Characterisation of flame-generated soot and soot-in-oil using electron tomography volume reconstructions and comparison with traditional 2D-TEM measurements


Orhan O. , Haffner-Staton E., La Rocca A., Fay M.

Tribology International, cilt.104, ss.272-284, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 104
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.triboint.2016.09.015
  • Dergi Adı: Tribology International
  • Sayfa Sayıları: ss.272-284

Özet

This work characterises soot nanoparticles by electron tomography using Weighted Back Projection algorithm and appraises the uncertainties in two-dimensional calculations by comparison with 3D parameters for flame-generated soot and diesel soot-in-oil. Bright field TEM was used to capture 2D images of soot. Large uncertainties exist in 2D-measured morphological parameters. The flame-generated particle showed an extensive 3D structure while the soot-in-oil was notably two-dimensional. Morphological parameters of flame-generated soot and diesel soot-in-oil were different; primary particles, volume, and surface area varied significantly over the range of viewing angle, with differences as large as 60%. 2D flame-generated soot volume underestimated 3D measurements by 38%; soot-in-oil 2D- and 3D-derived volumes were within 4%. 2D calculations of fractal dimension generally underestimate the 3D value. (C) 2016 The Authors. Published by Elsevier Ltd.