Material Selection for Cooling Plate
Material Selection for Cooling Plate
(OP)
We are looking to use a material in a special cooling plate for a vacuum application. It must have the following characteristics:
1) Non-magnetic [key criteria].
2) Really low electrical conductivity.
3) Really high thermal conductivity.
4) Really high tensile strength.
5) Non-outgassing.
6) Weldable.
7) Machinable.
Current material is 316 SS - can anyone come up with a better suggestion?
Thanks!
1) Non-magnetic [key criteria].
2) Really low electrical conductivity.
3) Really high thermal conductivity.
4) Really high tensile strength.
5) Non-outgassing.
6) Weldable.
7) Machinable.
Current material is 316 SS - can anyone come up with a better suggestion?
Thanks!
Gareth P. Hatch, Ph.D.
Director of Technology
Dexter Magnetic Technologies
http://www.dextermag.com





RE: Material Selection for Cooling Plate
how are you dealing with 316 propensity to develop ferromagnetic properties over time?
RE: Material Selection for Cooling Plate
We are using this plate near a magnetic assembly, hence we don't want it to be magnetic. We want the material to have good thermal conductivity, so the plate can do it s job [cooling] - but low electrical conductivity to reduce the creation of eddy currents [the magnet assembly moves].
Thanks!
Gareth P. Hatch, Ph.D.
Director of Technology
Dexter Magnetic Technologies
http://www.dextermag.com
RE: Material Selection for Cooling Plate
eddy currents are a function of your metal thickness, the structure of your platen, and the speed of your magnet.
how are you cooling the plate? what do you mean by low outgassing: it means one thing in an annealing furnace another in uhv.
RE: Material Selection for Cooling Plate
We tried this with aluminum, exact same dimensions of the plate, and the eddy currents killed us. The plate is being cooled underneath by flowing water at 20 PSI pressure. The plate is actually more of an enclosed pocket.
Low outgassing refers to the fact that this will be used in a vacuum system.
Gareth P. Hatch, Ph.D.
Director of Technology
Dexter Magnetic Technologies
http://www.dextermag.com
RE: Material Selection for Cooling Plate
Check titanium alloys
RE: Material Selection for Cooling Plate
aluminum is not considered low outgassing in some vacuum app's because of its vapor pressure at temperature and its tendency for thick oxide layers (depending on surface treatment and alloy grade), and its ability to pick up abient gases. it is fine in most industrial vacuum environments.