Study the Effect of Magnesium and Zinc Additions on Thermal Properties of Pure Aluminum
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Abstract
This research, a practical study was achieved to demonstrate the effect of adding
Magnesium and Zinc elements on the thermal properties of pure Aluminum. These
properties are: the quality thermal capacity (Cv), the thermal conductivity coefficient
(k), and the thermal diffusion coefficient ( ). Seven metal ingots were manufactured by
changing the percentages of adding Magnesium and Zinc on the pure Aluminum, and
these ratios were: (5%, 10%, 15%, 20%, 25%, 30%).
The obtained results showed that increasing the percentages of adding Magnesium and
Zinc to the pure Aluminum causes a decrease in the ingot density by (10.7%), a
decrease in the thermal conductivity coefficient by (8.1%), an increase in the quality
thermal capacity by (4.8%), as well as a decrease in the thermal diffusion coefficient by
(1.9%). As for Zinc, the density increases by (49.2%), as the density of Zinc
(7.13)kg/m3 is higher than the density of Aluminum (2.7) kg/m3, and higher than the
density of Magnesium (1.74) kg/m3, as well as decreasing the thermal specifications (Cv,
k, ).
During this study, it was found that the best addition is (30% Mg) to the pure
Aluminum, which gave the highest thermal properties (Cv, k, ). As for Zinc, its
addition to pure Aluminum led to deterioration of the thermal properties during all
ratios.
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