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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: Brass products in the coronet excavated from an M2-numbered Sui-Tang-dynasty tomb situated in Kun Lun Company in Xi'an, Shaanxi

Fig. 4

Optical micrographs and SEM images showing the cross-sectional metallographic structure of S-1 sample. a The structure consisting of α-isometric single crystals with twinned grains. b Grains at the edge filled with numerous slip lines, indicating that the sample has undergone multiple mechanical treatments. c Lead particles and lead sulfide (PbS). d Slip lines

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