Thermodynamic assessment of the Cu–Ti–Zr system
Thermodynamic assessment of the Cu–Ti–Zr system
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DOI：
10.1016/s0925-8388(02)01035-6
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发表时间：
2003-03
影响因子：
6.2
通讯作者：
R. Arróyave;T. Eagar;L. Kaufman
中科院分区：
文献类型：
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作者：
R. Arróyave;T. Eagar;L. Kaufman
用Calphad方法计算了Cu-Ti-Zr系的平衡相关系。热力学模型参数的Ti-Zr，Cu-Ti和Cu-Zr系统，以前在文献中获得的，被使用。从实验信息中获得了新的热力学描述的三元相互作用参数的液体。此外，吉布斯生成能的三元相Cu2TiZr相的实验数据也进行了评估。提出了一种新的描述CuTi_2和CuZr_2相的方法。在此评估中获得的参数稍后用于计算选定的等温截面和该系统在整个组成范围内的投影液相线表面。该模型允许预测一系列涉及液相的不变点，在较低的温度比相邻的二元共晶。
Equilibrium phase relations in the Cu–Ti–Zr system are calculated using the Calphad approach. Thermodynamic model parameters for the Ti–Zr, Cu–Ti and Cu–Zr systems, previously obtained in the literature, are used. New thermodynamic descriptions for the ternary interaction parameters of the liquid are obtained from experimental information. Additionally, the Gibbs energy of formation for the ternary phase Cu2TiZr phase is also assessed from experimental data. A new description of the CuTi2and CuZr2phases, treated as single phases, is developed. The parameters obtained in this assessment are later used for the calculation of selected isothermal sections and the projected liquidus surface of this system over the entire composition range. This model allows the prediction of a series of invariant points involving the liquid phase, at lower temperatures than neighboring binary eutectics.