论文标题
短程顺序对Al-Mg熔体的粘度和结晶的影响
The Effect of short-range order on the viscosity and crystallization of Al-Mg melts
论文作者
论文摘要
在这项工作中，使用粘膜仪法和热分析的方法，研究了Al-Mg融化的超冷粘度的浓度变化，Mg含量为2.5至95 at。％％。结果表明，粘度的温度依赖性通过指数依赖性很好地描述。粘度的浓度依赖性不是单调的，并且反映了液相化学短距离顺序的变化。 Al-Mg熔体过冷的浓度依赖性取决于固化过程中形成的固相的类型，还反映了在20和80 at。％mg时液相中化学短距离顺序的最显着变化。浓度范围中的al-mg合金：0-10、40-50和90-100 at。％mg易于非平衡结晶，形成准整流器和固化，而无需中等金属间层。
In this work, using the methods of viscosimetry and thermal analysis, the concentration changes in the values of the supercooling viscosity of Al-Mg melts with Mg content from 2.5 to 95 at.% are studied. It is shown that the temperature dependences of viscosity are well described by an exponential dependence. The concentration dependence of viscosity is not monotonous and reflects a change in the chemical short-range order in the liquid phase. The concentration dependence of supercooling of Al-Mg melts is determined by the type of solid phase formed during solidification, and also reflects the most significant changes in the chemical short-range order in the liquid phase at 20 and 80 at.% Mg. Al-Mg alloys in the concentration ranges: 0-10, 40-50 and 90-100 at.% Mg are prone to non-equilibrium crystallization, the formation of quasi-eutectics and solidification without intermediate intermetallic phases.
