The microtopography of the surface wore by the three kinds of the erosion have been observed using the scan electron microscope (SEM).

• 借助扫描电子显微镜（SEM）对翼型表面受空蚀、泥沙磨损以及联合作用破坏后的微观形貌进行观察，分析材料破坏的机制和过程；