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The phase relationships in the Al-Zr-Ho ternary system at 773 K

机译:Al-Zr-Ho三元体系在773 K时的相位关系

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摘要

The phase relationships in the Al-Zr-Ho ternary system at 773 K have been investigated in the whole compositional range. The existences of 13 binary compounds, i.e. Al_3Zr, Al_2Zr, Al_3Zr_2, AlZr, Al_3Zr_4, Al_2Zr_3, AlZr_2, AlZr_3, AlHo_2, Al_2Ho_3, AlHo, Al_2Ho and Al_3Ho have been confirmed. Al_(17)Ho_2 was not found at 773 K in this work. In addition, the ternary compound Al_(15)Ho_4Zr is confirmed. It has AuCu_3 structure and its lattice parameter is a = 0.4201 nm. The results show that the isothermal section consists of 17 single-phase regions, 32 two-phase regions and 16 three-phase regions. The solubility of Zr in Al_2Ho, AlHo and Ho is about 71 at.%, 6at.% and 12at.% Zr, respectively. No remarkable solid solubility could be found in the other compounds of the Al-Zr-Ho ternary system at 773 K.
机译:在整个组成范围内研究了Al-Zr-Ho三元体系在773 K时的相位关系。已经确认存在13种二元化合物,即Al_3Zr,Al_2Zr,Al_3Zr_2,AlZr,Al_3Zr_4,Al_2Zr_3,AlZr_2,AlZr_3,AlHo_2,Al_2Ho_3,AlHo,Al_2Ho和Al_3Ho。在这项工作中,在773 K处未发现Al_(17)Ho_2。另外,确认了三元化合物Al_(15)Ho_4Zr。它具有AuCu_3结构,其晶格参数为a = 0.4201 nm。结果表明,等温截面由17个单相区,32个两相区和16个三相区组成。 Zr在Al_2Ho,AlHo和Ho中的溶解度分别约为71at。%,6at。%和12at。%Zr。在773 K下,Al-Zr-Ho三元系的其他化合物中没有发现明显的固溶度。

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