片状钽粉径厚比测试方法研究

Research on Test Method for radius-to-thickness ratio of Flake Tantalum Powder

本文通过构造片状钽粉模型,建立了片状型粉末的数学模型和测试模型,并确定了片状钽粉长度、厚度及径厚比测试方法。测量前,片状钽粉先经分散处理,然后金相镶嵌并切片磨削。利用光学显微镜从水平截面测量长度的平均值,从垂直截面测量厚度的平均值,计算得出片状钽粉的径厚比,并对所得测试数据进行数理统计并进行修正,得出片状钽粉的最终径厚比。研究表明:该测试方法可以方便测试片状钽粉的平均长度、厚度及径厚比。当测量颗粒数达到200个以上时,测试数据趋于稳定,具有良好的重现性和较小的误差。

The mathematical model and test model of flake tantalum powder were established by constructing the model of the flake tantalum powder, and the test methods for the length, thickness and radius-to-thickness ratio of the flake tantalum powder were determined. The flake tantalum powder was firstly dispersed before measurement, then metallographic mosaic and slice grinding were carried out. The average value of the length on horizontal section and the average value of the thickness on vertical section were measured by optical microscope, and the radius-to-thickness ratio of the flake tantalum powder was calculated. The test data was statistically analyzed and corrected, and the ultimate radius-to-thickness ratio of the flake tantalum powder was obtained. The results show that the test method is convenient to test the average length,thickness and radius-to-thickness ratio of the flake tantalum powder. When the number of particles measured is over 200,the test data tends to be stable with good reproducibility and smaller deviation.