Key experiments and thermodynamic revision of the binary Al–Sr system

Key experiments and thermodynamic revision of the binary Al–Sr system
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二元AlâSr体系的关键实验和热力学修正

DOI:
10.1016/j.jallcom.2014.05.018
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发表时间:
2014
影响因子:
6.2
通讯作者:
R. Schmid- Fetzer
R. Schmid- Fetzer
中科院分区:
材料科学2区
文献类型:
--
作者:
S.-M. Liang;M. Engstler;V. Groten;J. Barrirero;F. Mücklich;A. Bührig-Polaczek;R. Schmid- Fetzer

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富铝 Al-Sr 相平衡是本研究的重点。通过仔细校准和控制的差示扫描量热 (DSC) 实验,确定 (Al)–SrAl4 共晶反应的温度为 655.6 °C。首次利用原子探针断层扫描确定Sr在640℃下在(Al)中的固溶度极限不高于45wt。百万分之一。通过使用基于选定的先前系统建模的 Calphad 方法合并这些新数据,对完整 Al-Sr 系统的热力学描述得到了改进。此外,对所有金属间相的描述进行了修改,以避免在元素熔化或转变温度下化合物的热容曲线上出现扭结点伪影,这是不物理的。新的模型显示了 Al-Sr 系统富铝一侧的显着改进,为开发多组分铝合金数据库奠定了坚实的基础。
The Al-rich Al–Sr phase equilibria are in the focus of this study. The temperature of the (Al)–SrAl4eutectic reaction is determined to be 655.6 °C by carefully calibrated and controlled differential scanning calorimetry (DSC) experiments. The solid solubility limit of Sr in (Al) at 640 °C is determined for the first time by using atom probe tomography to be not higher than 45 wt. ppm. The thermodynamic description of the complete Al–Sr system has been advanced by incorporation of these new data using the Calphad method based on a selected previous modeling of the system. In addition, the descriptions of all intermetallic phases were revised to avoid the artifact of kink point appearing on the heat capacity curves of the compounds at melting or transition temperatures of the elements, which is unphysical. The new modeling shows significant improvement on the Al-rich side of the Al–Sr system, forming a sound foundation for developing multicomponent Al-alloy database.
DOI: 10.1007/s11629-020-6573-6
发表时间: 1991
期刊: Zeitschrift Fur Metallkunde
影响因子: --
作者:
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通讯作者: K. Jacob
Al-Si 微观结构的修改 - Al-Si-Sr 相图,含量为 0–20 % Si 和 0–5.0 % Sr。
DOI: 10.1557/proc-19-411
发表时间: 1982
期刊: MRS Proceedings
影响因子: --
作者:
M. D. Hanna;A. Hellawell
通讯作者: A. Hellawell