Phase Equilibria at 500 °C of the Mg-Gd-La System

Xu, Honghui; Zhang, Fan; Huang, Yangbin; Li, Na; Li, Jing; Zhou, Tao

doi:10.1007/s11669-015-0400-8

Cited by 3 publications

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“…[12] The present work is to determine the phase equilibria at 500°C of the Mg-Gd-Ce system within the framework of a longterm project for investigating the phase equilibria in the Mg-RE1-RE2 systems. [13][14][15] The temperature of 500°C is very near the solution heat treatment temperature for the aged Mg -Gd based alloys and there occurs no liquid phase at this temperature.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibria of the Mg-Gd-Ce System at 500 °C

Zhou

Chen³

et al. 2021

J. Phase Equilib. Diffus.

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The phase equilibria of the Mg-Gd-Ce system at 500°C were investigated by means of the electron probe microanalysis (EPMA) and x-ray diffraction (XRD) on equilibrated alloys. The existence of the so-called normal tetragonal CeMg 12 (I) and long-range ordered CeMg 12 (II) was confirmed in the present work. The following five three-phase equilibria were well determined: ( 1) (Mg) ? CeMg 12 (-I) ? Ce 5 Mg 41 , (2) (Mg) ? Ce 5 Mg 41 ? GdMg 5 , (3) Ce 5-Mg 41 ? GdMg 5 ? (Ce,Gd)Mg 3 , (4) (Ce,Gd)Mg 3 ? GdMg 2 ? (Ce,Gd)Mg and (5) (Ce,Gd)Mg ? (dCe) ?(bCe). The solubility of Ce in GdMg 5 and in GdMg 2 was measured to be 7.8 and 8.7 at.% Ce, respectively. The solubility of Gd in CeMg 12 (I), in Ce 5 Mg 41 and in (dCe) were measured to be 1.0, 4.6 and 2.4 at.% Gd, respectively. Two continuous series of solid solutions form between GdMg 3 and CeMg 3 , and between GdMg and CeMg. The overall isothermal section at 500°C was constructed based on the present data with a few extrapolations.

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