泡沫铝冶金连接及其界面结构与力学性能研究

发布时间：2018-05-07 10:36

本文选题：泡沫铝 + 扩散连接　；参考：《材料导报》2017年08期

【摘要】：以Zn-10Al合金作为粘结合金,采用功率超声辅助的热浸镀法进行泡沫铝板的冶金连接,采用光学显微镜(OM)和扫描电镜(SEM)观察接头组织及界面结构,采用X射线能谱仪(EDS)测定界面处元素分布,对样品进行拉伸实验和摆锤冲击实验,并与无功率超声辅助样品和胶接样品比较。功率超声辅助冶金接头密实连续,Zn、Al元素相互扩散,在界面处连续分布;无功率超声辅助接头中存在大量气孔等缺陷。功率超声辅助冶金接头的拉伸性能和冲击性能均优于无功率超声辅助接头和胶接接头。在功率超声辅助下进行连接时,其空化作用和声流能较彻底地破除泡沫铝基体表面的氧化膜,同时能够促进组织均匀化、去气除杂,有利于形成良好的冶金结合和致密的冶金接头。
[Abstract]:Using Zn-10Al alloy as bonding alloy, the metallurgical bonding of aluminum foam plate was carried out by means of power ultrasonic assisted hot-dip plating. The microstructure and interface structure of the joint were observed by optical microscope and scanning electron microscope (SEM). The element distribution at the interface was measured by X-ray energy spectrometer (EDS). The tensile test and the pendulum impact test were carried out on the samples, and the results were compared with those of the non-power ultrasonic assisted samples and the bonded samples. There are many defects in the power ultrasonic assisted metallurgical joints, such as dense and continuous diffusion of ZnPn-Al elements at the interface, and a large number of holes in the non-power ultrasonic assisted joints. The tensile and impact properties of power ultrasonic assisted metallurgical joints are better than those of non-power ultrasonic-assisted joints and adhesive joints. The cavitation and acoustic flow can completely break the oxide film on the surface of aluminum foam substrate, promote the homogenization of the structure and remove the air and impurity, when the connection is assisted by the power ultrasonic. It is propitious to form good metallurgical bonding and compact metallurgical joint.
【作者单位】：同济大学材料科学与工程学院;上海市金属功能材料开发应用重点实验室;
【分类号】：TG457.14

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