Formation enthalpy of intermetallic phases from Al-Fe system measured with solution calorimetric method
- 作者：W. Gą ; sior ; A. Dę ; bski ; nmdebski@imim-pan.krakow.pl ; Z. Moser
- 关键词：A. Aluminides ; miscellaneous ; B. Phase diagrams ; B. Phase identification ; B. Thermodynamic and thermochemical properties ; F. Calorimetry
- 刊名：Intermetallics
- 出版年：2012
- 期刊代码：36_09669795
- 类别：ms
- 出版时间：May, 2012
- 卷：24
- 期：Complete
- 页码：99-105
- 文件大小：789 K
摘要
The solution calorimetric method was used for the determination of the formation enthalpy of Alb>2 b>Fe and Alb>5 b>Feb>2 b> intermetallic phases. The phases were prepared in a very pure Ar atmosphere by melting the calculated amounts of Al and Fe in alumina crucibles. Their crystal structure was confirmed with the X-ray diffraction method. A very low amount of Alb>5 b>Feb>2 b> phase was found in the Alb>2 b>Fe phase. The calorimetric experiments were carried out using an Al bath at temperature 1271聽K. The formation enthalpies of the Alb>5 b>Feb>2 b> and Alb>2 b>Fe phases obtained at room temperature were聽鈭?0.5 and聽鈭?7.8聽kJ/mol of atoms, respectively.