Ag-Sn Alloys and dental amalgams: A119Sn Mössbauer, x-ray diffraction and scanning electron microscopy study

Details Ag-Sn Alloys and dental amalgams: A119Sn Mössbauer, x-ray diffraction and scanning electron microscopy study Ag-Sn Alloys and dental amalgams: A119Sn Mössbauer, x-ray diffraction and scanning electron microscopy study

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989hyint..45..381a&link_type=abstract

Hyperfine Interactions, Volume 45, Issue 1-4, pp. 381-388

Physics

1

Scientific paper

Examination has been made on aged and fresh Ag-Sn alloys and on commercial Cu-Ag-Sn dental alloys. Although x-ray diffractograms of aged Ag-Sn showed only λ Ag-Sn and free silver,119Sn Mössbauer spectra exhibited Sn(IV) oxide also. A low Debye temperature showed the oxide to be in intimate dynamical contact with the metallic matrix. Upon adding mercury, the phases λ1 Ag-Hg and η' Cu-Sn were observed in a commercial specimen. Conversion-electron spectra of a mercury-coated disk showed the presence of λ2 Sn-Hg and a distribution of line positions smaller than that for particulate amalgams. Internal oxidation was found to prevent amalgamation.

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