Quickly cuts specimens from hard, brittle materials
The Model 170 Ultrasonic Disk Cutter rapidly cuts transmission
electron microscopy (TEM) specimens from hard, brittle materials
without mechanical or thermal damage. It directly produces
disk specimens from materials as thin as 10 microns, cylindrical
rods up to 10mm long from bulk samples, or rectangular wafers
that are subsequently used in the preparation of cross-section
TEM (XTEM) specimens.
Its unique design means that the sample is always presented
parallel to the cutting axis. An optional microscope facilitates
site-specific cutting by helping to locate an area of interest
in the bulk material. A dial indicator accurately displays
the depth of the cutting tool. The process is automatically
terminated once the specimen has been cut.
The Model 170 Ultrasonic Disk Cutter uses the excitation of
lead zirconate titanate (PZT) crystals oscillating at a frequency
of 26kHz to effect cutting tool movement. The cutting medium
is an abrasive slurry of either boron nitride or silicon carbide.
Tool motion is optimized to cut at the maximum rate while
minimizing mechanical and thermal specimen damage.