Drilling screw holes into niobium material (M1, M2)

Niobium becomes a superconductor at the highest critical temperature (9.2K), and its properties are being utilized for industrial purposes.
It is anticipated that it will be used in a wide range of applications, including MRI and NMR devices, solenoid coils used in nuclear fusion reactors, and superconducting accelerators that are expected to shed light on the Big Bang.

This time, we attempted to process screw holes, which are essential for mounting to such devices.
However, we did not understand its processing characteristics, and initially we had difficulty with issues such as protrusions on the back surface.

By reconsidering the processing method and changing the processing conditions, we were able to successfully process to a depth of 2 mm with M1 and M2!

Material: Niobium
Machining shape: Screw hole (M1, M2)
Depth: 2mm
Using Machine: Machining Center

We are also challenging with machining Nb.
Especially, machining Nb screws.

WEB page of <Electric wire cut to Nb (Niobium)> is below:
https://en.nc-net.com/company/46129/product/detail/78015/