Kevin Croat

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Kevin Croat
Laboratory for Space Sciences
Physics Department, CB 1105
Washington University
1 Brookings Drive
St. Louis, MO 63130-4899, USA

Ph.D., Washington University, 2001

Compton 471

(314) 935-6225

(314) 935-6219

Dr. Croat received his PhD in Physics from Washington University in 2001. In the interdisciplinary spirit of the Laboratory for Space Sciences group, his background is in materials physics. 

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T. K. Croat, F. J. Stadermann, and T. J. Bernatowicz (2010). Unusual 29,30Si-rich SiCs of massive star origin found within graphites from the Murchison meteorite. Astronom. J. 139, pp. 2159-2169.


T. K. Croat, F. J. Stadermann, and T. J. Bernatowicz (2008). Correlated isotopic and microstructural studies of turbostratic presolar graphites from the Murchison meteorite. Meteoritics and Planetary Science 43, pp. 1497-1516.

T. K. Croat, F. J. Stadermann, and T. J. Bernatowicz (2005). Presolar graphite from AGB stars: microstructure and s-process enrichment. Astrophys. J. 631 (2), pp. 976-978.


For a complete list of publications: Publications

Selected Publications

His thesis research was done on solidification of metal alloys from the undercooled state, focusing on nanocrystallization in various metallic glasses and also containerless solidification of quasicrystal-forming alloys. He joined the group in 2001.

Dr. Croat's current research focuses on the study of the internal structure and chemistry of pre-solar grains that condensed in gaseous outflows from various stars. Many of the pre-solar grains discovered using ion probe techniques can be characterized on a finer scale using transmission electron microscopy (TEM). Using TEM, the microstructure and the phases present in pre-solar grains can be determined, as well as the chemical composition on a sub-micron scale. Recent investigations have been done on onion-like graphite structures, which are believed to have originated in supernovae due to their isotopic signatures. These graphite structures contain many internal crystals (mainly titanium carbides) which give further information about the conditions (pressure, temperature, chemical composition, etc.) in the gas from which the grains formed.

Kevin's research page: Presolar Grains: a complementary approach to studying supernovae