Nanocontact measurements in superlattices
Abstract
Many metallic superlattices are known to exhibit dramatic anomalous elastic properties as a function of modulation wavelength. All measurements to date measure either a shear modulus or a longitudinal modulus in the superlattice plane. Here we present a method which also probes longitudinal elastic behavior perpendicular to the layers using a nano-hardness tester. In this method, a diamond tip is indented into the material and both the indentation depth and applied force are constantly monitored during loading and unloading. The elastic properties are extracted from the unloading part of the force versus displacement curve. Contrary to the anomaly found in a shear modulus, no anomaly in Young's modulus was found in the present study on Mo/Ni superlattices.
- Publication:
-
Presented at the Materials Research Society Fall Meeting
- Pub Date:
- 1986
- Bibcode:
- 1986mrs..meetQ....B
- Keywords:
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- Hardness Tests;
- Load Tests;
- Modulus Of Elasticity;
- Shear Properties;
- Superlattices;
- Displacement;
- Indentation;
- Molybdenum;
- Nickel;
- Solid-State Physics