Effects of calcium addition on the foamability of molten aluminum.
Effects of calcium addition on the foamability of molten aluminum.
复制标题
钙添加量对铝液发泡性的影响
DOI：
10.2464/jilm.37.42
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
S. Akiyama
中科院分区：
文献类型：
--
作者：
Hidetoshi Ueno;S. Akiyama
开发了一种用发泡技术生产多孔铝的新工艺。在该过程中，在粘度上升阶段之前加入钙的铝液被搅拌，以将氧化膜分散到熔体中。钙的加入促进了熔体的氧化，大大缩短了粘度上升的时间。加钙的另一个优点是用旋涡法使发泡剂在熔体中容易、快速地混合。这还可以减少所需的昂贵发泡剂，如TiH2和ZrH2，并利用经济的发泡剂，如火山灰(Shirasu)。熔体的粘度上升和发泡剂的混合只需要约0.4%的钙。熔体发泡的最佳粘度约为8.6cP。
A new process for producing porous aluminum by the foaming technique was developed. In the process, molten aluminum into which Ca has been added before the stage of viscosity rise is stirred to disperse oxide films into the melt. Adding Ca results in considerable shortening of the time for viscosity rise because of promoting oxidation of the melt. Another advantage of Ca addition includes that the foaming agent is mixed easily and quickly in the melt by the vortex method. This also allows to diminish a required amount of expensive foaming agents such as TiH2 and ZrH2 and to utilize economical foaming agents such as volcano ash (Shirasu). Only about 0.4%Ca is required both for viscosity rise of the melt and mixing of foaming agents. The optimum viscosity of the melt for foaming is about 8.6cP.