Thermallt conducting compound
Thermallt conducting compound
(OP)
I am looking for a thermally conducting compound to function at 600-800 deg. C in air.
Linking stainless steel and cast iron .
Conductivity exceeding 16 W/mK ( 110 BTU-in/hr F sq.ft.) (27 BTU/ft.hr F),
Must remain solid up to 1000 deg C.
Gap to fill 3 mm
Many thanks
Linking stainless steel and cast iron .
Conductivity exceeding 16 W/mK ( 110 BTU-in/hr F sq.ft.) (27 BTU/ft.hr F),
Must remain solid up to 1000 deg C.
Gap to fill 3 mm
Many thanks





RE: Thermallt conducting compound
RE: Thermallt conducting compound
Try to go spelunking at www.matweb.com
RE: Thermallt conducting compound
does graphite come in a form that could fill a gap and bond to both surfaces and conduct effectively across gap?
RE: Thermallt conducting compound
TTFN

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RE: Thermallt conducting compound
RE: Thermallt conducting compound
Assuming you can solve the joint design problem and we focus strictly on potential solids meeting your thermal requirements, you might consider the following:
OFHC copper (possible interfacial corrosion products, very soft-a good thing)
graphite (you're at its upper use temperature in air, watch out for anisotropy especially in pyrolytic grades)
boron nitride(barely meets requirement,soft & machinable, at upper use temp., anisotropic, CTE mismatch)
aluminum nitride (hard-requires diamond tooling, low thermal expansion coefficient)
beryllium oxide (hard, TOXIC, low CTE)
The ceramics will be available for smaller area joints only. Minimizing the physical extent of the joint design will be desirable regardless of the material choice.
So, design your joint as small as possible, polish the faying surfaces, make sure all surfaces are flat, uniform clamping pressure, use as soft a material as possible, design for minimum warpage with temperature excursion and match thermal expansion coefficients as best you can.
Good luck,
Bruce
Bruce
http://accuratus.com