Viscosity of aluminum–copper melts

Thermodynamic and Structural Study of the Copper-Aluminum System by the Electrochemical Method Using a Copper-Selective Beta″ Alumina Membrane

“…The source of the peak in viscosity near 10 to 25 mol% Cu is not readily apparent, but could suggest the presence of other associates, emphasizing the need for dedicated experimental research surrounding the structure of the liquid phase. Further research would aid in resolving discrepancy between Konstantinova [22] and Schick [13] in their reported composition of the aluminium-rich viscosity peak. Nevertheless, insight into liquid ordering is confirmed as being possible through electronic entropy of mixing.…”

“…Cuβ"Al 2 O 3 represents a strong candidate for sensing applications in copper-aluminium alloys due to its electrochemically-predictable behavior with copper-aluminum melts, ease in synthesis and machining, and stability under air and at temperatures inherent to liquid metal processing. , conductivity [63], and estimated Hall mobility Figure 18: Comparison of experimental viscosities [13,22] and calculated electronic entropy of mixing at 1373 K (1100 °C). All curves are normalized to their maximum value Figure 19: Viscosity calculated from electrochemical potential data at 1373 K (1100°C) using Kozlov and Shick-Brillo models, compared to experimental data [13,22].…”

“…Indeed, despite the prevalence of copper-aluminium alloys in industrial applications, liquid phase phenomena remain uncertain starting from inconsistencies in models for copperaluminium thermodynamics [8][9][10][11][12][13][14] and melt structure [15][16][17][18] . In addition, while physical properties such as density, viscosity, and surface tension of copper-aluminium melts have received experimental attention [13,[19][20][21][22] , such quantities are difficult to measure accurately for molten aluminium alloys [19] and limited effort is found to relate these properties to accurate experimental thermodynamics of mixing data. While molecular dynamics simulations [15][16][17][18][23][24][25][26] have attempted to elucidate the relation between thermodynamic, structural, and physical properties for the copper-aluminium system, the efficacy of available computational approaches is hindered by a lack of experimental data for comparison.…”

“…Another relevant viscosity model is the Schick-Brillo model [13] , originally derived from CALPHAD models of the copper-aluminium system published at the time, which assumed excess entropic effects were minimal. and of the pure end members are determined from the viscous flow activation energies and pre-exponentials calculated from experimental data [22] using fits to Eqn (12). and for the Schick-Brillo model can then be calculated using the following equations [13] :…”

Polymer concentration detection method based on fluorescent polymer to evaluate its retention and percolation

“…For instance, T. Konstantin ova's work indicates that the participation of the dyes does not affect the copolymerization process and does not exert considerable influence on the properties of the polymer obtained. 28 Fluorescent polyacrylamide (PAM) polymers have been extensively used, such as water treatment process. [29][30][31][32][33] Copolymerization, a widely applied method, is a good way to prepare fluorescent polymer.…”