I finally finished the experiment of the surface tension, so tired! Next, we must study the cause of the result and how to reduce the surface tension of the two interfaces of the solid solution.
Looking at the papers of the brothers, finding the phenomenon of "edge ridges" when solidification, I feel that there is a problem with him. I want a good way to repeat a group of experiments on the experimental station and explore.
Ultrasonic problems are more complicated, and many experiments are not good, I have to come slowly. It is estimated that everything is clear, I can graduate! ! ! !
