Thermodynamic Application of Predicting the Effect of Trace Element of Ag on Reinforced In Situ Particles in Al-Cu/TiB2 Composites

Di Er Yu; Zhi Yi Liu; Yan Xia Gu; Lin Yan Xia; Yun Dong Zhou; Li Wen

doi:10.4028/www.scientific.net/AMR.476-478.547

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Thermodynamic Application of Predicting the Effect of Trace Element of Ag on Reinforced In Situ Particles in Al-Cu/TiB₂ Composites

Abstract:

Using the Wilson equation and an extended Miedema model, the thermodynamic effect of silver on the stability of reinforced particles in the Al and Al-Cu matrix were evaluated. The formation of Al₃Ti, AlB₂, and TiB₂ phases are promoted with the addition of silver atoms in Al matrix. Minimum values of excess free energy of reinforced particles were found in the Al-Cu-Ti-B-Ag system. Evidently, Low content of silver atoms actually has the profound effect in promoting the reinforced particles in Al-Cu matrix.