Investigation of the time and temperature dependence of thermoelectric power and electrical resistance of the solid and liquid phases of the AK12M2Mg alloy
Abstract:
The paper describes the developed and realized method of measuring the complex of structure-sensitive properties of silumines. This method allows in real time, simultaneously obtaining thermographic curves and measuring TEDS and electrical resistance of the studied samples in a wide temperature range, including melting temperature and melt heating. Experimental data of measuring TEDS and electrical resistance of silumin AK12M2Mg as a function of time and temperature are presented. The analysis of the obtained results allows us to state that at the transition from crystal to melt the existing theories of charge transfer, which are the basis of the nature of TEDS and electrical resistance, are not able to describe their behavior as a function of time and temperature. According to the presented experimental data, the dependences of TEDS and electrical resistance on the heating time and temperature of the sample during its melting and crystallization are different. This behavior of these properties is difficult to relate to the existing models of liquid metal.
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