Rolf Pfeiffer wrote:

Russel,

.25 mm is ok.
How costly is it to add .25 mm Fe to the side housings? Would it
stick?
Perhaps the Fe can then be chromed, hardened or nitrated?
Or perhaps the Fe is a tool steel to begin with?
However, hardening it may not work with Al attached to it.
I trust that attaching chrome directly will not stick sufficiently and
patches may come loose.

Are there any possibilities for side housings? and even the Trochoide?
at
TI.

Regards
Rolf Pfeiffer

Paul Lamar replied:

He is talking about an integrated circuit chip that is .25 mm square.
Not .25 mm thick. It is only molecules thick.

That's correct, Paul.  I'm actually talking about the bond pads on the
IC where the gold (Au) wires bond. The interstitial eutectic bonds are
actually a few hundred molecules thick, with various alloys created
through their depth.  If you're interested, here's some public info I
googled (URL may wrap):
http://www.williams-adv.com/tools/technical-papers.php?action=view&artic
leid=73

Suspect one of the things going on here is the stiffness or hardness
of the substrate has a lot to do with apex seal chatter.

Not only that, but I suspect that the substrate hardness plays a role in
how well the coating adheres.  And maybe even the difference between the
substrate hardness and the coating pliability plays a role in how well
it adheres (think about adding plasticizers to paint which is applied to
non-metal car parts).

I'm certain that Mazda has invested a small fortune in research on this
subject.

Russell Kent

Hell a huge fortune. That is why I have to laugh every time somebody
tells me they are going to make rotaries with coated aluminum
wear surfaces. History littered with failures along those lines.
The irony is the patents have expired years ago.
Just copy Mazda *(&^$#&())_ sakes!!!!!!!!!!!!!!!!

Paul Lamar ...No rotor no motor.

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