This category includes all aspects of Cryogenics: the production and study of extreme sub-zero temperatures. This includes the production, use, and storage of liquid gases (nitrogen, oxygen, helium), mechanical freezers for those temperatures, and the attempts to reach absolute zero. It also includes a recent use of cryogenic technology in which metals are dipped in liquid nitrogen to improve various qualities.
Please submit sites here which concern companies which offer the service of immersing metals and other materials in liquid nitrogen in order to increase their wear, or similar "dry" techniques which use liquid nitrogen temperatures without actual immersion. Also submit sites here for companies which manufacture such systems.
Cryogenic Processing of Materials is the technique of immersing materials in liquid nitrogen (at -196 degrees C or -320 degrees F) in order to strengthen them. The cold temperatures cause the molecules to shift into alignments that are less subject to wear. This works with metals, wood, and some plastics.
Some web sites simply call this "cryogenics," but that confuses it with the more common and proper definition of the term, which is "a branch of physics which deals with the production and effects of very low temperatures," typically -90 C and below.
Please submit sites here which concern companies which offer the service of immersing metals and other materials in liquid nitrogen in order to increase their wear, or similar "dry" techniques which use liquid nitrogen temperatures without actual immersion. Also submit sites here for companies which manufacture such systems.