Published March 2018 | Version v1
Journal article Metadata-only

Phase equilibria of the La-Y system: A metastable samarium-type LaY intermetallic compound

Creators

  • 1. Institute of Technology, East China Jiaotong University, Nanchang, 330100 (China)
  • 2. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083 (China)
  • 3. Institute of Engineering Research, Jiangxi University of Science and Technology, Ganzhou, 341000 (China)

Description

Highlights: • A new invariant reaction has been determined at 717 ± 3 °C using DSC. • Stable phases within the ∼50 at.%Y region investigated for the La-Y system. • The samarium-type δ-LaY has been found to be unstable. - Abstract: Rare earth elements are recently attracting more and more interests due to their dramatic effect as alloying elements. However the study regarding the phase equilibria between rare earth elements are still rare. The thermodynamically stable phases within the ∼50 at.%Y region have been investigated for the La-Y binary system using differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy in the present work. The samarium-type δ-LaY has been found to be unstable while a pure Y phase with fcc crystal structure has been observed. A new invariant reaction has been determined to be bcc-(La,Y) + fcc-Y → dhcp-(La,Y) at 717 ± 3 °C.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.tca.2018.01.013

Additional details

Identifiers

DOI
10.1016/j.tca.2018.01.013;
PII
S0040603118300133;

Publishing Information

Journal Title
Thermochimica Acta
Journal Volume
661
Journal Page Range
p. 41-50
ISSN
0040-6031
CODEN
THACAS

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
50048124
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BCC LATTICES; CALORIMETRY; CRYSTAL STRUCTURE; FCC LATTICES; INTERMETALLIC COMPOUNDS; LANTHANUM COMPOUNDS; METASTABLE STATES; PHASE DIAGRAMS; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; YTTRIUM COMPOUNDS
Descriptors DEC
ALLOYS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; DIAGRAMS; ELECTRON MICROSCOPY; ENERGY LEVELS; EXCITED STATES; INFORMATION; MICROSCOPY; RARE EARTH COMPOUNDS; THREE-DIMENSIONAL LATTICES; TRANSITION ELEMENT COMPOUNDS

Optional Information

Copyright
Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.