Esteemed Colleagues,
Does anyone have suggestions about couplants for ultrasonic transduers at high PT? Apart from using Au or Pt foil, are there any polymers (?) or other high viscosity materials that will not breakdown at high temperatures? Most of the products I have come across breakdown above 200 degC.
Also, and this is for the vintage generation like me: what was the chemical formula for the couplant V9 made by Dow Corning? It gave beautiful shear signals!
Mahalo,
Manika
Long-time back, I have used an high-temperature grease supplied by an UT equipment maufacturer from UK, or Germany(?).I found it to be stable for a few hundred hours at 2000 C.Now, I don't remember the name of the company which supplied it and it may be non-organic and chlorine-free etc for NDT test purposes.They were recommending its use upto about 5000 C for short time.I will try to recollect and let you know.
With best wishes,
K.Swaminathan
Did you try pressure coupling?
see http://link.springer.com/article/10.1007/BF00733822
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