Thermodynamic description of the Cu-Al-Sn system in the copper-rich corner

Abstract

Thermodynamic optimization of the Cu-Al-Sn system is made using classical thermodynamic models for describing the properties of the individual phases of the system. The optimization is limited to the copper-rich corner of the system, the gamma phase of the Cu-Al and Cu-Sn systems being the remotest phase included in the analysis. The data of the pure components and the binary systems are taken from the previously assessed Scientific Group Thermodata Europe (SGTE)-compatible descriptions, although a slight reoptimization of data is first made for the bcc, fcc, and gamma phases of the Cu-Al system and for the liquid and gamma phases of the Cu-Sn system. Next, ternary thermodynamic data are optimized for the ternary Cu-Al-Sn system using the experimental phaseequilibrium data of the literature. The results of the optimization are presented by comparing the original, experimental data with the calculations, and reasonable agreement is demonstrated.

Knudsen effusion mass spectrometric determination of mixing thermodynamic data of liquid Al–Cu–Sn alloy

“…(6a) are also zero. In contrast, the binary L (2) CuSn data, obtained by Witusiewicz et al [10], Miettinen [12], and in this work using a multiple regression on Hultgren' s original data [11], are not zero (see Table 2). Therefore, an equation assuming a non-zero L (3) data must be derived.…”

“…[8][9][10][11][12]. Table 2 gives a comparison of the binary L-data taken from all of these sources while Fig.…”

“…AlSn in the COST 507 [8] database and in Miettinen' s paper [12], as well as L (3) CuSn in the COST 531 [9] database (see Table 2)) the expressions including the quantities in Eq. (6a) are also zero.…”

“…More recently, Schmidt and Tomiska [7] independently developed a similar mass spectrometric regression method not by using the RKM ternary L-parameters but by using the so called thermodynamic adoptive parameter series (TAP) for the description of the individual phases. Mixing thermodynamic data on the boundary binary systems (Al-Cu, Al-Sn and Cu-Sn) are available in several studies [8][9][10][11], whereas the data for Al-Cu-Sn is available only in Miettinen's work [12].…”

Surface Tension and its Temperature Coefficient of Liquid Sn-X (X=Ag, Cu) Alloys

“…6, the Gibbs excess free energies of various binary alloys are given. [56][57][58][59][60][61][62] It is found that liquid Sn-Ag and Sn-Cu have negative values.…”