<論文>熔融金屬の流動性に關する研究
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概要
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Fluidity tests have been carried out with a specially-shaped crucible having a small pipe at the bottom. If the ratio of the time (t_0) required to flow out the unit volume of water at 20℃ through the pipe and the time (t) for molten metal is defined as "Flowing degree, " then Flowing degree K=t_0/t. Flowing degrees of mercury, tin, bismuth, lead, etc., at various temperatures have been measured with the hard-glass crucible. Every result obtained is larger than 1,viz., more fluid than water at 20℃, and the figure increases as the temperature rises. The effect of fine silicon particles on the flowing degree of aqueous zinc iodide solution having the same specific gravity as that of silicon has been observed by suspending silicon particles in it. Up to about 15 per cent of silicon, the flowing degree decreases gradually as the silicon content increases. At about 25 per cent of silicon there is a critical concentration at which the flowing degree decreases rapidly, and the coarser the particle size, the higher is the critical concentration of silicon. Ammonia and carbon dioxide decrease the flowing degree of water, and the higher the gas content, the lower is the flowing degree.
- 東北大学の論文
- 1950-09-12