The electrical resistivity and thermal conductivity as functions of temperature, for an equiatomic Fe–Ni system are studied. The samples were obtained from nickel and iron powders by a 10 min electroconsolidation at a temperature of 1100 °C, pressure 35 MPa, and current ∼5 kA, and studied in the range of 4.2–300 K. It was found that the electrical and thermal conductivity of the electroconsolidated sample is significantly higher than that of samples with the same composition, obtained by melting. It was revealed that in the investigated range of 4.2–300 K, an electroconsolidated sample’s resistivity as a function of temperature is determined by electrons scattering by defects and phonons, and the scattering of electrons by phonons can be approximated with high accuracy by the Bloch–Gruneisen–Wilson formula.

中文翻译：

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FeNi在低温下的导电性和导热性

研究了等原子 Fe-Ni 系统的电阻率和热导率与温度的函数关系。在 1100 °C、35 MPa 的压力和 5 kA 的电流下，通过 10 分钟的电固结从镍和铁粉中获得样品，并在 4.2-300 K 的范围内进行研究。发现电和电固结样品的热导率显着高于熔融获得的相同成分样品的热导率。结果表明，在 4.2-300 K 的研究范围内，作为温度函数的电固结样品的电阻率由缺陷和声子的电子散射决定，声子对电子的散射可以通过 Bloch-格鲁尼森-威尔逊公式。