Coatings for Polymer Matrix Composites
03-27-2014, 11:09 AM,
#1
Coatings for Polymer Matrix Composites
Dear All,

What would be the most suitable process to deposit ceramics onto a CFRP? I'd thought of APS but I would like to have your opinions.
Secondly, how to prevent the substrate to be damaged from the high temperature environment?

Any suggestions would be greatly appreciated.

Thank you.

Regards,

Nadiir
Reply
03-27-2014, 01:26 PM,
#2
RE: Coatings for Polymer Matrix Composites
Not really familiar with the substrate exactly, but suppose similar to fibre glass in the application.

I think would try the ceramic directly, no bond coat.

If that did not work, would try an arc spray coating of a low temperature material like Zn or Al, and then ceramic on top

if that is allowed


(03-27-2014, 11:09 AM)Nadiir Wrote: Dear All,

What would be the most suitable process to deposit ceramics onto a CFRP? I'd thought of APS but I would like to have your opinions.
Secondly, how to prevent the substrate to be damaged from the high temperature environment?

Any suggestions would be greatly appreciated.

Thank you.

Regards,

Nadiir

Reply
03-28-2014, 01:45 AM,
#3
RE: Coatings for Polymer Matrix Composites
Actually, that's the issue - I'm not permitted to attach any bondcoat that would induce the thermal conductivity of the coated substrate.

I need to keep the heat transfer as low as possible when the coated substrate is exposed to a heat source.

I guess I'll need to abide to your first option.

Thanks!
Reply
03-28-2014, 05:42 AM,
#4
RE: Coatings for Polymer Matrix Composites
Hi

Twin wire arc process can not do ceramics. The best option is powder flame spray gun (.i.e 5P & 6P Guns) will work very well for ceramics and heat input also low comparatively Plasma Gun.


Regards,

SREENIVAS
Reply
03-28-2014, 09:49 AM,
#5
RE: Coatings for Polymer Matrix Composites
Hi,

So, as per your suggestion, powder flame spray would be more suitable to coat a PMC with ceramics.

I'll give it a try.

Thanks.

Regards,

Nadiir
Reply
03-30-2014, 06:01 AM,
#6
RE: Coatings for Polymer Matrix Composites
Hi Nadiir,

You must use cooling system and if possible sulzer metco gun which will give very good ceramic coatings which can be comparable with plasma up to certain extend.


Regards,

SREENIVAS
Reply
03-30-2014, 08:38 AM,
#7
RE: Coatings for Polymer Matrix Composites
Hi Sreenvinas,

Thanks for the additional tip. I've taken note of it. Hopefully, I can keep you posted about the experiment once started. I've decided to do both flame spray and plasma spray. I believe that could support my justifications.

For the time being, I'm figuring out what could be modeled (using CFD) prior to my experiment, that would help me to optimize the spray process.

Any suggestions?

Thanks!

Regards,

Nadiir
Reply




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