Thermodynamic Properties of Al-Sc Alloys

被引：7

作者：

Shevchenko, M. O. ^{[1
]}

Kudin, V. G. ^{[2
]}

Berezutskii, V. V. ^{[1
]}

Ivanov, M. I. ^{[1
]}

Sudavtsova, V. S. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Frantsevich Inst Problems Mat Sci, Kiev, Ukraine

[2] Kiev Taras Shevchenko Natl Univ, Kiev, Ukraine

来源：

POWDER METALLURGY AND METAL CERAMICS | 2014年 / 53卷 / 3-4期

关键词：

calorimetry; thermodynamics; melts; aluminum; scandium; activities; phase diagram; STANDARD ENTHALPIES; TRANSITION-METALS; ALUMINUM; SCANDIUM;

D O I：

10.1007/s11106-014-9610-6

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mixing enthalpies of liquid Al-Sc binary alloys (0.62 < x(Sc) < 1) are determined by isoperibolic calorimetry at 1840 K. The thermodynamic properties of liquid Al-Sc alloys are described in the entire composition range using the ideal associated solution model. The thermodynamic activities of components in the Al-Sc melts demonstrate large negative deviations from the ideal behavior; the mixing enthalpies are characterized by significant exothermic effects. The minimum mixing enthalpy equals -32.7 +/- 2.2 kJ/mol at x(Sc) = 0.49. The experimental and literature data are compared.

引用

页码：243 / 249

页数：7

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