Single-crystal Indian or Australian muscovite book mica.
Available in crystal-clear flawless sheets and plates from
10 microns to more than 1 centimetre thickness,
more than 1 decimetre diagonal length.
the Young's mudulus need to be more than 20 GPa,
I need to make a small thin plate(3mm deep, 20mm diameter) with some
small holes through the plate using the material. and later I will
apply some presure(20 MPa) on the plate. so I am afraid some materials
are too brittle...
Mica isn't brittle at all. A strip 100 micron thick (normal to the
crystal plates) x 1 mm x 100 mm would be easy to tie into a knot.
I could probably tie several knots in that, without breaking it.
You can drill it, along the axis normal to the plates.
20 MPa is no problem, applied evenly. Is that 20 MPa
applied as a liquid or gas? What is its composition?
If it penetrates the mica between the plates, and then
the pressure is suddenly released, and the pressure medium
underwent a liquid-gas transition, the mica could puff up.
That's like vermiculite -- which is mica infiltrated with water,
then puffed by rapid heating.
Mucovite is without question the right mica.
I don't know anything about the McMaster material
or your application, so I can't say whether that material
would work. You'll have to read their specifications.
Note that mica sold for electrical insulating purposes
is often consolidated from smaller pieces
This sort of mica is not transparent. For transparency,
you must use single-crystal book mica.
How about some clear casting polyester with glass fiber reinforcement, or
basic clear epoxy with good wetting agent and glassfiber.
Deaerate the wet laminate in vacuum, and press between releasing agent
treated and polished glass plates in vacuum bag. Needs some practice, but
I once made pretty good ones with this technique for control window
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