Please remember that ceramics, like concrete, hardly have any strenght in the field of pull/stretch. That's exactly the kind of force (centrifugal) that is induced in a high rpm spinning turbine wheel. Fibers might not help you there, the centrifugal forces might just rip off the concrete of the fibers.
Perhaps I'm a bit to negative about it, but consider what I say.
Your scepticism is fuel for my brain.