Physics
Scientific paper
Feb 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008m%26ps...43...87m&link_type=abstract
Meteoritics & Planetary Science, vol. 43, Issue 1, p.87-96
Physics
9
Tem, Stardust Mission, Xanes
Scientific paper
Hypervelocity capture of material in aerogel can expose particles to high transient temperatures. We tested some of the possible effects of capture by using a light-gas gun to shoot particles of basalt glass into aerogel at 6.1 km s-1. Using synchrotron-based micro-X-ray absorption spectroscopy (μXAS), we find that the starting material, in which the Fe was trivalent, is chemically reduced to divalent. In addition, some fragments were chemically reduced so that they contained Fe0 in a form spectroscopically consistent with a mixture of two forms of iron carbide (cohenite and haxonite). The carbon presumably originated from organic impurities in the aerogel. High-resolution transmission electron microscopy (HRTEM) imaging shows the presence of Fe-rich crystalline nanoparticles. A similar species has been found in actual Stardust material, suggesting that “smelting” effects occurred during capture and should be taken into account when interpreting data on Stardust samples.
Burchell Mark J.
Fakra Sirine
Kearsley Anton
Keller Lindsay P.
Marcus Mathew A.
No associations
LandOfFree
Smelting of Fe-bearing glass during hypervelocity capture in aerogel does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Smelting of Fe-bearing glass during hypervelocity capture in aerogel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Smelting of Fe-bearing glass during hypervelocity capture in aerogel will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1324286