SIMS depth profiles of alloying elements in surface layers formed in Cu-based alloys during annealing

Shigeru Suzuki, Hiroyuki Shibata, Masuo Ito, Tarou Kimura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Secondary ion mass spectrometry (SIMS) was used for characterizing the depth distribution of small amounts of alloying elements in three different copper-based dilute alloys, i.e., copper-chromium, copper-iron, and copper-nickel-silicon alloys. The samples were annealed at high temperatures under a low oxygen partial pressure. The SIMS depth profiles revealed that oxygen penetrated the copper-based alloys, and chromium and silicon were enriched on the surface side so as to form oxides during annealing. On the other hand, chromium and silicon were depleted beneath the enriched surface layer. However, the depth profile of iron was similar to that of copper. These phenomena were likely to be correlated with the reactivity of the alloying elements with oxygen. The formation kinetics of the depleted zones of chromium and silicon has been discussed on the basis of the selective oxidation of these alloying elements.

Original languageEnglish
Pages (from-to)1327-1330
Number of pages4
JournalApplied Surface Science
Volume255
Issue number4
DOIs
Publication statusPublished - 2008 Dec 15

Keywords

  • Alloys
  • Oxidation
  • Oxide
  • Secondary ion mass spectrometry
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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