I am currently working on an engineering project with a friend. Without giving too much away, I have two parallel strips of Zirconium-Copper alloy sandwiched between an upper and lower piece of smooth PTFE. Between those two strips of metal runs a channel, and I wish to run liquid nitrogen (or another cryogenic coolant) in there.
My question is will a pressure seal alone (light pressure being applied from top and bottom uniformly) be enough to keep the liquid nitrogen in the channel? Will PTFE seal when pressed against itself, or when pressed against a metal?
To be clear, this is oil-free PTFE without any filler.
Some data on the materials:
An image of the setup. PTFE is in white, copper in orange... This is just a crude representation.