Experimental determination of intermetallic phases, phase equilibria, and invariant reaction temperatures in the Fe-Zr system
Experimental determination of intermetallic phases, phase equilibria, and invariant reaction temperatures in the Fe-Zr system
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DOI：
10.1361/105497102770331172
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发表时间：
2002-12-01
期刊：
影响因子：
--
通讯作者：
Palm, M
中科院分区：
文献类型：
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作者：
Stein, F;Sauthoff, G;Palm, M
用差热分析（DTA）、电子探针分析（EPMA）、X射线衍射（XRD）和金相分析等方法重新测定了Fe-Zr二元系在整个成分范围内的相图。二元体系的稳定金属间相是立方和六方晶型的Fe 2 Zr Laves相和富Zr相FeZr 2和FeZr 3。虽然Laves相的立方多晶型物在化学计量的Fe 2 Zr组成下是稳定的结构，但Laves相的六方C36型多晶型物是在Zr浓度低至26.6原子%时发现的高温相。富Zr相FeZr 2和FeZr 3具有约0.5原子%的小均匀性范围。FeZr 2是一种高温相，在780至951 ℃之间稳定。FeZr 3在851摄氏度下包盖分解。经常报道的相Fe_（23）Zr_6（Fe_3 Zr）被发现不是二元系的平衡相。
The phase diagram of the binary Fe-Zr system was redetermined by differential thermal analysis (DTA), electron-probe microanalysis (EPMA), x-ray diffraction (XRD), and metallography in the whole range of compositions. The stable intermetallic phases of the binary system are the cubic and the hexagonal polymorphs of the Fe2Zr Laves phase and the Zr-rich phases FeZr2 and FeZr3. While the cubic polymorph of the Laves phase is the stable structure at the stoichiometric Fe2Zr composition, the hexagonal C36-type polymorph of the Laves phase is a high-temperature phase that is found at Zr concentrations as low as 26.6 at.%. The Zr-rich phases FeZr2 and FeZr3 have small homogeneity ranges of about 0.5 at.%. FeZr2 is a high-temperature phase, stable between 780 and 951 degreesC. FeZr3 decomposes peritectoidally at 851 degreesC. The frequently reported phase Fe23Zr6 (Fe3Zr) is found not to be an equilibrium phase of the binary system.