How can electron-beam machining shape materials that are too hard for conventional cutting tools?

Electron-beam machining (EBM) is a nonconventional process capable of shaping materials that are too hard for conventional cutting tools because it relies on thermal vaporization rather than mechanical force.1

In this process, a beam of high-velocity electrons is focused onto a workpiece within a vacuum chamber. The vacuum is essential to prevent the electrons from scattering due to collisions with gas molecules. Upon striking the surface, the kinetic energy of the electrons is converted into intense heat, which vaporizes minute amounts of the material.1

Because this method does not involve physical contact or mechanical cutting edges, it can effectively cut fine holes and slots—as small as 0.001 inch—in virtually any material. This precision makes it particularly useful for high-resolution applications, such as the manufacture of complex integrated circuits and specialized aircraft engine components.1