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Quantitative electromechanical characterization of materials using conductive ceramic tips
The electromechanical properties of metallic and semiconductor materials are investigated in situ using hard, electrically conductive, vanadium carbide Berkovich tips fitted to a nanoindenter. We demonstrate that, for tip contact radii from 100nm up to about 1μm, quantitative electrical data can be...
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Published in: | Acta materialia 2014-06, Vol.71, p.153-163 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The electromechanical properties of metallic and semiconductor materials are investigated in situ using hard, electrically conductive, vanadium carbide Berkovich tips fitted to a nanoindenter. We demonstrate that, for tip contact radii from 100nm up to about 1μm, quantitative electrical data can be successfully obtained from the through-tip resistive measurements simultaneously with mechanical measurements. We outline a procedure for measuring the various resistive components of the electrical circuit that enables sample resistivity and other contact parameters to be evaluated with high precision during mechanical testing. The procedure requires that the tip-to-sample and sample-to-stage electrical contacts exhibit linear (ohmic) I–V characteristics. A gold electrical calibration standard is recommended, as well as a priori measurement of the tip area curves as a function of contact radius. |
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ISSN: | 1359-6454 1873-2453 |
DOI: | 10.1016/j.actamat.2014.02.028 |