显微CT技术用于隋唐礼冠腐蚀饰件的结构研究

Application of micro-CT to study the structures of corroded ornaments of ritual crowns from the Sui and Tang Dynasties

X射线显微CT(X-ray micro-CT)是一种无损分析方法,在医学、材料学和地质学等领域得到了广泛的应用,并取得了良好的效果。为了了解隋唐冠饰的内部情况,探查冠饰内部的显微结构,获取饰件原始结构信息,本研究应用micro-CT技术,主要对西安东郊昆仑公司隋末唐初M2出土礼冠和马家沟唐代阎识微夫妇墓出土礼冠上的饰件结构进行CT检测,获得了高分辨率三维结构CT图像。图像清晰显示出饰件的结构:鎏金层、图案构件、饰件基体及图案构件与基体的连接部位。对于饰件结构的解读反映出饰件鎏金是饰件加工过程中的最后一道工序。该技术方法对古代制品,尤其是小件制品和劣化严重制品的结构、工艺研究及其保存状况评估,具有重要的现实意义。

X-ray micro-CT is a nondestructive analysis method,which has been widely used with good results in the fields of medicine,materials science and geology,etc.In our study,micro-CT technology was used to detect the microstructures of crown ornaments unearthed from the Kunlun Company M2 of the late Sui and early Tang Dynasties in the eastern suburb of Xi’an and from the tomb of Yan Shiwei and his wife of the Tang Dynasty at Majiagou,respectively.High-resolution three-dimensional structure CT images were obtained.They clearly show the structure of the ornaments such as the gilding layer and patterns as well as the connection methods.The interpretation of the decorative part structure shows that the gilding is the last procedure in the processing of ornaments and their accessories.It is concluded that micro-CT is of great practical significance to the study of the structure and processing of ancient products,especially small and badly deteriorated ones,as well as the evaluation of their preservation status.