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利用回转振动粘度仪在液相线以上较大温度范围内,测量了In-55%Sb(质量分数)亚共晶合金熔体在不同的升降温过程中的粘度。实验结果表明,熔体经历的热历史对其粘度具有显著的影响。熔体在降温过程中的粘度高于升温过程中,在过热100℃后的降温过程中熔体的粘度较之无过热的降温过程中要低。在不同的热过程中,粘度发生转折变化的温度不同,在升温过程中,发生在850℃左右,在过热100℃和无过热的降温过程中,分别发生在750℃和650℃左右。熔体粘度的突变反映了熔体结构在相应温度的突然变化。
The viscosities of In-55% Sb (mass fraction) hypoeutectic alloy melt during different heating and cooling were measured by rotary vibrating viscometer over a large temperature range above the liquidus. Experimental results show that the thermal history experienced by the melt has a significant effect on its viscosity. The viscosity of the melt in the cooling process is higher than that in the heating process, and the viscosity of the melt in the cooling process after overheating at 100 ° C is lower than that in the non-overheating cooling process. In different thermal processes, the temperature at which the viscosity transition changes is different. During the heating process, it occurs at about 850 ° C, and occurs at temperatures of about 750 ° C and about 650 ° C, respectively, when it is overheated at 100 ° C and without overheating. The sudden change in melt viscosity reflects a sudden change in the melt structure at the corresponding temperature.