Evidence for the temperature dependence of phase transformation behavior of silicon at nanoscale
- Australian National Univ., Canberra, ACT (Australia)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
This study uses the in-situ high-temperature nanoindentation coupled with electrical measurements to investigate the temperature dependence (25 to 200 C) of the phase transformation behavior of crystalline silicon (dc-Si) at the nanoscale. Along with in-situ indentation and electrical data, ex-situ characterizations such as Raman and cross-sectional transmission electron microscopy (XTEM) have been used to reveal the dominant mode of deformation under the indenter. In contrast to the previous studies, the dominant mode of deformation under the nanoindenter at elevated temperatures is not the dc-Si to metallic phase ( -Sn) transformation. Instead, XTEM images from 150 C indents reveal that the dominant mode of deformation is twinning along {111} planes. While the in-situ high-temperature electrical measurements show an increase in the current due to metallic phase formation up to 125 C, it is absent 150 C, revealing that the formation of the metallic phase is negligible in this regime. Thus, this work provides clear insight into the temperature dependent deformation mechanisms in dc-Si at the nanoscale.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1185893
- Alternate ID(s):
- OSTI ID: 1228159
- Journal Information:
- Journal of Applied Physics, Vol. 117; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
The high pressure phase transformation behavior of silicon nanowires
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journal | September 2018 |
In-situ high temperature micro-Raman investigation of annealing behavior of high-pressure phases of Si
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journal | June 2019 |
Temperature-dependent nanoindentation response of materials
|
journal | February 2018 |
Nanoindentation Induced Deformation and Pop-in Events in a Silicon Crystal: Molecular Dynamics Simulation and Experiment
|
journal | August 2017 |
Extended Applications of the Depth-Sensing Indentation Method
|
journal | November 2020 |
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