摘要
光谱分析用标准样品在标准样品的发展中逐渐占主导地位,贵金属标准样品因成分偏析等因素使其标准样品难以制备。粉末冶金技术可制备出成分均匀、晶粒细小的合金,优质粉末的制备可为标准样品的制备提供原料基础。本文借助超声波清洗机对银合金进行振动,探究能否制得银合金粉末,并通过测试分析结果探究该方法能否达到细化晶粒的效果。实验分别从形态、粒径与晶粒、化学成分三个方面来进行对比说明,通过使用偏光显微镜、扫描电镜及能谱仪对银合金及银合金粉末进行观察测试,X射线荧光光谱仪对化学成分结果进行验证。使用超声波振动银合金制备银合金粉末,作为一种新型的制备银合金粉末的方法,超声功率达到600 W时,可以制备出平均粒径为9.54μm的粉末,其中超过70%的银合金粉末小于10μm。银合金的平均晶粒尺寸为22.5μm,说明超声波振动银合金具备细化晶粒的条件,结合形态和成分测试观察结果,说明通过制备粉末的方式既可以细化晶粒,也可以改善组织均匀性。
Standard samples for spectral analysis have gradually dominated the development of standard samples,and the standard samples of precious metals are difficult to be prepared due to compositional segregation and other factors.Powder metallurgy technology can prepare alloys with uniform composition,fine grain size,and the preparation of high-quality powder can provide raw material basis for the preparation of standard samples.With the help of ultrasonic cleaning machine on the silver alloy vibration,this study investigates whether the silver alloy powder can be produced,and explores whether the method can achieve the effect of grain refinement through the test analysis results.Experiments were carried out to compare and illustrate the three aspects of morphology,particle size and grain,and chemical composition.Polarizing microscope,scanning electron microscope and energy spectrometer were used to observe and test the silver alloy and silver alloy powder,X-ray fluorescence spectrometer was used for the verification of the chemical composition of the results.The use of ultrasonic vibration of silver alloys to prepare silver alloy powders is a new method of preparing silver alloy powders,which can produce powders with an average grain size of 9.54μm when the ultrasonic power reaches 600 W,of which more than 70%are less than 10μm.The average grain size of silver alloys is 22.5μm,which indicates that ultrasonic vibration of silver alloys has the conditions for grain refinement,and the combination of the morphology and composition of the test results show that it is possible to both refine the grains and improve the tissue homogeneity by preparing the powder.
作者
黄钰静
李举子
李浩东
张楚婷
HUANG Yujing;LI Juzi;LI Haodong;ZHANG Chuting(Gemmological Institute,China University of Geosciences,Wuhan 430074,China;Hubei Gems and Jewelry Engineering Technology Research Center,Wuhan 430074,China)
基金
中国地质大学(武汉)珠宝检测技术创新中心项目(项目编号CIGTXM-04-S202117)。
关键词
超声波
银合金粉末
偏析
标准样品
细化晶粒
ultrasound
silver alloy powder
polarization
standard sample
grain refinement
