【摘要】 以Cu和SnZn合金的金属间化合物界面结晶为对象,研究均恒强磁场对界面化合物界面行为的影响,并通过扫描电镜、X射线衍射及电子探针分析磁场对界面金属间化合物组织、相结构及成分的影响规律。结果表明:与无磁场下的界面金属间化合物相比,0.1T磁感应强度降低了化合物层的生长,继续增加磁感应强度使得化合物层的生长加快。磁场改变了化合物层的晶体取向,但是对化合物的成分没有明显影响。这是因为磁场下热电磁对流和洛伦兹力对Cu溶解及液固界面前沿Cu溶质有富集的作用。更多还原

【Abstract】 Crystallization of intermetallic compound layer between Cu and SnZn alloy under uniform magnetic field was studied. The effect of magnetic field density on the growth behavior of the intermetallic layer such as microstructure, crystal orientation and composition was analyzed by scanning electron microscopy, X-ray diffraction and electron-probe microanalysis, respectively. Compared with the intermetallic layer without magnetic field, 0.1 T of magnetic flux density decreases the layer thickness. However, further increasing magnetic flux density promotes the layer growth. Application of magnetic field also changes the crystal orientation of intermetallic layer, but has no obvious influence on the layer composition. This phenomenon can be attributed to the role of thermo-electromagnetic convection and Lorentz force on the Cu dissolution as well as the accumulation of Cu solute at the interface front.更多还原