New investigation of phase equilibria in the system Al–Cu–Si

Abstract

Highlights► Isothermal sections at 500 and 700 °C investigated. ► Vertical sections (partial at 10 at.% Si, complete at 40 at.% Si) determined. ► Partial ternary reaction scheme (Scheil diagram) established. ► New ternary compound identified.

Morphology and Phase Formation During the Solidification of Al-Cu-Si and Al-Ag-Cu Ternary Eutectic Systems

“…Real ternary eutectics are much more complex and their structure generally fails to be describable by the Himemiya´s approach. In addition to that, extensive works were performed to describe the experimental behavior through the CALPHAD method for both systems [12][13][14][15][16][17] .…”

Stress-Assisted Thermal Diffusion Barrier Breakdown in Ion Beam Deposited Cu/W Nano-Multilayers on Si Substrate Observed by in Situ GISAXS and Transmission EDX

“…The particle was composed of 75 atomic % Cu and 25 atomic % Si, indicating the presence of the orthorhombic or tetragonal 43 η″-Cu 3 Si phase, while the presence of the η and η′ phases is unlikely due to the higher formation temperature required. 44 TEM images shown in Figure 5 b–d show the different stages of Cu 3 Si microparticle formation: Cu penetration across the W diffusion barrier into the Si substrate results in the precipitation of Cu 3 Si, leading to a significant volumetric expansion 45 as can be seen in Figure 5 b. A reason for the delayed diffusion of Cu into Si as compared to previously described diffusion toward the free sample surface can be found by looking at the thermal expansion coefficient mismatch between W and Si.…”

Determination of thermodynamic properties of aluminum based binary and ternary alloys

“…The composition of the alloy was chosen as Al-26.82 wt.% Cu-5.27 wt.% Si [12] to grow a single solid Al solution phase on the eutectic casting phase. The Al-26.82 wt.% Cu-5.27 wt.% Si alloy was prepared in a vacuum furnace by using Al, Cu and Si metals with 99.99, 99.9 and 99.999% purities, respectively.…”

“…Although a lot of research has been carried out on the AleCueSi non-eutectic alloy in the literature [8e10], only a few studies [11] have been done on ternary eutectic AleCueSi alloy systems. From the AleCueSi phase diagram [12], the eutectic composition of AleCueSi alloy is Al-26.82 wt.% Cu-5.27 wt.% Si and the eutectic temperature is 797 K. The eutectic phases of Al- 26.82 wt.% Cu-5.27 wt.% Si eutectic alloy are Al solution, Si and q(CuAl 2 ). The aim of this study is to evaluate some of the thermophysical properties of Al-26.82 wt.% Cu-5.27 wt.% Si ternary eutectic alloy such as the GibbseThomson coefficient, solideliquid interfacial energy, solidesolid interfacial energy, enthalpy of fusion, entropy of fusion, change of specific heats from liquid to solid and the electrical conductivity of solid phases at their melting temperatures.…”