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非化学计量金属间化合物DO3型Fe3Al热力学性质研究

Study on the thermodynamic properties of nonstoichiometric intermetallic compounds Fe3Al with DO3 structure

中文摘要英文摘要

利用以CaF2单晶为固体电解质的电池电动势法(EMF)测定了720-850 K温度区间内(-) PtIr Al0.85Sn0.15, Na3AlF6Ca2FAlxFe1-x(x=0.23-0.33), Na3AlF6IrPt (+)电池电动势,进而计算了DO3型Fe3Al非化学计量金属间化合物均相范围内组元Al的热力学活度及Al的偏摩尔热力学性质 、 、 ,基于Gibbs-Duhem方程计算了DO3型Fe3Al中另一组元Fe的热力学活度和偏摩尔Gibbs自由能。计算了750 K时DO3型Fe3Al相中Al扩散的热力学因子。

he emf values of the cell (-) Pt.Ir.Al0.85Sn0.15, Na3AlF6.Ca2F.AlxFe1-x(x=0.23-0.33), Na3AlF6.Ir.Pt (+)were measured between 720 K and 847 K by the emf method using solid galvanic cells with a single-crystal CaF2 electrolyte. The Al activities in Fe3Al with DO3-ordered nonstoichiometric intermetallic compounds were derived. The partial molar thermodynamic properties of Al such as AlG.,AlH.,AlS. were calculated. The activities and partial molar Gibbs energies of Fe in the Fe-Al alloys were derived by Gibbs-Duhem equation. The thermodynamic factor in diffusion of aluminum in the Fe3Al phase at 750 K was calculated.

朱鸿民、袁文霞、乔芝郁、黄永章

冶金技术化学晶体学

电池电动势法aF2Fe3Al活度

EMF CaF2 Fe3Al Activity

朱鸿民,袁文霞,乔芝郁,黄永章.非化学计量金属间化合物DO3型Fe3Al热力学性质研究[EB/OL].(2006-03-20)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/200603-356.点此复制

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