Fabrication of Intermetallic Compound, Ni_3Al Using Interfacial Reaction

研究了熔融铝液渗入烧结镍制备金属间化合物Ni3Al的工艺。研究结果发表在《J.Japan Inst》杂志上。金属、材料科学与工程等专业。在气孔率为30%的烧结镍中加入熔融的Al-Ni合金，在不改变烧结镍的形状和尺寸的情况下形成Ni3Al。这个过程在1秒内完成。因此，该工艺可以作为制备Ni3Al的新工艺。这些现象一定是润湿过程之一。我们已经发表了许多论文将这些现象描述为反应润湿。固体镍与熔体铝之间的润湿现象，我们从反应润湿的角度在国际期刊上发表了许多论文。另一方面，利用Ni3Al/Al-Ni体系成功地实现了无界面反应的润湿现象。对于润湿现象，我们定义了平衡润湿。近年来，我们尝试用这种技术来制备Nb_3Al金属间化合物。此外，对于传质体系的模型，我们尝试用氯化钠/氢气-氯化钠体系来阐明传质对润湿现象的影响。

The fabrication process of intermetallic compound Ni_3Al using the infiltration of molten aluminum into sintered nickel been investigated. And the results were published in the J.Japan Inst. of Metals, Materials Science and Engineering and so on. By the infiltration of molten Al-Ni alloy into the sintered nickel having 30% porosity, Ni_3Al is formed without the change in the shape and size of sintered nickel. This process is accomplished within 1s. Therefore, this process can be the new fabrication process for Ni_3Al. These phenomena must be one of the wetting process.We have been published many papers which described these phenomena as a reactive wetting.The wetting phenomena between solid nickel and molten aluminum, we published many papers in international journals from the view point of reactive wetting. On the other hand, we succeeded the wetting phenomena without interfacial reaction using Ni_3Al/Al-Ni system. As for the wetting phenomena, we defined equilibrium wetting. In these days, we try to fabricate Nb_3Al intermetallic compound using this technique. Moreover, as for the model of mass transfer system, we try to make clear the influence of mass transfer on wetting phenomena using NaCl/H_2-NaCl system.