Influence of mechanical properties on the nanoscratch behaviour of hard nanocomposite TiN/Si3N4 coatings on Si

B. D. Beake, V. M. Vishnyakov, R. Valizadeh, J. S. Colligon

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

A dual ion beam system has been used to produce hard nanocomposite TiN/Si3N4 coatings on silicon substrate. Mechanical properties have been determined by nanoindentation and tribological properties have been measured by nanoscratch testing. Nanoindentation showed that harder nanocomposites exhibited higher ratios of hardness to modulus (H/E). The dependence of the resistance to plastic deformation (H3/E 2) on hardness was approximately linear. The H/E value influenced the nanoscratch behaviour. Coatings with higher H/E showed higher critical loads for elastic-plastic transition and also the total coating failure occurring in front of the probe. However, coatings with higher H/E also exhibited an unloading failure, occurring behind the probe at much lower load than the loading failure. Optimizing this stress-related unloading failure could be more important for tribological applications.

LanguageEnglish
Pages1392-1397
Number of pages6
JournalJournal of Physics D: Applied Physics
Volume39
Issue number7
Early online date17 Mar 2006
DOIs
Publication statusPublished - 7 Apr 2006
Externally publishedYes

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Nanocomposites
nanocomposites
mechanical properties
coatings
Coatings
Mechanical properties
unloading
Nanoindentation
nanoindentation
Unloading
hardness
Hardness
probes
Silicon
Ion beams
plastic deformation
Plastic deformation
plastics
ion beams
Plastics

Cite this

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Influence of mechanical properties on the nanoscratch behaviour of hard nanocomposite TiN/Si3N4 coatings on Si. / Beake, B. D.; Vishnyakov, V. M.; Valizadeh, R.; Colligon, J. S.

In: Journal of Physics D: Applied Physics, Vol. 39, No. 7, 07.04.2006, p. 1392-1397.

Research output: Contribution to journalArticle

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AU - Colligon, J. S.

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