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Title: Evidence for the temperature dependence of phase transformation behavior of silicon at nanoscale

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4921534· OSTI ID:1185893
 [1];  [1];  [2];  [1];  [1];  [1]
  1. Australian National Univ., Canberra, ACT (Australia)
  2. 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
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (5)

The high pressure phase transformation behavior of silicon nanowires journal September 2018
In-situ high temperature micro-Raman investigation of annealing behavior of high-pressure phases of Si 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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