Direct observation of amophization in load rate dependent nanoindentation studies of crystalline Si
Journal
Applied Physics Letters
Journal Volume
96
Journal Issue
25
Pages
253113-1 - 253113-3
Date Issued
2010
Author(s)
Das, C.R.
Dhara, S.
Jeng, Y.-R.
Tsai, P.-C.
Hsu, H.C.
Raj, B.
Bhaduri, A.K.
Albert, S.K.
Tyagi, A.K.
Chen, K.H.
Abstract
Indentation at very low load rate showed region of constant volume with releasing load in crystalline (c-)Si, indicating a direct observation of liquidlike amorphous phase which is incompressible under pressure. Signature of amorphization is also confirmed from load dependent indentation study where increased amount of amorphized phase is made responsible for the increasing elastic recovery of the sample with increasing load. Ex situ Raman study confirmed the presence of amorphous phase at the center of indentation. The molecular dynamic simulation has been employed to demonstrate that the effect of indentation velocities has a direct influence on c-Si during nanoindentation processes.
Publisher
American Institute of Physics
Type
journal article