{"id":13759,"date":"2017-10-16T06:59:30","date_gmt":"2017-10-16T04:59:30","guid":{"rendered":"http:\/\/karmaka.de\/?p=13759"},"modified":"2017-10-16T06:59:30","modified_gmt":"2017-10-16T04:59:30","slug":"atom-probe-tomography-and-transmission-electron-microscopy-of-the-kamacite-taenite-interface-in-the-fast-cooled-bristol-iva-iron-meteorite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=13759","title":{"rendered":"Atom-probe tomography and transmission electron microscopy of the kamacite\u2013taenite interface in the fast-cooled Bristol IVA iron meteorite."},"content":{"rendered":"<p>Rout, S. S., Heck, P. R., Isheim, D., Stephan, T., Zaluzec, N. J., Miller, D. J., Davis, A. M. and Seidman, D. N.<\/p>\n<p>Meteoritics &#038; Planetary Science. doi: 10.1111\/maps.12988<\/p>\n<p><a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.12988\/abstract\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p>&#8220;We report the first combined atom-probe tomography (APT) and transmission electron microscopy (TEM) study of a kamacite\u2013tetrataenite (K\u2013T) interface region within an iron meteorite, Bristol (IVA). Ten APT nanotips were prepared from the K\u2013T interface with focused ion beam scanning electron microscopy (FIB-SEM) and then studied using TEM followed by APT. Near the K-T interface, we found 3.8 \u00b1 0.5 wt% Ni in kamacite and 53.4 \u00b1 0.5 wt% Ni in tetrataenite. High-Ni precipitate regions of the cloudy zone (CZ) have 50.4 \u00b1 0.8 wt% Ni. A region near the CZ and martensite interface has <10 nm sized Ni-rich precipitates with 38.4 \u00b1 0.7 wt% Ni present within a low-Ni matrix having 25.5 \u00b1 0.6 wt% Ni. We found that Cu is predominantly concentrated in tetrataenite, whereas Co, P, and Cr are concentrated in kamacite. Phosphorus is preferentially concentrated along the K-T interface. This study is the first precise measurement of the phase composition at high spatial resolution and in 3-D of the K-T interface region in a IVA iron meteorite and furthers our knowledge of the phase composition changes in a fast-cooled iron meteorite below 400 \u00b0C. We demonstrate that APT in conjunction with TEM is a useful approach to study the major, minor, and trace elemental composition of nanoscale features within fast-cooled iron meteorites.\"\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rout, S. S., Heck, P. R., Isheim, D., Stephan, T., Zaluzec, N. J., Miller, D. J., Davis, A. M. and Seidman, D. N. Meteoritics &#038; Planetary Science. doi: 10.1111\/maps.12988 LINK &#8220;We report the first combined&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[214,255],"tags":[4231,1874,1877],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13759"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13759"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13759\/revisions"}],"predecessor-version":[{"id":13760,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13759\/revisions\/13760"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13759"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}