کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1680902 | 1518745 | 2012 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation of c-BN nanoparticles by helium, lithium and boron ion implantation
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 150Â keV and fluences ranging from 1Â ÃÂ 1014 to 1Â ÃÂ 1016Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 272, 1 February 2012, Pages 57-60
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 272, 1 February 2012, Pages 57-60
نویسندگان
Emily Aradi, Rudolph M. Erasmus, Trevor E. Derry,