An APFIM investigation of a weathered region of the Santa Catharina meteorite.

Details An APFIM investigation of a weathered region of the Santa Catharina meteorite. An APFIM investigation of a weathered region of the Santa Catharina meteorite.

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sursc.266..441m&link_type=abstract

Surf. Sci., Vol. 266, No. 1-3, p. 441 - 445

Computer Science

Scientific paper

An atom probe field ion microscope characterization has been performed on a weathered region of the Santa Catharina meteorite (USNM No. 3043). This meteorite consists primarily of a metallic matrix, oxides, and Schreibersite (FeNi)3P. The metallic matrix was found to have decomposed into a random distribution of ≡12 nm diameter precipitates with compositions ranging from 38.6 - 54 at.% Ni in a matrix with lower nickel levels. Atom probe composition profiles between precipitates revealed a characteristic W-shaped nickel profile ranging from approximately 15% nickel adjacent to the precipitates to approximately 25% nickel in the central region away from the precipitates.

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