Measurement of viscosity, density and surface tension of metal melts
Measurement of viscosity, density and surface tension of metal melts
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金属熔体粘度、密度和表面张力的测量
DOI：
10.1002/srin.199701780
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Yongmao Zhou
中科院分区：
文献类型：
--
作者：
H. Friedrichs;Leonid Wladimirowitsch Ronkow;Yongmao Zhou
提出了一种使用气泡粘度计测量金属熔体粘度、表面张力和密度的改进程序。测量原理是基于熔体中气泡的上升速率与熔体粘度之间的关系。气泡上升速率是通过喷枪中的压力测量记录分离时刻以及通过视频胶片和图像处理系统记录气泡到达熔体表面的时刻来确定的。该程序经过测试，并通过对参考金属的比较测量确定其应用限制。在对参考金属进行测试后，测量了铜含量为 12.23 至 58.5% 的铝铜合金在 960 - 1465 K 温度范围内的粘度、密度和表面张力。研究了这些值与熔体温度和成分之间的关系，并导出了相应的近似公式。
A modified procedure for measuring viscosity, surface tension and density of metallic melts, using a gas bubble viscosimeter, is presented. The principle of measurement is based on the relation between rate of ascent of a gas bubble in the melt and the melt viscosity. The rate of bubble ascent is determined by registering the moment of detachment by pressure measurement in the lance and the moment of arrival of the bubble at the melt surface by video film and an image processing system. The procedure is tested and the limits of its application are determined by comparative measurements on reference metals. After tests on reference metals, measurements are taken of the viscosity, density and surface tension of Al-Cu alloys in the temperature range 960 - 1465 K with copper contents of 12.23 to 58.5%. The relationships between these values and temperature and composition of the melt are investigated, and corresponding approximation formulae derived.