Nanoidentation Study of the Mechanical Properties of Granular Metal Thin Films
- 1 January 1993
- journal article
- Published by Springer Nature in MRS Proceedings
Abstract
Nanoindenter techniques have been used to investigate the mechanical properties of Ag-Al2O3 and Fe-SiO2 granular metal films. A discontinuity in the rate of change of hardness as a function of metal volume fraction p was observed. The discontinuity occurs at the percolation threshold pc of the metal, and appears to result from a change in the deformation mechanism at pc. A large peak in compliance (inverse modulus) as measured during indentation unloading was observed in the Ag-Al2O3 films near pc, but was not observed for the Fe-SiO2 films. The compliance peak displayed by Ag-Al2O3 is believed to result from debonding at the metal-ceramic interface and subsequent interfacial sliding, and is not an intrinsic materials property.Keywords
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