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利用飞行时间法中子衍射技术(time of flight neutron diffraction)对3枚陕西出土的宋代铁钱进行了无损的相分析,采用英国卢瑟福实验室的高分辨率中子衍射仪GEM(General Materials Diffractometer),定量地揭示了铁钱的相组成、合金成分与主要锈蚀产物的成分。分析结果表明铁钱的主要物相为铁素体、渗碳体(还含有Fe3P),主要锈蚀产物为棕黄色针铁矿(α-FeOOH),没有发现铁素体晶粒的织构化,表明铁钱系铸造而成。中子衍射这种完全无损且量化的物理实验技术在中国文化遗产的科学分析与保护研究中具有广阔的应用前景。
The time-of-flight neutron diffraction was used to perform a non-destructive phase analysis of three iron mines in the Song Dynasty unearthed in Shaanxi Province. The high resolution neutron diffractometer GEM (General Materials) Diffractometer), quantitatively reveal the phase composition of iron money, alloy composition and the composition of the main rust products. The results show that the main phase of iron money is ferrite, cementite (also contains Fe3P), the main rust product is brown yellow goethite (α-FeOOH), did not find the ferrite grain texture, That the iron money is cast. Neutron diffraction, a completely non-destructive and quantitative physical experiment technology, has a broad application prospect in the scientific analysis and protection of Chinese cultural heritage.