超声波作用对NH4Cl枝晶形态影响的研究
Influence of Ultrasonic Treatment on Morphology of NH4Cl Dendrite
金 焱， 毕学工
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作者单位：武汉科技大学 钢铁冶金及资源利用省部共建教育部重点实验室，湖北 武汉430081
中文关键字：超声波； 饱和NH4Cl溶液； 结晶； 枝晶
英文关键字：ultrasonic; saturated NH4Cl solution; crystallization; dendrite
中文摘要：研究了超声波功率和处理时间对饱和NH4Cl溶液结晶温度、晶粒度和二次枝晶的影响。实验中发现，在相同的结晶条件下，随着超声处理时间的延长，晶粒细化效应增强，结晶二次晶间距不断增大。同时，随着超声波功率的增加，对晶粒细化、二次晶间距的增大以及对二次晶根部的影响效应增强，但存在峰值。
英文摘要：The effects of ultrasonic power and ultrasonic treating time on crystallization temperature of the saturated NH4Cl solution, grain size and secondary dendrite were studied. In the experiments it is shown that in the same crystallizating conditions, with the extension of ultrasonic processing time, the grain refinement becomes more obvious, and the distance between secondary dendrites increases. At the same time, with the increase of ultrasonic power, the grain refines, the distance between the secondary dendrite increases, and the impulsion of dendrite root enhances, when it achieves a certain degree, the influence of ultrasonic power is the most obvious.