On the mechanism of secondary pop-out in cyclic nanoindentation of single-crystal silicon

Hu Huang, Jiwang Yan

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In cyclic nanoindentation of single-crystal silicon, an interesting phenomenon of a secondary pop-out event that closely follows the first pop-out event but with a larger critical load than the first is presented. Cyclic nanoindentation experiments under various loading/unloading rates and various maximum indentation loads were performed to verify the generality of the phenomenon of two pop-out events. Raman spectroscopy results indicate that the secondary pop-out does not induce any new phase, and the dominated end phases after the two pop-out events are still a mixture of Si-XII/Si-III phases. According to average contact pressure analysis, the phase transformation paths and the formation mechanism for the secondary pop-out event are discussed from the viewpoint of crystal nucleation and growth. The results indicate that phase transformations from the Si-I phase to Si-XII/Si-III phases are completed by two pop-out events in two adjacent indentation cycles, and the Si-XII/Si-III phases formed in previous indentation cycles strongly affect the phase transformations in subsequent loading/unloading processes.

Original languageEnglish
Pages (from-to)1861-1868
Number of pages8
JournalJournal of Materials Research
Volume30
Issue number11
DOIs
Publication statusPublished - 2015 Apr 24

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Silicon
Nanoindentation
nanoindentation
Indentation
Phase transitions
Single crystals
Unloading
single crystals
silicon
indentation
phase transformations
unloading
Raman spectroscopy
Nucleation
Crystals
cycles
Experiments
nucleation
crystals

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

Cite this

On the mechanism of secondary pop-out in cyclic nanoindentation of single-crystal silicon. / Huang, Hu; Yan, Jiwang.

In: Journal of Materials Research, Vol. 30, No. 11, 24.04.2015, p. 1861-1868.

Research output: Contribution to journalArticle

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