Detecting delamination 3

[limct]

Hi,
I'm looking for ways on how to detect delamination effect of a clear silicone rubber layer adhered to a white color surface. Can anyone shed some light here? Thanks!

Best regards,
ct

 

[cloa]

What is the white color surface?

 

[limct]

Cloa: It's a type of ceramic.

Best regards,
ct

 

[Ron]

If you can test from the ceramic side, you can use ultrasonic testing. The silicone rubber will act like a couplant and show a longer wave length of the ultrasonic wave. If you hit a delaminated spot, it will shorten the wave length.

No standards for this...you'll just have to try it and "calibrate" to actual observations.

 

[limct]

Thank you very much Ron. Happy new year!

Best regards,
ct

 

[Ron]

limct...thanks, Happy New Year.

Also, if the piece is large enough, you could use a small vacuum box or tube and apply a vacuum to the silicone rubber. Delaminated areas will lift up slightly.

 

[unclesyd]

The first two ref. are for Thermography and one instrument that I know is used for detecting lamination's in several materials.
The third ref. is an adder to the post by Ron

http://www.infraredtraining.com/ir_primer.asp

http://www.qi2.com/engineer/id173.html

http://www.sonatest.com/products/multi/rapidscan/Overview.html

 

[limct]

Thanks Unclesyd.

Best regards,
ct