Effect of superlattice layer elastic moduli on hardness

M. Shinn*, S. A. Barnett

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

Abstract

Epitaxial V0.6Nb0.4N/NbN superlattices have been deposited on MgO(100) by reactive magnetron sputtering. The V 0.6Nb0.4N alloy was chosen for one layer, rather than VN, in order to reduce the lattice mismatch from 5.7% to 3.5%, allowing growth of superlattices with relatively planar layers. The elastic moduli of NbN and V0.6Nb0.4N are nearly equal, in contrast to previously studied high-hardness nitride superlattices where the layer moduli differed substantially. Vickers microhardness measurements showed no measurable deviation (<4 GPa) from alloy values. The results verify that the difference in layer elastic moduli is the primary parameter determining nitride superlattice hardening.

Original languageEnglish (US)
Pages (from-to)61-63
Number of pages3
JournalApplied Physics Letters
Volume64
Issue number1
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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