Three-dimensional atomic scale analysis of nanostructured materials

A. Cerezo, M. Abraham, P. Clifton, H. Lane, D. J. Larson, A. K. Petford-Long, M. Thuvander, P. J. Warren, G. D W Smith

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The 3-dimensional atom probe (3DAP) has been used to provide atomic-scale microcharacterisation of a number of nanostructured materials. Grain boundary segregation has been investigated in electrodeposited nanocrystalline nickel and Ni-P. In the nanocrystalline nickel, there was no observable grain boundary segregation in the as-deposited condition. After annealing, carbon and sulphur contamination was found at the boundary of an abnormally-grown grain. In the as-deposited Ni-P alloy, only limited grain boundary segregation of P is seen, but annealing produces significant segregation and the formation of Ni3P precipitates at grain boundaries. The phase chemistry in a melt-spun amorphous Fe-Si-Cu-Nb-B-Al (FINEMET-type) alloy has also been studied, and the hetereogeneous nucleation of Fe-Si nanocrystals at Cu precipitates shown conclusively. It is found that at early stages of crystallisation, there is only limited partitioning of the Si between the nanocrystals and the amorphous matrix. Atom probe studies of thin layered films have historically been limited by specimen preparation problems, but recent advances have now yielded data on metallic multilayer films. This has allowed atomic-scale measurements of interface chemistry in these films for the first time.

Original languageEnglish (US)
Pages (from-to)731-739
Number of pages9
JournalMicron
Volume32
Issue number8
DOIs
StatePublished - Jan 1 2001

Keywords

  • Atom probe
  • FINEMET
  • Multilayers
  • Nanocrystalline material
  • Nanostructures

ASJC Scopus subject areas

  • Structural Biology
  • Materials Science(all)
  • Physics and Astronomy(all)
  • Cell Biology

Fingerprint Dive into the research topics of 'Three-dimensional atomic scale analysis of nanostructured materials'. Together they form a unique fingerprint.

Cite this