Nanoindentation characterization of deformation and failure of aluminum oxynitride

J. J. Guo, K. Wang, T. Fujita, J. W. McCauley, J. P. Singh, M. W. Chen

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A systematic study of the mechanical deformation and failure of transparent ceramic aluminum oxynitride (AlON) has been conducted using a depth-sensitive nanoindentation technique combined with transmission electron microscopy (TEM) and Raman spectroscopy. Although discrete displacement bursts appear in the load-depth profiles at high applied forces, a detectable high-pressure phase transition has not been found by means of micro-Raman spectroscopy and TEM. Instead, a high density of dissociated 〈1 1 0〉 dislocations can be observed underneath the nanoindenters, suggesting that extensive plastic deformation takes place in the brittle ceramic at high contact pressures. Moreover, nanoindentation-induced micro-cracks oriented along well-defined crystallographic planes can also be observed, consistent with the low fracture toughness of AlON evaluated by an indentation method using Laugier's equation.

Original languageEnglish (US)
Pages (from-to)1671-1679
Number of pages9
JournalActa Materialia
Volume59
Issue number4
DOIs
StatePublished - Feb 1 2011

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Nanoindentation
Raman spectroscopy
Transmission electron microscopy
Aluminum
Indentation
Fracture toughness
Plastic deformation
Phase transitions
Cracks
aluminum oxynitride

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Guo, J. J. ; Wang, K. ; Fujita, T. ; McCauley, J. W. ; Singh, J. P. ; Chen, M. W. / Nanoindentation characterization of deformation and failure of aluminum oxynitride. In: Acta Materialia. 2011 ; Vol. 59, No. 4. pp. 1671-1679.
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Nanoindentation characterization of deformation and failure of aluminum oxynitride. / Guo, J. J.; Wang, K.; Fujita, T.; McCauley, J. W.; Singh, J. P.; Chen, M. W.

In: Acta Materialia, Vol. 59, No. 4, 01.02.2011, p. 1671-1679.

Research output: Contribution to journalArticle

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