据“Metallography“1987,№2报道:用扫描电镜对Al—Si合金进行金相检验时,使用腐蚀剂的目的是为了腐蚀a(Al)固溶体或合金中的硅相,以便观察未腐蚀相的结晶形貌和分布状态。由于这种合金的机械性能是由α相基体中Si相的尺寸、形状和分布状态决定的。所以,一些学者研究出了几种腐蚀剂,用来显示Si相的形貌和分布状态。 According to ”Metallography" 1987, No. 2, reported: Metallographic examination of a Al-Si alloy by a scanning electron microscope was performed using an etchant intended to etch the silicon phase in the a (Al) solid solution or alloy for the purpose of visualizing the uncorroded phase Crystal morphology and distribution. Because of the mechanical properties of this alloy is determined by the size, shape and distribution of the Si phase in the alpha phase matrix. Therefore, some scholars have developed several etchants, used to display the morphology and distribution of Si phase.