Hi ycwbycwb
Thanks for the links, I particularly found the
High Velocity Wire and Rod Combustion Spraying an interesting link (my link is to the English version rather than German
)
Hi Intel55
Thinking back I do seem to remember getting unexpected high hardness for Hastelloy C on a few HVOF sprayed samples (~500 HV). Though I think hardness evaluation at the time was purely curiosity and not a requirement for a anti-corrosion coating. So I think the hardness will be very dependent on the process and parameters. The coatings will probably be very much harder than the wrought or cast Hastelloy C anyway.