Mechanical and Electrical Performance of Thermally Stable Au-ZnO films
Abstract
The mechanical properties, thermal stability, and electrical performance of Au–ZnO composite thin films are determined in this work. The co-deposition of ZnO with Au via physical vapor deposition leads to grain refinement over that of pure Au; the addition of 0.1 vol.% ZnO reduces the as-grown grain size by over 30%. The hardness of the as-grown films doubles with 2% ZnO, from 1.8 to 3.6 GPa as measured by nanoindentation. Films with ZnO additions greater than 0.5% show no significant grain growth after annealing at 350 °C, while pure gold and smaller additions do exhibit grain growth and subsequent mechanical softening. Films with 1% and 2% ZnO show a decrease of approximately 50% in electrical resistivity and no change in hardness after annealing. A model accounting for both changes in the interface structure between dispersed ZnO particles and the Au matrix captures the changes in mechanical and electrical resistivity. Furthermore, the addition of 1–2% ZnO co-deposited with Au provides a method to create mechanically hard and thermally stable films with a resistivity less than 80 nΩ-m. Our results complement previous studies of other alloying systems, suggesting oxide dispersion strengthened (ODS) gold shows a desirable hardness–resistivity relationship that is relatively independentmore »
- Authors:
-
- Washington State Univ., Pullman, WA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Purdue Univ., West Lafayette, IN (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1235278
- Alternate Identifier(s):
- OSTI ID: 1433395
- Report Number(s):
- SAND2015-6276J
Journal ID: ISSN 1359-6462; 606261
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scripta Materialia
- Additional Journal Information:
- Journal Volume: 91; Journal ID: ISSN 1359-6462
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; oxide dispersion strengthening; annealing; electrical resistivity; nanoindentation
Citation Formats
Schoeppner, Rachel L., Goeke, Ronald S., Moody, Neville R., and Bahr, David F. Mechanical and Electrical Performance of Thermally Stable Au-ZnO films. United States: N. p., 2015.
Web. doi:10.1016/j.actamat.2015.03.024.
Schoeppner, Rachel L., Goeke, Ronald S., Moody, Neville R., & Bahr, David F. Mechanical and Electrical Performance of Thermally Stable Au-ZnO films. United States. https://doi.org/10.1016/j.actamat.2015.03.024
Schoeppner, Rachel L., Goeke, Ronald S., Moody, Neville R., and Bahr, David F. Sat .
"Mechanical and Electrical Performance of Thermally Stable Au-ZnO films". United States. https://doi.org/10.1016/j.actamat.2015.03.024. https://www.osti.gov/servlets/purl/1235278.
@article{osti_1235278,
title = {Mechanical and Electrical Performance of Thermally Stable Au-ZnO films},
author = {Schoeppner, Rachel L. and Goeke, Ronald S. and Moody, Neville R. and Bahr, David F.},
abstractNote = {The mechanical properties, thermal stability, and electrical performance of Au–ZnO composite thin films are determined in this work. The co-deposition of ZnO with Au via physical vapor deposition leads to grain refinement over that of pure Au; the addition of 0.1 vol.% ZnO reduces the as-grown grain size by over 30%. The hardness of the as-grown films doubles with 2% ZnO, from 1.8 to 3.6 GPa as measured by nanoindentation. Films with ZnO additions greater than 0.5% show no significant grain growth after annealing at 350 °C, while pure gold and smaller additions do exhibit grain growth and subsequent mechanical softening. Films with 1% and 2% ZnO show a decrease of approximately 50% in electrical resistivity and no change in hardness after annealing. A model accounting for both changes in the interface structure between dispersed ZnO particles and the Au matrix captures the changes in mechanical and electrical resistivity. Furthermore, the addition of 1–2% ZnO co-deposited with Au provides a method to create mechanically hard and thermally stable films with a resistivity less than 80 nΩ-m. Our results complement previous studies of other alloying systems, suggesting oxide dispersion strengthened (ODS) gold shows a desirable hardness–resistivity relationship that is relatively independent of the particular ODS chemistry.},
doi = {10.1016/j.actamat.2015.03.024},
journal = {Scripta Materialia},
number = ,
volume = 91,
place = {United States},
year = {Sat Mar 28 00:00:00 EDT 2015},
month = {Sat Mar 28 00:00:00 EDT 2015}
}
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