Nanodiamond stability with friction and heat

Electron Microscopy and Analysis Group Conference 2015

Butterworth, J.^1 ; Briston, K.^1 ; Claeyssens, F.^1 ; Inkson, B.J.^1

NanoLAB Centre, Department of Materials Science and Engineering, University of Sheffield, Sheffield, United Kingdom^1

关键词: Modified surfaces;    Ni catalysts;    Nonspherical particle;    Onion-like carbon;    Pre-Treatment;    Structural stabilities;    Thermal-annealing;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012022/pdf
DOI  :  10.1088/1742-6596/644/1/012022

来源: IOP

【 摘 要 】

The structural stability of nanodiamonds (ND) has been investigated as a function of abrasion/friction and thermal annealing. Nanodiamonds examined before and after abrasion by transmission electron microscopy (TEM) are found to have modified surface characteristics. Frictional rubbing generates smaller, non-spherical particles with rougher, cleaner surfaces, and debris consisting of compacted ND+amorphous carbons. Annealing of ND and abraded ND at 1000°C demonstrates that abrasive pre-treatment increases proportion of transformation to onion-like-carbon (OLC) structures with generation of 3-30nm diameter OLC. The OLC achieved are of similar dimensions to those grown from ND annealed with a Ni catalyst but with more defective microstructures.