Vacuum cementing

Vacuum cementing

Vacuum cementing or vacuum welding is the natural process of solidifying small objects in a hard vacuum. The most notable example is dust on the surface of the moon.

This effect was reported to be a problem with the first American and Soviet satellites, as small moving parts would seize together.

References

* [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19650019853_1965019853.pdf The Implications of the Ranger Moon Pictures] (Page 4 references lunar dust vacuum welding)
* [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19900014421_1990014421.pdf Lunar Rated Fasteners] (Page 3 specifies how to build components resistant to vacuum welding)

ee also

* cold welding


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