{"id":851,"date":"2020-09-27T08:57:12","date_gmt":"2020-09-27T13:57:12","guid":{"rendered":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/?p=851"},"modified":"2020-09-27T08:57:12","modified_gmt":"2020-09-27T13:57:12","slug":"ksn-vikrant-w-rheinheimer-h-sternlicht-m-baurer-re-garcia-electrochemically-driven-abnormal-grain-growth-in-ionic-ceramics-acta-materialia-200-720-734-2020","status":"publish","type":"post","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/09\/27\/ksn-vikrant-w-rheinheimer-h-sternlicht-m-baurer-re-garcia-electrochemically-driven-abnormal-grain-growth-in-ionic-ceramics-acta-materialia-200-720-734-2020\/","title":{"rendered":"KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda &#8220;Electrochemically-driven abnormal grain growth in ionic ceramics.&#8221;  Acta Materialia 200: 720-734, 2020."},"content":{"rendered":"<p>KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda &#8220;<em>Electrochemically-driven abnormal grain growth in ionic ceramics.<\/em>&#8221; <strong>Acta Materialia<\/strong> 200: 720-734, 2020. \u00a0<a href=\"https:\/\/doi.org\/10.1016\/j.actamat.2020.08.027\">https:\/\/doi.org\/10.1016\/j.actamat.2020.08.027<\/a><\/p>\n<p>&nbsp;<\/p>\n<h3>Abstract<\/h3>\n<p>A combined theoretical and experimental analysis was performed to understand the effects of extrinsic ionic species and point defects on the microstructural evolution of ionic polycrystalline ceramics. The model naturally incorporates the effects of drag on grain boundary motion as imposed by the interfacially accumulated charged defects for Fe doped SrTiO<sub>3<\/sub>. Two moving grain boundary types, i.e., highly mobile and immobile interfaces result in abnormal grain growth. Fast moving grain boundaries leave a residual charge network behind in the interior of the grains in the form of bands of<span class=\"Apple-converted-space\">\u00a0<\/span><span class=\"math\"><span id=\"MathJax-Element-1-Frame\" class=\"MathJax_SVG\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; display: inline-block; font-style: normal; font-weight: normal; line-height: normal; font-size: 16.200000762939453px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; position: relative;\" tabindex=\"0\" role=\"presentation\" data-mathml=\"&lt;math xmlns=&quot;http:\/\/www.w3.org\/1998\/Math\/MathML&quot;&gt;&lt;mrow is=&quot;true&quot;&gt;&lt;mo is=&quot;true&quot;&gt;[&lt;\/mo&gt;&lt;msubsup is=&quot;true&quot;&gt;&lt;mtext is=&quot;true&quot;&gt;Fe&lt;\/mtext&gt;&lt;mtext is=&quot;true&quot;&gt;Ti&lt;\/mtext&gt;&lt;mo is=&quot;true&quot;&gt;&amp;#x2032;&lt;\/mo&gt;&lt;\/msubsup&gt;&lt;mo is=&quot;true&quot;&gt;]&lt;\/mo&gt;&lt;mo is=&quot;true&quot;&gt;,&lt;\/mo&gt;&lt;\/mrow&gt;&lt;\/math&gt;\"><\/span>\u00a0[Fe&#8217;<sub>Ti<\/sub>] which in turn electrostatically attract oxygen vacancies, thus enhancing the local ionic conductivity of the polycrystal. Three grain size populations are statistically identified: (a) a <em>normal<\/em> grain population, as one would expect would happen in classical systems; (b) an <em>abnormal<\/em>, large grain population, which corresponds to those grains whose spatial extent is statistically greater than the average; and (c) an <em>electrochemically persistent<\/em> small grain size population that is stabilized by the grain boundary electrical energy. The study herein sets the stage to assess the effects of externally applied fields such as temperature, electromagnetic fields, stresses, and chemical stimuli to develop textured, oriented microstructures as tailored for a wide range of applications.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p class=\"post-excerpt\" class=\"post-excerpt\">KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda &#8220;Electrochemically-driven abnormal&hellip;<\/p>\n<div class=\"link-more\"><a href=\"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/09\/27\/ksn-vikrant-w-rheinheimer-h-sternlicht-m-baurer-re-garcia-electrochemically-driven-abnormal-grain-growth-in-ionic-ceramics-acta-materialia-200-720-734-2020\/\">Continue reading<span class=\"screen-reader-text\"> &#8220;KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda &#8220;Electrochemically-driven abnormal grain growth in ionic ceramics.