Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of the transition from diffusion to dislocation-mediated flow
Abstract
Nanoindentation experiments performed in high-purity vapor deposited lithium films at 31 °C reveal a strain rate and length scale dependence in the stress at which pop-in type events signal an abrupt transition from diffusion to dislocation-mediated flow. The stress level at which the transition to dislocation-mediated flow occurs varies with the strain rate and ranges from 88 to 208 times larger than the nominal yield strength of bulk, polycrystalline lithium. Variation in the indentation strain rate reveals the relationship between the stress required to initiate the transition and the length scale at which the transition occurs follows the power-law relation, hardness × depth1.17 = 1.545 N/m0.83, where the magnitude of the exponent and constant reflect the defect structure of the film. In conclusion, a rationalization of the transition is provided through direct comparisons between the measured cumulative distribution function (CDF) and the CDF hypothesized for the activation of a Frank–Read source.
- Authors:
-
[2];
- Michigan Technological Univ., Houghton, MI (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- International Advanced Research Centre for Powder Metallurgy and New Materials (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:
- 1509574
- 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
Citation Formats
Herbert, Erik G., Hackney, Stephen A., Thole, Violet, Dudney, Nancy J., and Phani, P. Sudharshan. Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of the transition from diffusion to dislocation-mediated flow. United States: N. p., 2018.
Web. doi:10.1557/jmr.2018.85.
Herbert, Erik G., Hackney, Stephen A., Thole, Violet, Dudney, Nancy J., & Phani, P. Sudharshan. Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of the transition from diffusion to dislocation-mediated flow. United States. https://doi.org/10.1557/jmr.2018.85
Herbert, Erik G., Hackney, Stephen A., Thole, Violet, Dudney, Nancy J., and Phani, P. Sudharshan. Fri .
"Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of the transition from diffusion to dislocation-mediated flow". United States. https://doi.org/10.1557/jmr.2018.85. https://www.osti.gov/servlets/purl/1509574.
@article{osti_1509574,
title = {Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of the transition from diffusion to dislocation-mediated flow},
author = {Herbert, Erik G. and Hackney, Stephen A. and Thole, Violet and Dudney, Nancy J. and Phani, P. Sudharshan},
abstractNote = {Nanoindentation experiments performed in high-purity vapor deposited lithium films at 31 °C reveal a strain rate and length scale dependence in the stress at which pop-in type events signal an abrupt transition from diffusion to dislocation-mediated flow. The stress level at which the transition to dislocation-mediated flow occurs varies with the strain rate and ranges from 88 to 208 times larger than the nominal yield strength of bulk, polycrystalline lithium. Variation in the indentation strain rate reveals the relationship between the stress required to initiate the transition and the length scale at which the transition occurs follows the power-law relation, hardness × depth1.17 = 1.545 N/m0.83, where the magnitude of the exponent and constant reflect the defect structure of the film. In conclusion, a rationalization of the transition is provided through direct comparisons between the measured cumulative distribution function (CDF) and the CDF hypothesized for the activation of a Frank–Read source.},
doi = {10.1557/jmr.2018.85},
journal = {Journal of Materials Research},
number = 10,
volume = 33,
place = {United States},
year = {2018},
month = {5}
}
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Figures / Tables:
Table I: Values of β and 𝜆𝐿𝑎𝑣𝑒3 used to calculate the CDF of the transition stress as per Eq. (7) and the experimentally measured Weibull mean value, 𝐻ℎ.
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Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation
journal, July 2019
- Wang, Yikai; Dang, Dingying; Wang, Ming
- Applied Physics Letters, Vol. 115, Issue 4
Lithium Mechanics: Roles of Strain Rate and Temperature and Implications for Lithium Metal Batteries
journal, January 2019
- LePage, William S.; Chen, Yuxin; Kazyak, Eric
- Journal of The Electrochemical Society, Vol. 166, Issue 2
Rethinking How External Pressure Can Suppress Dendrites in Lithium Metal Batteries
journal, January 2019
- Zhang, Xin; Wang, Q. Jane; Harrison, Katharine L.
- Journal of The Electrochemical Society, Vol. 166, Issue 15
Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus
journal, May 2018
- Herbert, Erik G.; Hackney, Stephen A.; Dudney, Nancy J.
- Journal of Materials Research, Vol. 33, Issue 10
Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of diffusion-mediated flow
journal, May 2018
- Herbert, Erik G.; Hackney, Stephen A.; Thole, Violet
- Journal of Materials Research, Vol. 33, Issue 10
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.