Initial 119Sn Mossbauer spectroscopy and X-ray diffractometry investigations of electrodeposited tin-chromium and tin-zinc-chromium alloys

Mahmoud El-Sharif, C. U. Chisholm, I. W. Brooke, E. Kuzmann, A. Vértes

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Abstract

119Sn conversion electron Mossbauer spectroscopy, X-ray diffractometry and energy dispersive X-ray analysis (EDAX) were employed to investigate microstructure, composition and phases present in as-electroplated Sn-Cr and Sn-Cr-Zn alloys deposited on copper substrates. In the Sn-Cr deposits Cu, β-Sn, Cr-Sn phases can be identified by X-ray diffractometry. The phase composition is significantly different between the samples prepared with relatively higher and lower current densities. In the diffractograms of Sn-Cr-Zn deposits Cu, β-Sn, Zn phases can be well identified. A small intensity amorphous peak is also present, which can perhaps be associated with the presence of some amorphous Zn and Sn alloy. 119Sn Mossbauer spectra of Sn-Cr deposits exhibit an asymmetric broad main line centered near the isomer shift characteristic of β-Sn as well as they contain a small component near the zero velocity which can be attributed to a SnO2 phase based upon its characteristic. 119Sn Mossbauer spectra of Sn-Cr-Zn deposits are roughly similar to those of Sn-Cr deposits although the Mossbauer parameters of the third phase are different and vary with the Zn content. The presence of SnO2 on the surface mainly in the Sn-Cr samples can be attributed to the corrosion process in the air.

Original languageEnglish
Pages (from-to)137-141
Number of pages5
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume246
Issue number1
DOIs
Publication statusPublished - Oct 30 2000

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ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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