Rotary Car Performance General Rotary Car and Engine modification discussions.

ceramic for 2nd gen.

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Old 11-07-06, 10:14 PM
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ceramic for 2nd gen.

What type of ceramic are they made of? There is lots of different type of ceramics.

ever heard of silicone nitride?
Old 11-07-06, 10:25 PM
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What are you talking about? Ceramic brake pads? You need to specify.
Old 11-07-06, 10:38 PM
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oh, apex seals
Old 11-08-06, 04:46 AM
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$1,000+ for a set of six for one engine, last time I checked...
KA-CHING!


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Old 11-08-06, 04:49 AM
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In relation to the iron/aluminum/w/e material the stock apex seals are made from, any ceramic will be much, much stronger than them.

GG chatter marks?
Old 11-08-06, 07:08 AM
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^ zomg ima go bake my own out of porcelain then brb!!
Old 11-08-06, 09:10 AM
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no1 gave me an answer
Old 11-08-06, 09:16 AM
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Ever heard of "proprietary"?


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Old 11-08-06, 09:18 AM
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You think people would give away thier compositions for thier apex seals?

Why not call up Atkins and ask them for thier recipe
Old 11-08-06, 09:43 AM
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Originally Posted by rx7vadim
What type of ceramic are they made of? There is lots of different type of ceramics.
Various seals have been tried, among them, those made of Si3N4 (silicon nitride), SiC (silicon carbide), alumina (Al2O3), zirconia (ZrO2), TiC (titanium carbide), and TiC-graphite composition (titanium carbide graphite composition).

Of those, TiC 15wt% graphite composition has the lowest wear rate. The TiC-graphite compositions overall have self-lubricating characteristics and exhibit superior sliding characteristics.

Originally Posted by rx7vadim
ever heard of silicone nitride?
Yes. The R26B used Si3N4.
Old 11-08-06, 10:35 AM
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ceramics are anti frictional, they are no stronger than the base they are made out of, they will last a fair bit longer but they will break just like any seal will if you detonate hard enough.
Old 11-08-06, 11:48 AM
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Originally Posted by My5ABaby
Various seals have been tried, among them, those made of Si3N4 (silicon nitride), SiC (silicon carbide), alumina (Al2O3), zirconia (ZrO2), TiC (titanium carbide), and TiC-graphite composition (titanium carbide graphite composition).

Of those, TiC 15wt% graphite composition has the lowest wear rate. The TiC-graphite compositions overall have self-lubricating characteristics and exhibit superior sliding characteristics.


Yes. The R26B used Si3N4.
I think nrs seals are silicone carbite and silicone nitride.. So is that the reciept? silicone nitride?
Old 11-08-06, 11:49 AM
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r26b used si3n4 %100 pure? hot pressed?
Old 11-08-06, 11:49 AM
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who knows and who cares.
Old 11-08-06, 11:59 AM
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because they r not worth $1000-$2000, i need to find out the properties so that i could make some for all rx7 owners in the world
Old 11-08-06, 12:04 PM
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Originally Posted by rx7vadim
because they r not worth $1000-$2000, i need to find out the properties so that i could make some for all rx7 owners in the world
please don't
Old 11-08-06, 12:06 PM
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well then you need to do some homework, people don't do research and development for other people to steal their ideas and make a buck off it themselves at their own loss.

this thread has little to do with the second gen RX7, it should have been opened in the general section.
Old 11-08-06, 01:39 PM
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No offense, but if you plan on making seals, you shouldn't have to ask these questions.

I got my info from

R & D on Functional Structural Ceramics (Application to Sliding Parts)
Nippon Steel Technical Report No. 59 October 1993; pages 37-43
Masanori Ueki
Old 11-08-06, 08:49 PM
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This was as almost entertaining as Rotary Noob's thread on fabricating FRP parts...


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Old 11-08-06, 09:30 PM
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Originally Posted by RETed
This was as almost entertaining as Rotary Noob's thread on fabricating FRP parts...


-Ted
im feeling left out, i want to start a "how to make a full titanium body" thread
Old 11-09-06, 08:35 AM
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that was a retarded comment
Old 11-09-06, 08:36 AM
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u need to make a titanium brain
Old 11-09-06, 10:56 AM
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You obviously have no idea how much R&D goes into designing a seal. Its more than just copying the shape.
Old 11-09-06, 11:56 AM
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I hope everyone is taking notes on exactly how to NOT develop a product. I mean I spent 4 years doing R&D, prototype development and extensive testing when all I had to do is come on here and ask you guy's how it's done! If the guy can't even afford a set of ceramic seals, we should trust him to make them for us?

Maybe you should get into Police work. You can run down the street, point at a house and say the bad guy's are in there.

Hey Betty Crocker, go back to school, get your GED, pick up an easy bake oven and start pumping out the ceramic seals. I'm sure the masses will be lining up to buy them from you.

If you guy's want a serious quality product designed and developed with the best materials and processing you know where to find me.
Old 11-09-06, 04:58 PM
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oh please, u worried that no1 will buy seals from you anymore.



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