Recently, we are trying to aluminize a high Cr superalloy at 1000C.
Because of the high Cr(15%) content and activity inside the superalloy, the Cr formed a Cr-rich layer beneath the coating, like a barrier suppressing the Nickel from diffusion outside, and seem to stop the aluminum from diffusing inside as well.
It is probably due to the low activity of Ni and Al in a Cr-rich Ni-Al-Cr system. Does anybody have any papers or an activity diagram that can solve my problem?
Any ideas are welcome.
Ranganathan Srinivasan
Assessed thermodynamic properties of the ternary system Al-Ni-Cr are available in literature. These data can help you. You can look for papers in Calphad. You will also need information on the kinetics of diffusion to analyse your problem.
0 votes
0 thanks
- Badges
- Science topic
More Yu Haojun's questions See All
Similar questions and discussions