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

Aradi, Emily, Rudolph, Erasmus and Derry, Trevor Edward (2012) Formation of c-BN nanoparticles by helium, lithium and boron ion implantation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 272. pp. 57-60. ISSN 0168-583X

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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 × 1014 to 1 × 1016 ions/cm2, 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

Item Type: Article
Uncontrolled Keywords: Cubic boron nitride; Ion implantation; Raman spectroscopy
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Related URLs:
Depositing User: Emily Aradi
Date Deposited: 29 Nov 2016 12:53
Last Modified: 28 Aug 2021 12:10


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