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本文用空球法对液态合金Al-4.5Cu的粘滞性进行了系统的实验研究。结果表明,温度这一参量并不能完全描述液态合金的粘滞性。液态合金Al-4.5 Cu在液相线温度以上其平衡粘滞性与Fulcher-Vogel规律(η=Aecp[B/(t-t_0)])符合甚佳;过热使合金的粘滞性减小了,过热后的粘滞性是非平衡粘滞性,在温度达到平衡的相同时间内,它与平衡粘滞性之间存在线性关系,这是粘滞性与合金的结构弛豫密切相关的缘故。本文还尝试用空球法对合金处于液固共存时的粘滞性进行考察,结果表明,空球法能对其最大粘滞性所对应的温度以及固相搭成稳定网状组织流动性完全丧失的温度作出判断。
In this paper, the viscosity of the liquid alloy Al-4.5Cu was experimentally studied by the spheroid method. The results show that the temperature of this parameter does not fully describe the viscosity of the liquid alloy. The equilibrium viscosity of the liquid alloy Al-4.5 Cu above the liquidus temperature is in good agreement with the Fulcher-Vogel law (η = Aecp [B / (t-t_0)]); overheating reduces the viscosity of the alloy , The viscosity after overheating is the non-equilibrium viscosity, which has a linear relationship with the equilibrium viscosity at the same time when the temperature reaches the equilibrium, which is closely related to the structural relaxation of the alloy. In this paper, we also try to study the viscosity of the alloy in liquid-solid coexistence by using the air-sphere method. The results show that the air-sphere method can completely stabilize the temperature and solid phase of the maximal viscosity of the alloy. Loss of temperature to make judgments.