Epsilon carbide - A low-temperature component of interplanetary dust particles

Details Epsilon carbide - A low-temperature component of interplanetary dust particles Epsilon carbide - A low-temperature component of interplanetary dust particles

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983sci...222.1327c&link_type=abstract

Science (ISSN 0036-8075), vol. 222, Dec. 23, 1983, p. 1327-1329.

Physics

27

Carbides, Cosmochemistry, Interplanetary Dust, Atmospheric Entry, Crystal Structure, Electron Microscopy, Iron, Nickel, Solar System

Scientific paper

Transmission electron microscope study of a chondritic interplanetary dust particle has revealed the presence of epsilon iron-nickel carbide, a low-temperature carbide previously encountered only in metallurgical studies. In these studies ɛ-carbide was synthesized by carburization of iron or nickel grains in a stream of carbon monoxide or carbon monoxide plus hydrogen. Similar carburization of an iron-nickel metal in situ may have produced ɛ-carbide during particle heating on atmospheric entry or in solar orbit. Alternatively, the ɛ-carbide may be a by-product of Fischer-Tropsch reactions in the solar nebula. Such reactions have been proposed as the mechanism of hydrocarbon formation in the early solar system.

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