Posted by Leon (65.223.237.181) on 17:58:22 26/05/06
In Reply to: Re: contamination in TBC bond coat posted by Hong
Hong,
The color of TBC turns out to be very tricky and it depends on
powder chemistry, i.e. impurity oxides content, and processing
condition. For coatings heat treated at temperatures higher than
800 degree C, yellow coating means low purity and white coating
indicates high purity.
I did some work on the color of TBCs and have a paper in ITSC06
proceedings on this. If you send me an email, I can send you the
paper.
Leon
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