Strain and deformation in ultra-hard nanocomposites nc-TiN/a-BN under hydrostatic pressure

Stephen G. Prilliman, Simon M. Clark*, A. Paul Alivisatos, Pavla Karvankova, Stan Vepřek

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

A high pressure diffraction study, from ambient to 50 GPa, has been carried out on nanocrystalline TiN/amorphous BN nanocomposite materials prepared by plasma chemical vapor deposition. The compressibilities of these materials were found not to be significantly different from TiN. A large amount of biaxial and isotropic strain was found to build up on pressurization which continued to exist after depressurization and annealing indicating a permanent deformation under high pressure. This permanent deformation is located in the grain boundaries and is reduced by the presence of amorphous BN.

Original languageEnglish
Pages (from-to)379-387
Number of pages9
JournalMaterials Science and Engineering A
Volume437
Issue number2
DOIs
Publication statusPublished - 15 Nov 2006
Externally publishedYes

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