微纳米级针状金相试样的测试与分析

Test and analysis of needle-like metallographic sample in micro-nano scale

在金相分析过程中,微纳米级针状试样的镶嵌容易产生毛细现象,导致金相组织清晰度受限,无法准确地进行组织评价。对微纳米针状试样进行镶嵌磨抛,化学试剂侵蚀,然后分别置于乙醇溶液和丙酮溶液中进行超声处理,吹风机吹干。结果表明,由于丙酮溶液自身熔点低、挥发性强等特点,在常规微纳米金相镶嵌试样处理过程中加入丙酮溶液进行超声处理,可以有效去除镶嵌料与试样之间的残留溶液,降低毛细现象的产生,从而保证金相试样的清晰观察和组织的有效表征。

In the process of metallographic analysis,the insetting of needle-like sample in micro-nano scale will easily cause the capillary phenomenon,which leads to the limited resolution of metallographic structure.As a result,it is difficult to accurately evaluate the micro structure.The needle-like sample in micro-nano scale were treated by grinding and polishing,and then eroded with the chemical reagents.After that,the sample was placed in ethanol and acetone solution for ultrasonic treatment followed by drying with a hair dryer.The results showed that due to the low melting point and high volatility of acetone solution,the addition of ultrasonic treatment in acetone solution in the process of conventional micro-nano metallographic sample could effectively remove the residual solution between the mosaic material and the sample.The occurrence of capillary phenomenon was reduced,which could ensure the clear observation of metallographic sample as well as the effective characterization of microstructure.