Ceramics for engine exhaust
Ceramics for engine exhaust
(OP)
A need in my particular field of interest exists for a tuned pipe/muffler (for IC engines) that has very low thermal conductivity, mild to moderate strength, good thermal tolerance (1600deg.F) and be relativly easy to manufacture. Typically aluminum, steels or carbon fiber w/ a BMI matrix are used. I was thinking a Ceramic material (pourable, injectable?), reinforced or not might be worth exploring but soon realized the technology is complex (for me). so my question is am I barking up the right tree here. are there castable ceramics availabe that may work in this application and are available to the average person. thanks





RE: Ceramics for engine exhaust
RE: Ceramics for engine exhaust
RE: Ceramics for engine exhaust
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Plymouth Tube
RE: Ceramics for engine exhaust
If I understood your last post correctly, you are likely referring to a housing that has been made using injection molding technology, similar to metal injection molding. While this may be suitable for some types of parts, I would not imagine a relatively "fluffy" part like an exhaust manifold would be suitable. Smaller, more discrete parts with good load paths, no deflection, etc.
RE: Ceramics for engine exhaust
TVP, to offer a better understanding an example would be what resembles a baseball bat.Hollow,30" long, 2.5-3" diameter w/ taper on one or both ends. A steel pipe about 12" long is between this an engine. Application is weight sensitive (less than one pound req) but equally important would be the ability to retain heat (not radiate). the existing carbon/BMI designs weight 6-7oz and do a very good job of not radiating heat (dumping gases through outlet at rear)but are right on the max service temp threshold. The market is relatively small so manufacturing cost have to be low (what's new). I have the ability to produce tooling inhouse if I can find a suitable material. I appreciate you folks taking your time to think about this
RE: Ceramics for engine exhaust
FyreRoc is a matrix of polyacrylonitrile carbon fiber and glass/ceramic epoxy resin which can be used up to 630 degrees C.
RE: Ceramics for engine exhaust
We'll see what they have to say about it. Probabley not ideally suited but then again.....
RE: Ceramics for engine exhaust
Mike Halloran
Pembroke Pines, FL, USA
RE: Ceramics for engine exhaust
RE: Ceramics for engine exhaust
It was not remarkably lighter or heavier than briar. It didn't conduct much heat.
It lasted 30 years before yet another collision with a floor revealed that it was actually double walled and hollow.
I have no idea how it was made.
I haven't seen one in years. I guess its lifecycle was sort of like that of jetways; the initial production run completely saturated the market, and the product was durable enough that replacements couldn't keep the company alive.
I have the impression that the material was also used to make rocket nozzles. Maybe you can find someone who can make expansion chambers from it.
Mike Halloran
Pembroke Pines, FL, USA
RE: Ceramics for engine exhaust