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Formation of a self-assembled Cu-γ-Al_2O_3 nanocomposite

机译:自组装Cu-γ-Al_2O_3纳米复合材料的形成

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We report here the formation of a novel 'self-assembled' three-dimensional nanocomposite consisting of uniformly sized, evenly spaced spherical Cu nanoparticles embedded within a polycrystalline γ-Al_2O_3 matrix. This was discovered serendipitously during the examination of an ion-beam-milled ZrO_2 specimen in a transmission electron microscope. This nanocomposite was deposited as a coating during ion-beam milling by the co-sputtering of Cu and Al from the ion-mill hardware in the presence of O. The mechanism by which this highly organized nanocomposite forms is discussed, together with broader implications of these types of metal-ceramic nanocomposite and the possibility of using sputter deposition as a generic method for making them.
机译:我们在这里报告了一种新型的“自组装”三维纳米复合材料的形成,该复合材料由嵌入多晶γ-Al_2O_3基质中的尺寸均匀,间距均匀的球形Cu纳米颗粒组成。这是在透射电子显微镜中检查离子束研磨的ZrO_2标本时偶然发现的。该纳米复合材料是在离子束铣削过程中通过在O存在下从离子磨机硬件中共同溅射Cu和Al沉积成涂层的。讨论了这种高度组织化的纳米复合物形式的机理,以及更广泛的含义。这些类型的金属陶瓷纳米复合材料以及使用溅射沉积作为制备它们的通用方法的可能性。

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