Gordon England Surface Engineering Forum



Re: ceramic coating

Posted by Juergen (217.6.15.137) on 16:18:05 20/07/05

In Reply to: ceramic coating posted by morteza

: dear
: i need some information about coating the st52 steel with ceramic oxide as a thermal barrier
: and i need the easiest way to coating
:
: thanks alot

------------------

Hi,

I suggest to spray first a metallical bond coating on the steel substrate: Thickness 100 - 300 microns (Material e.g. NiAl 95-5 or NiCrAlY)
and for top coating ZrO2-93-Y2O3-7. For both powders use APS (atmospherical plasma spraying).

The thickness of the TBC ZrO2-93-Y2O3-7 mainly depends on the temperature drop you need. But don´t forget the cooling of the coated base material. In this manner turbine airfoils will be coated.

Regards,

Juergen


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