Microstructural analysis of impurity segregation around β-Nb precipitates in Zr-Nb alloy using positron annihilation spectroscopy and atom probe tomography

T. Toyama, Y. Matsukawa, K. Saito, Y. Satoh, H. Abe, Y. Shinohara, Y. Nagai

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Impurity segregation at the interface between β-Nb precipitates and α-Zr matrix in Zr-2.5 wt.%Nb alloy was investigated by complementary analysis with positron annihilation spectroscopy (PAS) and atom probe tomography (APT). Fe segregation and Fe-decorated defects were found at the interface. PAS also suggested that Fe was segregated to a concentration of several tens of percent at a local region at the interface, which is approximately one order of magnitude higher than APT and difficult to observe directly even using APT.

Original languageEnglish
Article number10717
Pages (from-to)156-159
Number of pages4
JournalScripta Materialia
Volume108
DOIs
Publication statusPublished - 2015 Nov 1

Keywords

  • Atom probe tomography
  • Impurity segregation
  • Positron annihilation spectroscopy
  • Precipitate interface
  • Zirconium alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Microstructural analysis of impurity segregation around β-Nb precipitates in Zr-Nb alloy using positron annihilation spectroscopy and atom probe tomography'. Together they form a unique fingerprint.

Cite this