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激光清除石质文物表面污染物

Laser Cleaning of Contaminations on the Surface of Stone Relics

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摘要

在文物保护领域中,石质文物表面的污染物影响文物美观,更威胁文物保存,因而急需开展文物清洗技术研究以解决这一问题。激光清洗技术与其他清洗方法(化学清洗和微粒子喷射等)相比,具有无损、去污能力强、精确和环保等特点。利用激光清洗技术清除石质文物表面污染物。实验研究了砂岩在激光辐照下的损伤,并结合理论计算,得到砂岩在脉冲激光(波长为1064 nm)辐照下,10次脉冲的激光诱导损伤阈值为73.5 mJ,理论与实验值基本吻合。在激光清除砂岩表面墨迹污染物实验中,得到了激光清洗所需的最佳方式和参数。在此基础上,到四川绵阳碧水寺进行现场实验,结果表明激光能安全有效去除烟熏污染物。

Abstract

In the fields of cultural relic protection, the diseases on the surface of stone relics affect the conservation and artistic quality of relics. The cleaning methods must be investigated to solve the problem. Compared with the conventional cleaning methods (e.g., chemistry cleaning and sand blasting), laser cleaning is characterized by cleaning objects without damage, strong decontaminaton ability, precise removal, avoiding pollution environments. In the paper, laser cleaning is used for removing the contaminations on the surface of stone relics. Firstly, laser induced damage experiments are carried out. The results show that the laser induced damage threshold of the sandstones is about 73.5 mJ for 1064 nm laser after 10 laser pulses. Meanwhile, the finite element analysis software is used to calculate the temperature and the stress of the sandstones under the laser irradiation. The simulated results are consistent with the experimental ones. The optimal methods and laser parameters are achieved in the laboratory experiments for removal of the ink contamination. The experiments of Bishui temple located in Sichuan province indicate that the laser cleaning is safe and effective for the removal of black smudges.

Newport宣传-MKS新实验室计划
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中图分类号:TN249

DOI:10.3788/cjl201340.0903005

所属栏目:激光制造

责任编辑:宋梅梅  信息反馈

基金项目:国家科技支撑计划(2009BAJ53B05-3),“十一五”科技支撑项目

收稿日期:2013-03-01

修改稿日期:2013-04-15

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作者单位    点击查看

叶亚云:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
齐扬:中国地质大学(武汉)工程学院, 湖北 武汉 430074砖石质文物保护国家文物局重点科研基地, 陕西 西安 710075
秦朗:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
蒋勇:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
肖凯博:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
王海军:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
栾晓宇:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
程晓锋:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
袁晓东:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900

联系人作者:叶亚云(yeyayun8617@163.com)

备注:叶亚云(1986—),女,硕士,助理研究员,主要从事激光清洗技术方面的研究。

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