文物保护与考古科学2025，Vol.37Issue(5)：10-20,11.DOI:10.16334/j.cnki.cn31-1652/k.20241103422
西安东郊出土汉唐时期铜镜的显微结构及腐蚀特征研究
Microscopic structures and corrosion characteristics of Han and Tang bronze mirrors unearthed in the eastern suburb of Xi'an
摘要
Abstract
Seventeen bronze mirrors from the Han and Tang Dynasties unearthed in the eastern suburb of Xi'an were analyzed using metallographic microscopy,scanning electron microscopy-energy dispersive spectrometry and Raman spectrometry to study their microscopic structures and corrosion characteristics.The results show that while the Han and Tang mirrors differed in shape and size,their main alloy compositions were similar,consisting primarily of high-tin bronze.All of the mirrors exhibited as-cast microstructures with comparable micro-morphology.The microstructure was composed of the(α+δ)eutectoid and the α phase,appearing as irregular islands and bands.Variation in cooling rates resulted in differences in the metallographic structure of bronze mirrors.All the samples displayed a stratified corrosion structure consisting of a surface corrosion layer,oxide layer,free copper deposition layer,corrosion transition layer and the underlying alloy.Lead in the bronze mirrors was the first component to corrode,and the eutectoid phase was corroded prior to the α phase.Corrosion also led to significant increase in Sn and O contents.These corrosion characteristics correspond closely with those expected from long-term burial environments.The results provide valuable references for understanding the micro-and macro-corrosion characteristics of high-tin bronzes in different environments and established a scientific basis for the preservation and restoration of bronze mirrors.关键词
铜镜/汉唐时期/共析体/腐蚀特征Key words
Bronze mirror/Han and Tang Dynasties/Eutectoid phase/Corrosion characteristic分类
历史学引用本文复制引用
侯鲜婷,付文斌,卢轩,马珍珍,白璐..西安东郊出土汉唐时期铜镜的显微结构及腐蚀特征研究[J].文物保护与考古科学,2025,37(5):10-20,11.基金项目
陕西历史博物馆2021年度科研课题经费(GJ2021019)资助 （GJ2021019）
