Operation; Introduction; Application; Function - Struers Tenupol-3 Mode D'emploi

Tenupol-3
Instruction Manual

2. Operation

2.1. Introduction

Tenupol-3 comprises a base plate with a polishing cell, a built-in, infrared
detector system, a cooling coil and a pump system, all placed on top of a
PVC-reservoir for electrolyte. The electrical parts, pump etc. are connected
to a separate control and power supply unit through a single cable.

2.2. Application

Tenupol-3 is an automatic instrument for electrolytic thinning of specimens
for Transmission Electron Microscopy and other methods of examination
where the thickness of the specimens must correspond to or be smaller
than the grain size of the examined material.

2.3. Function

A specimen, normally max. 0.5 mm thick and with a diameter of 3 mm, is
placed between two immersed jets. A pump system sends a flow of
electrolyte through the jets against the specimen.
An electric circuit is established with a DC-power supply, with a cathode
placed in the electrolyte and with the specimen connected as anode.
When the electric circuit is closed, material will be removed electrolytically
from the specimen. This results in the forming of a small hole in the middle
of the specimen if the correct operating parameters have been used.
The edge of the hole will have a V-shaped cross section. The point of this
"V" will have the thickness required for the further structural examinations.
In Tenupol-3 the hole is detected by an infrared detector system, which
automatically cuts off the process. The liquid flow rate and the voltage can
be controlled from the control unit.
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