成都市博物院几件院藏青铜兵器的分析研究

为了解巴蜀青铜兵器的制作技术及表面斑纹形成机理，采用金相显微镜分析，扫描电镜及能谱仪对成都市博物院的几件带斑纹的馆藏青铜兵器进行了分析。结果表明，两件截面样品均为青铜铸造组织，锡含量平均为11％。三件器物表面斑纹层均含锡和铜并具有一定抗氧化作用。斑纹工艺可分为二类：剑周99-1极可能为直接铸出凸凹不平的剑体，在凸起部位涂高锡合金膏剂，加热处理后得到。另一类可能先直接铸出金属基体，在欲成斑处涂抹合金膏剂或纯锡，加热处理打磨得到。分析结果可为深入研究巴蜀青铜兵器提供参考。

Study on bronze weapons in Chengdu Museum

Sichuan Basin provides lots of bronzes referring to late Zhou period with special patch. Four bronzeweapons in Chengdu Museum were studied by scanning electron microscopy and metallography. The metallographic analyses of 2 crosssection samples indicated a cast structure. The mean percentage of tin is 11%. Experimental work showed that patch region mainly made up of tin and copper have oxidation resistance. The surface crafts of patch are initiative classified and presumed. There are two methods to produce the patch on the surface of the three bronzeweapons. One method is to cast metal out of flatness, then plating paste of hightin alloy on the bulge of the metal. Second method is to cast leveling metal, then plating paste or tin coating on the site where silver patch should appear.