电磁感应式液固态金属电阻率定性测量装置及应用

介绍了一种自主研制的非接触式电阻率测量装置，该装置基于电磁感应原理，可实现降温过程中金属从液态到固态各阶段电阻率的定性测量，为实时表征金属材料的结构变化提供了一种有效的测量工具.详细介绍了该装置的设计原理及其结构，同时利用该装置，测量了金属Zn，Sb以及过共晶Zn-70 wt.% Sb合金降温过程中电阻率随温度的变化情况，验证了该装置的可靠性.关键词：电阻率电磁感应液态金属结构转变

Design and application of a device based on electromagnetic induction principle for electrical resistivity qualitative measurement of liquid and solid metals

A non-contact measuring device for electrical resistivity has been designed, which is based on electromagnetic induction principle. Using the device, the electrical resistivity of metals can be monitored during transition from liquid to solid state, which shows that the device is suitable for analysing the structure transition of metals and alloys during the cooling process.The design principle and construction of the device are detailedly described in this paper. The change of electrical resistivity of pure Zn and pure Sb, and hypereutectic Zn-70wt.%Sb alloy during cooling was measured by the device. The experiment results show that the device preforms well.