{"id":873,"date":"2020-10-31T07:00:01","date_gmt":"2020-10-31T12:00:01","guid":{"rendered":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/?p=873"},"modified":"2020-10-30T07:23:35","modified_gmt":"2020-10-30T12:23:35","slug":"ksn-vikrant-w-rheinheimer-re-garcia-electrochemical-drag-effect-on-grain-boundary-motion-in-ionic-ceramics-npj-computational-materials-6165-2020","status":"publish","type":"post","link":"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\/","title":{"rendered":"KSN Vikrant, W Rheinheimer, RE Garc\u00eda “Electrochemical drag effect on grain boundary motion in ionic ceramics.” npj Computational Materials. 6:165, (2020)."},"content":{"rendered":"

KSN Vikrant, W Rheinheimer, RE Garc\u00eda “Electrochemical drag effect on grain boundary motion in ionic ceramics<\/em>.” npj Computational Materials.<\/strong> 6:<\/b>165, (2020). \u00a0https:\/\/doi.org\/10.1038\/s41524-020-00418-z<\/a><\/p>\n

Abstract<\/h3>\n
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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 electrical, chemical, or structural driving forces. In the absence of, or for small driving forces, the extended electrochemical grain boundary remains pinned and symmetrically distributed about the structural interface. As the grain boundary begins to move, charged defects accumulate unsymmetrically about the structural grain boundary core. Above the critical driving force for motion, grain boundaries progressively shed individual ionic species, from heavier to lighter, until they display no interfacial electrostatic charge and zero Schottky potential. Ionic p\u2013n junction moving grain boundaries that induce a finite electrostatic potential difference across entire grains are identified for high velocity grains. The developed theory is demonstrated for Fe-doped SrTiO3<\/sub>. The increase in average Fe concentration and grain boundary crystallographic misorientation enhances grain boundary core segregation and results in thick space charge layers, which leads to a stronger drag force that reduces the velocity of the interface. The developed theory sets the stage to assess the effects of externally applied fields such as temperature, electromagnetic fields, and chemical stimuli to control the grain growth for developing textured, oriented microstructures desirable for a wide range of applications.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

KSN Vikrant, W Rheinheimer, RE Garc\u00eda “Electrochemical drag effect on grain boundary…<\/p>\n

Continue reading “KSN Vikrant, W Rheinheimer, RE Garc\u00eda “Electrochemical drag effect on grain boundary motion in ionic ceramics.” npj Computational Materials. 6:165, (2020).”<\/span>…<\/a><\/div>\n
Continue reading \"KSN Vikrant, W Rheinheimer, RE Garc\u00eda “Electrochemical drag effect on grain boundary motion in ionic ceramics.” npj Computational Materials. 6:165, (2020).\"<\/span>…<\/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":[76,75,10,48,7],"class_list":["post-873","post","type-post","status-publish","format-standard","hentry","category-papers","tag-charged-grain-boundaries","tag-flash-sintering","tag-grain-boundaries","tag-phase-field","tag-thermodynamics","entry"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/peeeSR-e5","jetpack_likes_enabled":true,"jetpack-related-posts":[{"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":873,"position":0},"title":"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","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 "Papers"","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":851,"url":"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\/","url_meta":{"origin":873,"position":1},"title":"KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda “Electrochemically-driven abnormal grain growth in ionic ceramics.” Acta Materialia 200: 720-734, 2020.","author":"redwing","date":"09\/27\/2020","format":false,"excerpt":"KSN Vikrant, W Rheinheimer, H Sternlicht, M B\u00e4urer, RE Garc\u00eda \"Electrochemically-driven abnormal grain growth in ionic ceramics.\" Acta Materialia 200: 720-734, 2020. \u00a0https:\/\/doi.org\/10.1016\/j.actamat.2020.08.027 \u00a0 Abstract 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\u2026","rel":"","context":"In "Papers"","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":775,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2018\/10\/09\/h-wang-xl-phuah-j-li-tb-holland-ksn-vikrant-l-qiang-cs-hellberg-n-bernstein-re-garcia-a-mukherjee-x-zhang-h-wang-key-microstructural-characteristics-in-flash-sintered-3ysz-critical-for-e\/","url_meta":{"origin":873,"position":2},"title":"H Wang, XL Phuah, J Li, TB Holland, KSN Vikrant, L Qiang, CS Hellberg, N Bernstein, RE Garc\u00eda, A Mukherjee, X Zhang, H Wang. “Key microstructural characteristics in flash sintered 3YSZ critical for enhanced sintering process.” Ceramics International. 45:1251-1257, 2019.","author":"redwing","date":"10\/09\/2018","format":false,"excerpt":"H Wang, XL Phuah, J Li, TB Holland, KSN Vikrant, L Qiang, CS Hellberg, N Bernstein, RE Garc\u00eda, A Mukherjee, X Zhang, H Wang. \"Key microstructural characteristics in flash sintered 3YSZ critical for enhanced sintering process.\" Ceramics International. 45:1251-1257, 2019. https:\/\/doi.org\/10.1016\/j.ceramint.2018.10.007 Abstract To explore the fundamental flash sintering mechanisms in\u2026","rel":"","context":"In "Papers"","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":873,"position":3},"title":"KSN Vikrant, RE Garc\u00eda “Electrically charged dislocations in ionic ceramics.” 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 "Papers"","block_context":{"text":"Papers","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/category\/papers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":761,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2018\/10\/26\/charged-interfaces-electrochemical-and-mechanical-effects\/","url_meta":{"origin":873,"position":4},"title":"V. Karra, W. Chueh, R.E. Garc\u00eda. \u201cCharged Interfaces: Electrochemical and Mechanical Effects.\u201d Energy & Environmental Science. 11:1993-2000, 2018.","author":"redwing","date":"10\/26\/2018","format":false,"excerpt":"V. Karra, W. Chueh, R.E. Garc\u00eda. \u201cCharged Interfaces: Electrochemical and Mechanical Effects.\u201d\u00a0Energy & Environmental Science. \u00a0DOI: 10.1039\/C7EE03400H. 11:1993-2000, 2018. Abstract We establish a comprehensive space-charge treatment that includes electrochemomechanical effects to physically describe the equilibrium and transport properties of charged interfaces in ion-conducting solids. The theory is consistent with the\u2026","rel":"","context":"In "Papers"","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":873,"position":5},"title":"CM Bishop, KSN Vikrant, RE Garc\u00eda “Ferroelectric grain boundary complexion transitions.” 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 "Papers"","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\/873","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=873"}],"version-history":[{"count":1,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/873\/revisions"}],"predecessor-version":[{"id":874,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/873\/revisions\/874"}],"wp:attachment":[{"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/media?parent=873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/categories?post=873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/tags?post=873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}