Journal
TRIBOLOGY LETTERS
Volume 44, Issue 2, Pages 139-149Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-011-9831-5
Keywords
Single particle; Carbon; Soot structure; Friction; Wear; Hardness; TEM
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Funding
- Indian Oil Corporation Limited (RD), Faridabad
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Ethylene gas is burnt and the soot generated is sampled thermophoretically at different heights along the flame axis starting from a region close to the root of the flame. The morphology and crystallinity of the particle are recorded using high resolution transmission electron microscopes. The hardness of a single particle is measured using a nanoindenter. The frictional resistance and material removal of a particle are measured using an atomic force microscope. The particles present in the mid-flame region are found to have a crystalline shell. The ones at the flame root are found to be highly disordered and the ones at the flame tip and above have randomly distributed pockets of short range order. The physical state of a particle is found to relate, but not very strongly, with the mechanical and tribological properties of the particles.
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