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TEM image analysis
Both the metallographic microscope and the scanning electron microscope can only observe the microscopic morphology of the surface of the substance, and it cannot obtain information inside the substance. The transmission electron microscope will interact with atoms in the sample after incident electrons pass through the sample, thereby changing its energy and direction of movement. Obviously, different structures have different interactions. In this way, the internal structure of the sample can be understood based on the information obtained from the transmission electron image. Due to the complexity of the sample structure and interaction, the images obtained are also very complex. It is not as intuitive and easy to understand as the surface appearance.