Thermal Insulation Materials

Hi,

I'm looking for some advice to help me specify a suitable thermal
insulation material for a test rig I'm building as part of my research
at Cardiff University.

I need to insulate the sides of a rotating disk, used in the test rig.
The disk is made from steel, and I need to apply an insulating ring to
both faces of the disk, in order to reduce heat losses in a controlled
manner.

The rings would be around 75mm outside diameter, 65mm inside diameter,
and at least 4mm thick (although this dimension is still to be
finalised. I would envisage atttaching the ring to the disk using some
form of high temperature adhesive, although a mechanical means of
attachment may be possible.

The disk reaches temperatures of up to 300 degrees C, and the ambient
temperature within the test chamber is around 80 to 100 degrees C. The
insulation material would be subjected to no mechanical loads, but
would be rotating with the disk at up to 12000 rpm. In addition, the
insulating material would be subjected to a combination of oil sprays
and oil mist, from the lubrication system. The oil is a synthetic
traction fluid.

I would also need to machine some shallow grooves into the material, to
accommodate various sensors which are attached to the disk.

Has anyone got any ideas?

Cheers

Alastair Clarke

.

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