Flexible Ceramic
Flexible Ceramic
(OP)
I am in desperate need of a ceramic to use in a head gasket setting.
I have used Macor with the thousand little pieces after it was run for 20 minutes. I think it actually broke up when we un-torqued the head. (no carbon in the cracks)
we tried aluminum oxide and it broke radially with no particular pattern.
Next we were looking into silicon nitride but it is costly and difficult to find a grinder to put in some 1mm holes that we need.
Thanks in advance for your help
ref:US patent 7299785
I have used Macor with the thousand little pieces after it was run for 20 minutes. I think it actually broke up when we un-torqued the head. (no carbon in the cracks)
we tried aluminum oxide and it broke radially with no particular pattern.
Next we were looking into silicon nitride but it is costly and difficult to find a grinder to put in some 1mm holes that we need.
Thanks in advance for your help
ref:US patent 7299785
I don't know anything but the people that do.





RE: Flexible Ceramic
There are many forms and producers of both materials.
http://www.dimpypower.com/micanite.htm
http://www.icrmica.com/icrmica_micanite.html
http://w
RE: Flexible Ceramic
We have used them successfully in downhole applications.
There have been huge advances in the last few years.
Tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: Flexible Ceramic
RE: Flexible Ceramic
Bruce
www.accuratus.com
RE: Flexible Ceramic
Slawomir
www.pkerengineering.com
RE: Flexible Ceramic
Check out Flexitallics sheet thermiculite products, for your application TH866 might be a good bet or TH896 if you need more strength.
http://www.flexitallic.eu/thermiculite%C2%AE
RE: Flexible Ceramic
The minimum material requirements are dielectric to accommodate 20kv
and working temperature of 500f. The compressive strength eludes me as the numbers worked out for alumina oxide with 6 head bolts distributing across and area about 5" x 5"
I don't know anything but the people that do.
RE: Flexible Ceramic
Have you considered boron nitride? It's machinable and low expansion which will reduce the risk of thermal stress failure. Furthermore, it has a low friction coefficient against most materials allowing some slip with thermal expansion mismatch. It also has a relatively low young's modulus to help accommodate small distortions. It should easily meet your dielectric requirements. There are many composites available offering slightly different enhancements to the material properties.
Bruce
www.accuratus.com
RE: Flexible Ceramic
One thing to add is the combustion seal is taken care of with .010 soft cooper gasket top and bottom and that works well.
I looked into the boron and silicon nitride both are expensive
I got a quote of 2600.00 for a 92mm ID 98mm OD 3mm thick with 4 1mm horizontal radial holes
I am going to look into the high temperature polymers as they could be the answer now and in production, where as the ceramic are definitely out of the running for production units.
I don't know anything but the people that do.