Duplex Ceramic Coating
03-30-2010, 07:36 AM,
#1
Question  Duplex Ceramic Coating
Hello every1,

Very recently I got a component to be Plasma-sprayed where the client specs demanded Chromium Oxide coating on Alumina coating.

I have never sprayed two ceramic coatings on top of each other and I am very skeptical if this would provide any advantage!?

- I wanted to know if such coatings would actually give advantage over only chrome oxide coatings?

- If the client insists on such duplex ceramic coating, would there be any be a problem and what special care would I need to take while spraying Chrome Oxide on Alumina?

I appreciate your inputs.

Regards

k09
Reply
03-30-2010, 08:08 AM,
#2
RE: Duplex Ceramic Coating
(03-30-2010, 07:36 AM)k09 Wrote: Hello every1,

Very recently I got a component to be Plasma-sprayed where the client specs demanded Chromium Oxide coating on Alumina coating.

I have never sprayed two ceramic coatings on top of each other and I am very skeptical if this would provide any advantage!?

- I wanted to know if such coatings would actually give advantage over only chrome oxide coatings?

- If the client insists on such duplex ceramic coating, would there be any be a problem and what special care would I need to take while spraying Chrome Oxide on Alumina?

I appreciate your inputs.

Regards

k09

Hi,

Look here:

(links dead)

This is powder Cr2O3-Al2O3

Ion
Reply
03-31-2010, 05:15 AM,
#3
RE: Duplex Ceramic Coating
Hi Ion,

thank you for the link. They have now specified the composition anywhere? But i can start my search from here.

As per specs, this coating is to be sprayed by Detonation Spray Process. I would need to sit down and conduct trials to get the parameters right!

Thanks & Regards

k09
Reply




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