TY - JOUR
T1 - Formation of c-BN nanoparticles by helium, lithium and boron ion implantation
AU - Aradi, E.
AU - Erasmus, R.M.
AU - Derry, T.E.
PY - 2011/2/2
Y1 - 2011/2/2
N2 - 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.
AB - 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.
KW - Cubic boron nitritde
KW - Ion implantation
KW - Raman spectroscopy
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84655170047&partnerID=MN8TOARS
U2 - 10.1016/j.nimb.2011.01.032
DO - 10.1016/j.nimb.2011.01.032
M3 - Article
SN - 0168-583X
VL - 272
SP - 57
EP - 60
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
ER -