Temperature dependence analysis of thermal conductivity was carried out for series of aluminum alloys with 1% Fe (mass%) and different content of silicon starting from 0% to 6% (mass%). It is shown that the best alloy for heat exchange applications is alloy with 4% of silicon (mass%). Temperature dependence of thermal conductivity shows the strong decreasing character for silicon-alloyed samples in comparison to pure aluminum.

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We have studied the temperature dependence of the thermal conductivity of a series of experimentally obtained aluminum-silicon alloys with different silicon addition and additional iron content of 1 % by weight. The article shows how the change in the silicon content affects the thermal properties of the experimentally obtained alloys at room temperature. Also, the article describes the character of the change in thermal conductivity when the samples are heated up to 150 °C. Based on the obtained data, we con clude that the alloy containing 4 % silicon by weight is the most prospective for usage as a material for solving heat transfer problems.

Metallographic analysis and thermal conductivity analysis of series of light aluminum alloys with silicon content from 0 to 12 % (by weight) and additionally alloyed with iron 1 % (by weight) were carried out. It is shown that with an increase in the silicon content in the alloy above 4–6 % (by weight), the size of silicon crystals increases significantly with a simultaneous increase in the values of thermal conductivity. The article assesses the effect of iron on thermophysical properties and shows the correlation of thermal conductivity at different temperatures with the morphology of silicon in alloys with silicon content from 0 to 12 % (by weight) and additionally alloyed with iron 1 % (by weight). It is shown that alloy with a silicon content of 4 % by weight has a balanced reserve of thermophysical properties due to the structural features of the morphology of the components.