利用原子力显微镜观察了挤压态Al18B4O33 w/pure Al复合材料早期腐蚀过程中表面形貌的变化特征.研究了沿与挤压方向成不同角度截 取的Al18B4O33 w/pure Al复合材料在35%NaCl溶液中的腐蚀规律.结果表 明：晶须与基体的界面是腐蚀易于发生的地方，点蚀首先在晶须的端部产生，随后沿着晶须 与基体的界面扩展.挤压后沿与挤压方向成不同角度截取的Al18B4O33 w/pur e Al复合材料表面腐蚀坑的深度存在差别.
The changes of the surface morphology of an extrude d composite of Al18B4O33 w/pure Al during the early stages of corr osion by 3.5%NaCl solution were observed by atomic force microscopy.The features of corrosion of the composite samples with different normal angles to the extru sion orientation in 3.5%NaCl solution were studied.The results indicated that co rrosion occurred preferentially at the interface between whisker and matrix.Pitt ing occurred frequently at the end of whisker firstly and propagated along the i nterface between whisker and matrix.The number and size of pits on the surfaces of the extruded Al18B4O33 w/pure Al composite samples are differen t due to the sample surfaces with various angles to the extrusion orientation of the bulk composite.
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