The so-called perfect hollow metal ball mainly means that the shell is integrally formed, has no pores, uniform thickness, no impurities in the ball, and it does not matter whether it is vacuum or not. Can such a ball be made with current technology? How to make it?

I have two thoughts: First, can the self-growth of metals be realized at present? The second is the existing mold, like a chocolate ball, brush a layer of molten metal on it, and the mold will automatically break at a certain time. But how to ensure that the thickness of the shell is uniform and how to remove the mold impurities in the ball?

No best answer

1.First, a weightless environment and vacuum are needed to create a spherical mold with a sufficiently smooth inner surface, put the metal in, heat it in a vacuum state to vaporize the metal to generate metal vapor, and then remove the heat source, use some means to cool the mold quickly, in the case of weightlessness Next, let the metal gas condense and deposit on the mold, and finally remove the mold to obtain a hollow metal ball.
2.Coating liquid metal outside the mold under weightless environment
Then heat and vaporize the internal mold (ensure that the boiling point of the mold is much lower than the boiling point of the metal) Then, the liquid hollow metal ball can be obtained under the condition of maintaining high temperature.