ALUMINUM COMPOUNDS OF THE RARE-EARTHS - ENTHALPIES OF FORMATION OF YB-AL AND LA-AL ALLOYS

Authors
BORZONE G CARDINALE AM PARODI N CACCIAMANI G
Citation
G. Borzone et al., ALUMINUM COMPOUNDS OF THE RARE-EARTHS - ENTHALPIES OF FORMATION OF YB-AL AND LA-AL ALLOYS, Journal of alloys and compounds, 247, 1997, pp. 141-147
Citations number
46
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
247
Year of publication
1997
Pages
141 - 147
Database
ISI
SICI code
0925-8388(1997)247:<141:ACOTR->2.0.ZU;2-9
Abstract
The standard molar enthalpies of formation for the different solid La- Al and Yb-Al alloys have been measured by means of direct calorimetry. The composition and equilibrium state of the Samples were checked by micrographic and X-ray diffraction techniques. The following values ha ve been obtained (kJ (mol atoms)(-1)): LaAl, Delta(form)H degrees = - 46.0+/-2; LaAl, Delta(form)H degrees = - 50.5+/-2; LaAl3 Delta(form)H degrees = - 44.0+/-2; La3Al11 Delta(form)H degrees = - 41.0+/-2; Delta bAl(3) Delta(form)H degrees = - 39.5+/-2; YbAl3 Delta(form)H degrees = - 32.5+/-2. Experimental results are discussed and compared with lit erature data.