Liquid phase separation, solidification and phase transformations of Gd–Ti and Gd–Ti–Al–Cu alloys
Source abstract
Abstract
Abstract Phase equilibria of the quaternary Gd–Ti–Al–Cu system have been studied with particular respect to solidification and phase separation phenomena in metallic glasses. Along the section Gd 55− x Ti x Al 25 Cu 20 the primary solidifying phase changes from Gd 2 CuAl ( x =0) toward α-Ti ( x ≥10) with rising Ti-fraction x . This is accompanied by an upturn of the liquidus temperature from T L =745 °C to T L >1100 °C. The miscibility gap predicted from thermodynamic calculations for Gd 55− x Ti x Al 25 Cu 20 melts at intermediate Ti-fractions was not verified experimentally. Unlike binary Gd–Ti melts, levitated Gd–Ti–Al–Cu droplets do not exhibit liquid phase separation features after quenching from different holding temperatures, even at high melt undercooling up to 200 K prior to solidification.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Quasicrystal Structures and Properties · Magnetic Properties of Alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (17)
Show source-provided references
1. Stabilization of metallic supercooled liquid and bulk amorphous alloys10.1016/S1359-6454(99)00300-6 ↗
2. In situ formed two-phase metallic glass with surface fractal microstructure10.1016/j.actamat.2004.01.036 ↗
3. In situ formation of two amorphous phases by liquid phase separation in Y–Ti–Al–Co alloy10.1063/1.1842360 ↗
4. Microstructure and thermal behavior of two-phase amorphous Ni–Nb–Y alloy10.1016/j.scriptamat.2005.04.018 ↗
5. Phase separation and improved plasticity by modulated heterogeneity in Cu–(Zr,Hf)–(Gd,Y)–Al metallic glasses10.1016/j.scriptamat.2007.03.008 ↗
6. Effect of elements with positive enthalpy of mixing on mechanical properties of bulk metallic glasses10.1016/j.jallcom.2010.12.054 ↗
7. The effect of Gd addition on the glass-forming ability of Cu–Zr–Al alloy10.1016/j.scriptamat.2006.03.052 ↗
8. Experimental and Thermodynamic Assessment of the Nb–Ni–Y System10.1007/s11669-007-9243-2 ↗
9. Mixing enthalpy of liquid phase calculated by Miedema′s scheme and approximated with sub-regular solution model for assessing forming ability of amorphous and glassy alloys10.1016/j.intermet.2010.06.003 ↗
10. Liquid phase separation in Gd–Ti and Gd–Zr melts10.1016/j.intermet.2010.02.030 ↗
11. Synthesis of metallic glass composites using phase separation phenomena10.1016/j.actamat.2009.12.034 ↗
12. Thermodynamic assessment of the Al–Cu–Gd system10.1016/j.calphad.2009.08.003 ↗
13. Aluminium–copper–titanium
14. Solidification kinetics and phase formation of undercooled eutectic Ni–Nb melts10.1016/S1359-6454(99)00167-6 ↗
15. P. Villars, L.D. Calvert, Pearson′s Handbook of Crystallographic Data for Intermetallic Phases, vol. 1, ASM International, Materials Park, OH, 1991, p. 783
16. Schmitz S, Thesis, TU Dresden 2012.
17. Solidification kinetics and microstructure evolution of undercooled phase separated Fe–Cu melts