How big are the cuts you plan to make? Fastening your material to the bottom of an aluminum tank that can be bolted down to your mill bed would be a feasible strategy if the parts were fairly small. But if you're cutting corundum windows for a space shuttle or something, constructing a machine that's hardened against abrasive slurry might be your best bet. You can get diamond tooling that's designed to dispense coolant through the tool and into the cut, but it takes a special spindle to run it.