Activity of strontium in liquid Sr-modified Al-7Si alloy

In the present study, the Henrian activity coefficient of strontium , dissolved in liquid Al-7Si alloy at 725-730°C has been determined to be in the order of 10 −2 , using the numerical thermodynamic analyses. By knowing the , formation of the compounds, Sr(OH) 2 and SrH 2 through the reaction of di...

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Bibliographic Details
Published in:International journal of cast metals research (Online) 2023-05, Vol.36 (1-3), p.1-8
Main Authors: Miresmaeili, S.M., Nami, B., Khoubrou, I.
Format: Article
Language:English
Subjects:
activity coefficient
Al-7si alloy
Sr-modification
standard gibbs free energy
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Summary:In the present study, the Henrian activity coefficient of strontium , dissolved in liquid Al-7Si alloy at 725-730°C has been determined to be in the order of 10 −2 , using the numerical thermodynamic analyses. By knowing the , formation of the compounds, Sr(OH) 2 and SrH 2 through the reaction of dissolved elements in Al-7Si alloy melt has been analysed. The results indicated that the free energy of the formation reaction of Sr(OH) 2 and SrH 2 in the alloy melt are positive at different temperatures, showing that these compounds may not be formed in the liquid aluminium alloys.
ISSN:1364-0461
1743-1336
DOI:10.1080/13640461.2023.2186567