摘要
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.
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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第9期6080-6085,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:50571052)资助的课题~~
关键词
电阻率
电磁感应
液态金属
结构转变
electrical resistivity
electromagnetic induction
liquid metal
structure transition
