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Title: Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus

Abstract

Nanoindentation has been used to measure the elastic modulus of 5 and 18 μm thick high-purity vapor deposited polycrystalline lithium films at 31 °C. Over indentation depths ranging from 150 to 1100 nm, the modulus is found to vary with film thickness from 9.8 GPa ± 11.9% to 8.2 GPa ± 14.5%. These results are well within the range of lithium's orientation dependent elastic modulus, which spans approximately 3.1 to 21.4 GPa. The measured values may also indicate (111) and (100) texture for the 5 and 18 μm thick films, respectively. The potential effects of pileup and surface contamination are found to be negligible if any at all. Small but discernible changes in damping capability near the free surface may provide insight into the subsurface defect structure and the potential for localized heating. In conclusion, numerous experimental challenges are addressed and key metrics are used to validate the measured elastic modulus.

Authors:
 [1];  [1]; ORCiD logo [2];  [3]
  1. Michigan Technological Univ., Houghton, MI (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. International Advanced Research Centre for Powder Metallurgy and New Materials, Telangana (India)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1474863
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research
Additional Journal Information:
Journal Volume: 33; Journal Issue: 10; Journal ID: ISSN 0884-2914
Publisher:
Materials Research Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; nano-indentation; elastic properties; film

Citation Formats

Herbert, Erik G., Hackney, Stephen A., Dudney, Nancy J., and Phani, P. Sudharshan. Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus. United States: N. p., 2018. Web. doi:10.1557/jmr.2018.83.
Herbert, Erik G., Hackney, Stephen A., Dudney, Nancy J., & Phani, P. Sudharshan. Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus. United States. doi:10.1557/jmr.2018.83.
Herbert, Erik G., Hackney, Stephen A., Dudney, Nancy J., and Phani, P. Sudharshan. Fri . "Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus". United States. doi:10.1557/jmr.2018.83. https://www.osti.gov/servlets/purl/1474863.
@article{osti_1474863,
title = {Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus},
author = {Herbert, Erik G. and Hackney, Stephen A. and Dudney, Nancy J. and Phani, P. Sudharshan},
abstractNote = {Nanoindentation has been used to measure the elastic modulus of 5 and 18 μm thick high-purity vapor deposited polycrystalline lithium films at 31 °C. Over indentation depths ranging from 150 to 1100 nm, the modulus is found to vary with film thickness from 9.8 GPa ± 11.9% to 8.2 GPa ± 14.5%. These results are well within the range of lithium's orientation dependent elastic modulus, which spans approximately 3.1 to 21.4 GPa. The measured values may also indicate (111) and (100) texture for the 5 and 18 μm thick films, respectively. The potential effects of pileup and surface contamination are found to be negligible if any at all. Small but discernible changes in damping capability near the free surface may provide insight into the subsurface defect structure and the potential for localized heating. In conclusion, numerous experimental challenges are addressed and key metrics are used to validate the measured elastic modulus.},
doi = {10.1557/jmr.2018.83},
journal = {Journal of Materials Research},
number = 10,
volume = 33,
place = {United States},
year = {2018},
month = {5}
}

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Cited by: 8 works
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