Formation of c-BN nanoparticles by helium, lithium and boron ion implantation

Emily Aradi, Rudolph M. Erasmus, Trevor E. Derry

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ion induced phase transformation from the soft graphitic hexagonal boron nitride (h-BN) to ultrahard cubic boron nitride (c-BN) nanoparticles is presented in the work herein. Ion implantation was used as a technique to introduce boron lithium and helium ions, at the energy of 150 keV and fluences ranging from 1 × 10 14 to 1 × 10 16 ions/cm 2, into hot pressed, polycrystalline h-BN. Analyses using Raman Spectroscopy showed that He +, Li + and B + led to a h-BN to c-BN phase transition, evident from the longitudinal optical (LO) Raman phonon features occurring in the implanted samples' spectra. The nature of these phonon peaks and their downshifting is explained using the spatial phonon correlation model.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume272
DOIs
Publication statusPublished - 1 Feb 2012
Externally publishedYes

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