Nanoindentation of high-purity vapor deposited lithium films: The elastic modulus
- 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, Telangana (India)
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1474863
- Journal Information:
- Journal of Materials Research, Vol. 33, Issue 10; ISSN 0884-2914
- Publisher:
- Materials Research SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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