Study On One Dimensional Nano-structure Of Cu-Zn-Al Alloy

Cu-Zn-Al alloy is a kind of Shape Memory Alloy with good performance. When we studied it, some novel one-dimensional alloy nano-structures looked like reticulation, branch and braid were obtained under normal temperature and pressure. After a mass of experiments, it was found that the alloy nano-structures would be attained when the annealed Cu-Zn-Al alloy was treated by mixed acid include HNO3,HCl,H3PO4,HAC. And it is necessary to be treated by erodent to obtain a great deal of fine nano-structures. The alloy nano-structures were characterized by TEM, XRD, EDX. There are two sorts of nano-structures. One is Cu-Zn-Al alloy nano-structure with diameter from 20 nm to 50nm and the longest length is micron dimension, its ingredients are Cu, Zn, Al and its structure is polycrystal, the other is novel Cu-Zn-Al alloy nano-structure with carbon element and its diameter is from 20 nm to 50nm , the longest length is micron dimension. The main elements of this novel alloy nano-structure are Cu and carbon , the structure is polycrystal.In the process of researching growth mechanics of alloy nano-structures, it was confirmed that quasi-fluid cell ,a kind of nonlinear oscillation phenomenon in the alloy was critical factor. According to the characters of quasi-fluid cell such as chaotic, self-organizing and similar with fluid, the questions about where the energy and atoms which composing alloy nano-structures come from, how the alloy nanotubes nucleate and why the atoms can grow directly could be explained reasonably. And the grow model of one dimensional alloy nano-structures were put forward in response to quasi-fluid state.