Published March 1996 | Version v1
Journal article Metadata-only

EXAFS study of the local atomic order in Ti2AlX(X=Nb,Mo) B2 intermetallic compounds

Creators

  • 1. Office National d'Etudes et de Recherches Aerospatiales (ONERA), 92 - Chatillon (France)
  • 2. Centre National de la Recherche Scientifique (CNRS), 86 - Poitiers (France). Lab. de Metallurgie Physique
  • 3. Paris-11 Univ., 91 - Orsay (France). Lab. pour l'Utilisation du Rayonnement Electromagnetique (LURE)

Description

Extended X-ray absorption fine-structure (EXAFS) has been used to study the local atomic order in Ti2AlMo and Ti2AlNb in the B2 phase. It is found that the Mo and Nb atoms have different behaviors. Whereas the Ti2AlMo alloy is ordered as a pseudo-B2 structure in which the Mo and Al atoms are localized on one site and Ti atoms on the other, the Ti2AlNb alloy exhibits a more disordered behavior since the Nb and the Ti atoms are distributed on both sites. EXAFS experiments allowed us to quantify the fraction of Nb on each site in Ti2AlNb as well as the bond lengths in both alloys. (orig.)

Additional details

Publishing Information

Journal Title
Journal de Physique. 4
Journal Volume
6
Journal Issue
2
Series
Supplement to J. Phys., III v. 6(3).
Journal Page Range
p. 15-20.
ISSN
1155-4339
CODEN
JPICEI

Conference

Title
The intermetallics - superalloys of quasi-crystals.
Original Conference Title
38. Colloque de Metallurgie de l'INSTN: Les Intermetalliques - des Superalliages aux Quasicristaux
Acronym
38. metallurgical colloquium of INSTN
Dates
20-22 Jun 1995.
Place
Saclay (France).

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
27059010
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ALUMINIUM ALLOYS; BOND LENGTHS; INTERMETALLIC COMPOUNDS; MOLYBDENUM ALLOYS; NIOBIUM ALLOYS; TITANIUM ALLOYS; X-RAY DIFFRACTION; X-RAY SPECTRA
Descriptors DEC
ALLOYS; COHERENT SCATTERING; DIFFRACTION; SCATTERING; SPECTRA; TRANSITION ELEMENT ALLOYS