Record details

Title
    Crystallographic aspects of intergranular failure of archaeological silver artefacts
Author
    Děd, Jiří
    Gärtnerová, Viera
    Haloda, Jakub
    Jäger, Aleš
    Lejček, Pavel
    Vaníčková, Jaroslava
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Surface and Interface Analysis
Vol./nr.
    Roč. 43, č. 8
Pages
    6
Year
    2011
Thesaurus term
    anisotropy, intergranular failure, localised corrosion, Roman silver artefacts, solute segregation, EBSD
Keyword
    Archaeological
    Artefacts
    Aspects
    Crystallographic
    Failure
    Intergranular
    Silver
Abstract (in english)
   Excavated archaeological silver objects often exhibit extended intergranular degradation. This failure is most probably caused by the localised corrosion of highly copper-segregated grain boundaries in case of a AgCu base alloy during burial for more than 1000 years in graves. Detailed electron backscatter diffraction (EBSD) analysis of individual grain boundaries showed that this corrosion degradation is controlled by the crystallography of the grain boundaries: exclusively, the general grain boundaries are prone to the corrosion while the special ones are not attacked at all. It is also deduced that the orientation of the grain boundary plane plays an important role in the selective corrosion attack.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014