Temperature and time dependences of the viscosity of InBi100 – хPbх melts (where х = 0, 19, 40, 60, 80, 100 at %) have been studied by the method of damped torsional oscillations. Intermediate compositions of this system have been studied for the first time. It has been demonstrated that the viscosity and the oscillation period curves for InBi–Pb melts containing up to 40 at % Pb measured in the heating and cooling modes are coincident and monotonic. In the InBi40Pb60 melt, the hysteresis of the viscosity and oscillation period of the suspension system with the melt is observed only in the first heating–cooling cycle, and in InBi20Pb80, after the first heating–cooling cycle, the viscosity hysteresis changes sign from negative to positive. From the results of measurements of the time dependences of the viscosity of the InBi40Pb60 melt at a constant temperature, the relaxation time is determined, which decreases exponentially with increasing temperature. The activation energy of the melt homogenization process was found to be Ea = 83 kJ/mol. The relaxation time and activation energy of the homogenization process determined in this work significantly exceed the values obtained in the literature for other systems. The long relaxation time near the liquidus suggests that this nonequilibrium state in the InBi40Pb60 melt is metastable.

中文翻译：

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InBi-Pb 熔体粘度的温度和时间依赖性

InBi100 – хPbх 熔体（其中 х = 0, 19, 40, 60, 80, 100 at %）粘度的温度和时间依赖性已通过阻尼扭转振荡方法进行了研究。首次研究了该系统的中间成分。已经证明，在加热和冷却模式下测得的含有高达 40 at% Pb 的 InBi-Pb 熔体的粘度和振荡周期曲线是一致且单调的。在 InBi40Pb60 熔体中，悬浮体系与熔体的粘度和振荡周期的滞后仅在第一次加热-冷却循环中观察到，而在 InBi20Pb80 中，在第一次加热-冷却循环后，粘度滞后变化符号为负到积极。根据恒定温度下 InBi40Pb60 熔体粘度随时间变化的测量结果，确定弛豫时间，弛豫时间随温度升高呈指数下降。发现熔体均化过程的活化能为 Ea = 83 kJ/mol。在这项工作中确定的均化过程的弛豫时间和活化能显着超过了其他系统文献中获得的值。液相线附近的长弛豫时间表明 InBi40Pb60 熔体中的这种非平衡状态是亚稳态的。在这项工作中确定的均化过程的弛豫时间和活化能显着超过了其他系统文献中获得的值。液相线附近的长弛豫时间表明 InBi40Pb60 熔体中的这种非平衡状态是亚稳态的。在这项工作中确定的均化过程的弛豫时间和活化能显着超过了其他系统文献中获得的值。液相线附近的长弛豫时间表明 InBi40Pb60 熔体中的这种非平衡状态是亚稳态的。