This paper reviews the recent development of fabrication methods of porous metals with open-channels. The open-channel metals are fabricated through powder sintering or solidification technique. The template wires are embedded in the sintered or solidified metals, such as aluminum, copper, titanium and its alloys, which are then removed by chemical dissolution or extraction methods. The hole size, hole length and porosity are uniquely controlled by thickness, length and number of template metallic wires, respectively. The pore size ranges from 102 to several 103 μm in diameter. The open-channel metals are characterized by a large aspect ratio of the length to the diameter of the holes in metals. Furthermore, the techniques can fabricate spiral and V-shaped pores in metals. Feasibility and usefulness of each fabrication method are discussed. The methodology for producing the open-channel metals is expected to provide expanded opportunities for application technologies such as functional materials like heat sinks and sound absorbers and light-weight structural materials.

本文综述了具有开放通道的多孔金属制造方法的最新进展。明渠金属是通过粉末烧结或凝固技术制造的。模板线被嵌入到烧结或凝固的金属中，例如铝，铜，钛及其合金，然后通过化学溶解或萃取方法将其去除。孔的大小，孔的长度和孔隙率分别由模板金属线的厚度，长度和数量唯一控制。孔径范围从10 2到几个10 3直径μm。明渠金属的特征在于金属中孔的长度与直径的高深宽比。此外，该技术可以在金属中制造螺旋形和V形孔。讨论了每种制造方法的可行性和实用性。预计用于生产明渠金属的方法学将为诸如散热片和吸声器等功能材料以及轻质结构材料等应用技术提供更多的机会。