9 (55.5 at.% Si) and 1205 +/-7 degreesC (82 at.% S i). (C) 2001 Elsevier Science BV All rights reserved.