Micro Tensile Testing
Mechanical Tester for Objects in the µm Range
Many researchers triggered interest in the different mechanical properties that micron size objects display, as compared to specimens of the macro world.
Applications: MEMS, Bonding-Technique, Crystal Growth etc.
The instrument shown in this example is a sub-stage ("module") for the SEM specimen stage, which will also work under the light microscope.
It is suitable for mechanical load experiments, such as static or oscillating tensile tests with extremely small solid bodies. In most of all cases it is quite difficult to clamp fine wires, whiskers or capillaries that have grown on specimen preparation disks or metal surfaces in order to perform tensile or dynamic tests on them. These particles are usually so fine that the operator will no longer be able to handle them manually. To get access to such dimensions, a piezo-controlled gripper mechanism was combined with a crosstable mechanics of highest displacement resolution, and a load gauge that will do fractions of µN. A fatiguing platform allows carrying out dynamic experiments.
The jaw surfaces of the "micro-tweezer" in this unit are extraordinarily resistant against mechanical damage, so that mineral objects or specimens of hard metals can be held firmly, without leaving marks behind.