Defect detection in Fe-Cr alloys with positron annihilation doppler broadening spectroscopy

Veronika Sabelová*, Martin Petriska, Jana Veterníková, Vladimír Slugeň, Jarmila Degmová, Simo Kilpeläinen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

2 Citations (Scopus)

Abstract

Positron annihilation Doppler broadening spectroscopy (DBS) has been used for the detection of structural defects in Fe-9wt%Cr (Fe-9Cr) alloy in the as-prepared and implanted states. Defects were created by He and H ion implantation with a kinetic energy of 250 keV. DBS is a nondestructive method and is a unique tool for the observation of open volume defects like vacancies and vacancy clusters in solids. A positron beam with variable positron energy was used for the measurement of defect depth profiles up to 1.5 μm. The obtained results provide qualitative and semi-quantitative information about radiation induced defects and their chemical environment. Although the collision damage from helium implantation was one order of magnitude higher than for the case of hydrogen, the changes in S and W parameters are much less significant, probably due to considerably lower mobility of helium in the implanted materials, which results in helium capture by the created open volume defects.

Original languageEnglish
Title of host publicationPositron and Positronium Chemistry X
Pages270-273
Number of pages4
Volume733
DOIs
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventInternational Workshop on Positron and Positronium Chemistry - Smolenice Castle, Smolenice, Slovakia
Duration: 5 Sep 20119 Sep 2011
Conference number: 10

Publication series

NameMaterials Science Forum
Volume733
ISSN (Print)02555476

Conference

ConferenceInternational Workshop on Positron and Positronium Chemistry
Abbreviated titlePPC
CountrySlovakia
CitySmolenice
Period05/09/201109/09/2011

Keywords

  • Alloy
  • Chromium
  • Doppler broadening
  • Iron
  • Positron annihilation
  • Srim

Fingerprint Dive into the research topics of 'Defect detection in Fe-Cr alloys with positron annihilation doppler broadening spectroscopy'. Together they form a unique fingerprint.

Cite this