Metallography for Metco 106F
09-14-2018, 03:03 PM, (This post was last modified: 09-14-2018, 03:19 PM by T.Ann.)
#1
Metallography for Metco 106F
We are attempting to spray Metco 106F which is new for our company. The powder is a 96% Cr2O3 powder with 3% TiO2. The metallography is showing a globular dark phase which resembles oxide? I cannot find any micrographs of what the metallography should look like and this darker phase comprises about 1% of the area. I'm trying to figure out if this is intrinsic to the coating or if it is some type of contaminant. I tried to insert my photomicrograph but cannot attach. Could someone please reply with a photo of a typical microstructure. Thank you!

[Image: tann1-tn.jpg]

Finally got an image link.
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09-14-2018, 04:37 PM,
#2
RE: Metallography for Metco 106F
The dark areas are no different than water or alcohol, that remained on the cross-cut surface. These areas are transparent, you can see normal coating structure underneath.
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09-14-2018, 05:21 PM,
#3
RE: Metallography for Metco 106F
Hi T.Ann

Sign0016 to the Surface Engineering forum.

I think these odd inclusions are fairly typical for Metco 106F coatings and are just other oxide phases.

Cheers

Gordon
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09-19-2018, 04:01 PM, (This post was last modified: 09-19-2018, 04:02 PM by T.Ann.)
#4
RE: Metallography for Metco 106F
No, they are not water or alcohol. They are melted and part of the coating structure.
(09-14-2018, 04:37 PM)Vadim Verlotski Wrote: The dark areas are no different than water or alcohol, that remained on the cross-cut surface. These areas are transparent, you can see normal coating structure underneath.


Thank you!
(09-14-2018, 05:21 PM)Gordon Wrote: Hi T.Ann

Sign0016 to the Surface Engineering forum.

I think these odd inclusions are fairly typical for Metco 106F coatings and are just other oxide phases.

Cheers

Gordon

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