Viscosity of Ga-rich alloys in the Ga-In-Sn system

• Published in: Journal of alloys and compounds Vol. 789; pp. 66 - 70
• Main Authors: Filippov, V.V., Belozerova, A.A., Shunyaev, K. Yu, Gelchinski, B.R.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.06.2019; Elsevier BV
• Subjects: Alloy systems; Ga-In-Sn alloys; Gallium base alloys; Liquid alloys; Liquidus; Oscillating cup method; Structure factor; Temperature; Temperature dependence; Variations; Viscosity; Viscosity; Oscillating cup method; Ga-In-Sn alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.03.107

The viscosity of Ga-In-Sn liquid alloys has been measured from liquidus temperature to 1200 K in the Ga-rich corner (content of gallium above 71 at. %) using an oscillating cup viscometer. The temperature dependence of the viscosity of the investigated alloys is well described by the Arrhenius law. Isotherms of the viscosity for Ga-In-Sn liquid alloys in the Ga-rich corner can be represented as a linear dependence on the gallium content. The viscosity of the investigated alloys near the liquidus temperature has a positive deviation from the ideal value. These alloys behave as ideal solutions at higher temperatures. As the comparison of existing phenomenological models describing the viscosity as a function of composition to the experimental data is unsatisfactory, a new model for the viscosity has been developed in the present work using the concentration-concentration fluctuations structure factor in the long-wavelength limit. The agreement between the model calculation and experimental data for Ga-based alloys is excellent. •The viscosity of Ga-In-Sn melts was measured up to 1200 K in the Ga-rich corner.•The measurement was carrying out using the oscillating cup viscometer.•Viscosity isotherms of the melts have a linear dependence on the Ga content.•An improved model for calculating viscosity has been developed.•This model exactly describes the viscosity of Ga-based eutectic systems.