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Title: 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:
 [1];  [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 (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. https://doi.org/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}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 18 works
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Figures / Tables:

Table I 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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Works referenced in this record:

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Nanoindentation of high-purity vapor deposited lithium films: A mechanistic rationalization of diffusion-mediated flow
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  • Journal of Materials Research, Vol. 33, Issue 10
  • DOI: 10.1557/jmr.2018.84

Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus
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    Works referencing / citing this record:

    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
    • DOI: 10.1063/1.5111150

    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
    • DOI: 10.1149/2.0221902jes

    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
    • DOI: 10.1149/2.0701914jes

    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
    • DOI: 10.1557/jmr.2018.83

    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
    • DOI: 10.1557/jmr.2018.84

      Figures / Tables found in this record:

        Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.