&#8221;  Acta Materialia 200: 720-734, 2020.&#8221;<\/span>&hellip;<\/a><\/div>\n<div class=\"link-more\"><a href=\"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/09\/27\/ksn-vikrant-w-rheinheimer-h-sternlicht-m-baurer-re-garcia-electrochemically-driven-abnormal-grain-growth-in-ionic-ceramics-acta-materialia-200-720-734-2020\/\">Continue reading<span class=\"screen-reader-text\"> \"KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda &#8220;Electrochemically-driven abnormal grain growth in ionic ceramics.&#8221;  Acta Materialia 200: 720-734, 2020.\"<\/span>&hellip;<\/a><\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[45],"tags":[76,6,10,14,48],"class_list":["post-851","post","type-post","status-publish","format-standard","hentry","category-papers","tag-charged-grain-boundaries","tag-electrochemistry","tag-grain-boundaries","tag-microstructures","tag-phase-field","entry"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/peeeSR-dJ","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":873,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/10\/31\/ksn-vikrant-w-rheinheimer-re-garcia-electrochemical-drag-effect-on-grain-boundary-motion-in-ionic-ceramics-npj-computational-materials-6165-2020\/","url_meta":{"origin":851,"position":0},"title":"KSN Vikrant, W Rheinheimer, RE Garc\u00eda &#8220;Electrochemical drag effect on grain boundary motion in ionic ceramics.&#8221; npj Computational Materials. 6:165, (2020).","author":"redwing","date":"10\/31\/2020","format":false,"excerpt":"KSN Vikrant, W Rheinheimer, RE Garc\u00eda \"Electrochemical drag effect on grain boundary motion in ionic ceramics.\" npj Computational Materials. 6:165, (2020). \u00a0https:\/\/doi.org\/10.1038\/s41524-020-00418-z Abstract The effects of drag imposed by extrinsic ionic species and point defects on the grain boundary motion of ionic polycrystalline ceramics were quantified for the generality of\u2026","rel":"","context":"In &quot;Papers&quot;","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1013,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2026\/08\/01\/ksn-vikrant-re-garcia-electrically-charged-dislocations-in-ionic-ceramics-acta-materialia-121778-2025\/","url_meta":{"origin":851,"position":1},"title":"KSN Vikrant, RE Garc\u00eda &#8220;Electrically charged dislocations in ionic ceramics.&#8221; Acta Materialia, 121778, 2025.","author":"redwing","date":"08\/01\/2026","format":false,"excerpt":"KSN Vikrant, RE Garc\u00eda \"Electrically charged dislocations in ionic ceramics.\" Acta Materialia, 121778, 2025. https:\/\/doi.org\/10.1016\/j.actamat.2025.121778 Abstract A thermodynamically consistent phase field theory describing coupled electrical, chemical, and mechanical effects on charged dislocations in ionic ceramics is presented. The formulation results in a generalized multiphysical Peach\u2013K\u00f6hler force, establishing a critical electro-chemo-mechanical\u2026","rel":"","context":"In &quot;Papers&quot;","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1004,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2026\/08\/01\/cm-bishop-ksn-vikrant-re-garcia-ferroelectric-grain-boundary-complexion-transitions-acta-materialia-293-121043-2025\/","url_meta":{"origin":851,"position":2},"title":"CM Bishop, KSN Vikrant, RE Garc\u00eda &#8220;Ferroelectric grain boundary complexion transitions.&#8221; Acta Materialia 293: 121043, 2025.","author":"redwing","date":"08\/01\/2026","format":false,"excerpt":"CM Bishop, KSN Vikrant, RE Garc\u00eda \"Ferroelectric grain boundary complexion transitions.