# What is the vapor pressure limit of liquid metals in space?

Would liquid metal be stable in space unlike most other liquids like water? Are there any metals that has a high vapor pressure limit?

Side question: Can liquid metal be given an electromagnetic field if electricity is passed through it?

Liquid shield for spacecraft?

https://astronomy.stackexchange.com/questions/30425/could-the-sun-have-liquid-iron-in-orbit

• It is not called the Armstrong limit it is called the vapor pressure
– Uwe
Mar 14 '19 at 22:58

The question has been evolving. I've addressed the original:

Are there any metals that has a high Armstrong limit?

I've never heard of a liquid metal that boils at 20° C or 37° C in a vacuum. Metallic hydrogen might be suggested but that's not a liquid at atmospheric pressure. So I think the answer is pretty much

## All of them!

Things like mercury or gallium (>30° C) would just sit there as liquids at 2 atmospheres, 1 atmosphere, or vacuum. They have low (but non-zero) vapor pressures but they wouldn't suddenly boil. Ditto for most eutectics as well.

• The Armstrong limit is not at 20 °C, it is at 37 °C.
– Uwe
Mar 14 '19 at 23:02