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A dynamic SEM study of solution‐precipitation processes in carbon deposition
Author(s) -
Brown A. M.,
Hill M. P.
Publication year - 1989
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1989.tb01467.x
Subject(s) - dissolution , deposition (geology) , precipitation , scanning electron microscope , carbon fibers , chemical engineering , materials science , morphology (biology) , transition metal , phase (matter) , catalysis , chemistry , geology , composite material , organic chemistry , paleontology , physics , sediment , meteorology , composite number , engineering
In situ high resolution scanning electron microscopy (SEM) has been used to study carbon deposition processes occurring in the Fe/CH 4 reaction at temperatures of 620–850°C. The morphology of deposits formed by carbon dissolution and precipitation processes has been investigated. The development of particulate‐type deposits has been examined. These are associated with the enhancement of catalytic activity of transition metals and the break‐up of the metal structure as the deposition reaction progresses. A mobile Fe‐C phase has been observed that can explain how complex carbon morphologies develop.