Published June 12, 2008 | Version v1
Journal article Metadata-only

Identification of lattice vacancies in the B2-phase region of Ni-Al system by positron annihilation

Creators

  • 1. Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China)
  • 2. Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)

Description

The point defects of B2-type intermetallic compound Ni-Al have been investigated as a function of different Ni compositions ranging from 47 to 55 at.% by means of positron lifetime and coincidence Doppler-broadening (CDB) measurements. The position lifetime of the annealed samples, expressed by single-component lifetime of τ = 170-180 ps, indicates positron saturation trapping at single vacancies in Ni-Al samples. The CDB measurements have been applied to identify these vacancy-type defects formed on the Ni sublattice in the B2-phase Ni-Al alloys

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jallcom.2007.03.065

Additional details

Identifiers

DOI
10.1016/j.jallcom.2007.03.065;
PII
S0925-8388(07)00705-0;

Publishing Information

Journal Title
Journal of Alloys and Compounds
Journal Volume
457
Journal Issue
1-2
Journal Page Range
p. 47-50
ISSN
0925-8388
CODEN
JALCEU

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40011753
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM ALLOYS; ANNEALING; ANNIHILATION; DOPPLER BROADENING; INTERMETALLIC COMPOUNDS; NICKEL ALLOYS; POSITRONS; SPECTROSCOPY; VACANCIES
Descriptors DEC
ALLOYS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTARY PARTICLES; FERMIONS; HEAT TREATMENTS; INTERACTIONS; LEPTONS; LINE BROADENING; MATTER; PARTICLE INTERACTIONS; POINT DEFECTS; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.