\" Acta Materialia 293: 121043, 2025. https:\/\/doi.org\/10.1016\/j.actamat.2025.121043 Abstract By starting from equilibrium volumetric and\u00a0interfacial properties\u00a0of\u00a0ferroelectric materials, a thermodynamically-consistent phase field framework incorporating polarization and\u00a0space charge\u00a0for\u00a0polycrystalline\u00a0ferroelectrics is developed. Building on Cahn\u2019s\u00a0critical point\u00a0wetting variational analysis, a series of planar\u00a0[001]\u00a0tilt\u00a0grain boundaries in tetragonal\u2026","rel":"","context":"In &quot;Papers&quot;","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":854,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/10\/01\/rl-grosso-ksn-vikrant-l-feng-ens-muccillo-dnf-muche-gs-jawaharram-cm-barr-am-monterrosa-rhr-castro-re-garcia-k-hattar-sj-dillon-ultrahigh-temperature-in-situ-transmission-electron-microsco\/","url_meta":{"origin":851,"position":3},"title":"RL Grosso, KSN Vikrant,  RE Garc\u00eda, K Hattar, SJ Dillon, et al. &#8220;Ultrahigh Temperature in situ Transmission Electron Microscopy based Bicrystal Coble Creep in Zirconia II: Interfacial Thermodynamics and Transport Mechanisms.&#8221;  Acta Materialia, 200:1008-1021, 2020.","author":"redwing","date":"10\/01\/2020","format":false,"excerpt":"RL Grosso KSN Vikrant, L Feng, ENS Muccillo, DNF Muche, GS Jawaharram, CM Barr, AM Monterrosa, RHR Castro, RE Garc\u00eda, K Hattar, SJ Dillon \"Ultrahigh Temperature in situ Transmission Electron Microscopy based Bicrystal Coble Creep in Zirconia II: Interfacial Thermodynamics and Transport Mechanisms.\"\u00a0Acta Materialia, 200:1008-1021, 2020.\u00a0https:\/\/doi.org\/10.1016\/j.actamat.2020.08.070 Abstract This work uses\u2026","rel":"","context":"In &quot;Papers&quot;","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":806,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2019\/02\/20\/k-s-n-vikrant1-and-r-edwin-garcia-charged-grain-boundary-transitions-in-ionic-ceramics-for-energy-applications-npj-computational-materials-2019524-https-doi-org-10-1038-s41524-019-0159\/","url_meta":{"origin":851,"position":4},"title":"K. S. N. Vikrant and R. Edwin Garc\u00eda &#8220;Charged grain boundary transitions in ionic ceramics for energy applications.&#8221; npj Computational Materials (2019)5:24","author":"redwing","date":"02\/20\/2019","format":false,"excerpt":"K. S. N. Vikrant and R. Edwin Garc\u00eda \"Charged grain boundary transitions in ionic ceramics for energy applications.\" npj Computational Materials (2019)5:24; https:\/\/doi.org\/10.1038\/s41524-019-0159-2. abstract Surfaces and interfaces in ionic ceramics play a pivotal role in defining the transport limitations in many of the existing and emerging applications in energy-related systems\u2026","rel":"","context":"In &quot;Papers&quot;","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":849,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/09\/27\/ksn-vikrant-rl-grosso-re-garcia-k-hattar-sj-dillon-et-al-ultrahigh-temperature-in-situ-transmission-electron-microscopy-based-bicrystal-coble-creep-in-zirconia-i-nanowire-growth-and-interfaci\/","url_meta":{"origin":851,"position":5},"title":"KSN Vikrant, RL Grosso, RE Garc\u00eda, K Hattar, SJ Dillon et al.  &#8220;Ultrahigh Temperature in situ Transmission Electron Microscopy based Bicrystal Coble Creep in Zirconia I: Nanowire Growth and Interfacial Diffusivity.&#8221; Acta Materialia 199:530-541,  2020.","author":"redwing","date":"09\/27\/2020","format":false,"excerpt":"KSN Vikrant, RL Grosso, L. Feng, ENS Muccillo, DNF Muche, GS Jawaharram, CM Barr, AM Monterrosa, RHR Castro, RE Garc\u00eda, K Hattar, SJ Dillon\u00a0 \"Ultrahigh Temperature in situ Transmission Electron Microscopy based Bicrystal Coble Creep in Zirconia I: Nanowire Growth and Interfacial Diffusivity.\" Acta Materialia 199:530-541, 2020.\u00a0https:\/\/doi.org\/10.1016\/j.actamat.2020.08.069 Abstract This work\u2026","rel":"","context":"In &quot;Papers&quot;","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/comments?post=851"}],"version-history":[{"count":2,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/851\/revisions"}],"predecessor-version":[{"id":853,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/851\/revisions\/853"}],"wp:attachment":[{"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/media?parent=851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/categories?post=851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/tags?post=851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}