{"id":970,"date":"2026-07-31T18:59:55","date_gmt":"2026-07-31T23:59:55","guid":{"rendered":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/?p=970"},"modified":"2026-07-31T18:59:57","modified_gmt":"2026-07-31T23:59:57","slug":"c-shen-t-niu-b-yang-j-cho-z-shang-t-sun-a-shang-r-e-garcia-h-wang-x-zhang-micromechanical-properties-and-microstructures-of-ac-and-dc-flash-sintered-alumina-materials-science-and-engi","status":"publish","type":"post","link":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2026\/07\/31\/c-shen-t-niu-b-yang-j-cho-z-shang-t-sun-a-shang-r-e-garcia-h-wang-x-zhang-micromechanical-properties-and-microstructures-of-ac-and-dc-flash-sintered-alumina-materials-science-and-engi\/","title":{"rendered":"C. Shen, T Niu, B. Yang, J. Cho, Z Shang, T Sun, A Shang, R E Garc\u00eda, H Wang, X Zhang “Micromechanical properties and microstructures of AC and DC flash-sintered alumina.” Materials Science and Engineering: A 866:144631, 2023"},"content":{"rendered":"\n

C. Shen, T Niu, B. Yang, J. Cho, Z Shang, T Sun, A Shang, R E Garc\u00eda, H Wang, X Zhang “Micromechanical properties and microstructures of AC and DC flash-sintered alumina.<\/em>” Materials Science and Engineering: A<\/strong> 866:144631, 2023. https:\/\/doi.org\/10.1016\/j.msea.2023.144631<\/a><\/p>\n\n\n\n

Abstract<\/h2>\n\n\n\n

Alumina<\/a>\u00a0(\u03b1-Al2<\/sub>O3<\/sub>), one of the most widely used\u00a0structural ceramics<\/a>\u00a0for industrial applications, requires high temperature and long sintering time to achieve a fully dense structure through conventional pressureless consolidation and sintering methods. Recently, several attempts have been made to reduce sintering time and temperature of Al2<\/sub>O3<\/sub>\u00a0through the application of electric field with limited success. In this study, alternating current (AC) and direct current (DC) flash sintering techniques were employed to obtain high-density Al2<\/sub>O3<\/sub>\u00a0within 10\u00a0min. The density of flash-sintered (FS) specimens was greater than the specimens prepared by the pressureless sintering technique (hereinafter designated as conventional sintering) at the same temperature for 10\u00a0h. Furthermore, AC technique can reduce the electric field necessary for flash sintering substantially comparing to the DC flash sintering. The\u00a0microindentation<\/a>\u00a0measurements reveal that the AC-FS Al2<\/sub>O3<\/sub>\u00a0provides the highest fracture toughness and a high hardness among all sintered specimens. The improved mechanical properties of AC-FS Al2<\/sub>O3<\/sub>\u00a0are attributed to defects, such as dislocations as well as stacking faults observed in the FS specimens. This study provides a fresh perspective on the low-energy manufacturing of\u00a0structural ceramics<\/a>\u00a0with improved properties.<\/p>\n","protected":false},"excerpt":{"rendered":"

C. Shen, T Niu, B. Yang, J. Cho, Z Shang, T Sun,…<\/p>\n

Continue reading “C. Shen, T Niu, B. Yang, J. Cho, Z Shang, T Sun, A Shang, R E Garc\u00eda, H Wang, X Zhang “Micromechanical properties and microstructures of AC and DC flash-sintered alumina.” Materials Science and Engineering: A 866:144631, 2023″<\/span>…<\/a><\/div>\n
Continue reading \"C. Shen, T Niu, B. Yang, J. Cho, Z Shang, T Sun, A Shang, R E Garc\u00eda, H Wang, X Zhang “Micromechanical properties and microstructures of AC and DC flash-sintered alumina.” Materials Science and Engineering: A 866:144631, 2023\"<\/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":[75,58],"class_list":["post-970","post","type-post","status-publish","format-standard","hentry","category-papers","tag-flash-sintering","tag-nanostructures","entry"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/peeeSR-fE","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":764,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2018\/05\/15\/high-temperature-deformability-of-ductile-flash-sintered-ceramics\/","url_meta":{"origin":970,"position":0},"title":"J. Cho, Q. Li, H. Wang, Z. Fan, J. Li, S. Xue, K. S. N. Vikrant, H. Wang, T. B. Holland, A. K. Mukherjee, R. E. Garc\u00eda, X. Zhang \u201cHigh temperature deformability of ductile flash-sintered ceramics via in-situ compression.\u201d Nature Communications. 9: 2063 (2018).","author":"redwing","date":"05\/15\/2018","format":false,"excerpt":"J. Cho, Q. Li, H. Wang, Z. Fan, J. Li, S. Xue, K. S. N. Vikrant, H. Wang, T. B. Holland, A. K. Mukherjee, R. E. Garc\u00eda, X. Zhang \u201cHigh temperature deformability of ductile flash-sintered ceramics via in-situ compression.\u201d Nature Communications. 9:2063 (2018). https:\/\/doi.org\/10.1038\/s41467-018-04333-2 Abstract Flash sintering has attracted significant\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":817,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2019\/10\/19\/j-li-j-cho-j-ding-h-charalambous-s-xue-h-wang-x-l-phuah-j-jian-x-wang-c-ophus-t-tsakalakos-r-e-garcia-a-k-mukherjee-n-bernstein-c-s-hellberg-h-wang-x-zhang-nanoscale\/","url_meta":{"origin":970,"position":1},"title":"J. Li, J. Cho, J. Ding, H. Charalambous, S. Xue, H. Wang, X.L. Phuah, J. Jian, X. Wang, C. Ophus, T. Tsakalakos, R.E. Garc\u00eda, A.K. Mukherjee, N. Bernstein, C.S. Hellberg, H. Wang, X. Zhang “Nanoscale stacking fault\u2013assisted room temperature plasticity in flash-sintered TiO2.” Science Advances. 5 (9): eaaw5519, 2019.","author":"redwing","date":"10\/19\/2019","format":false,"excerpt":"J. Li, J. Cho, J. Ding, H. Charalambous, S. Xue, H. Wang, X.L. Phuah, J. Jian, X. Wang, C. Ophus, T. Tsakalakos, R.E. Garc\u00eda, A.K. Mukherjee, N. Bernstein, C.S. Hellberg, H. Wang, X. Zhang \"Nanoscale stacking fault\u2013assisted room temperature plasticity in flash-sintered TiO2.\" Science Advances. 5 (9):eaaw5519, 2019;\u00a0https:\/\/advances.sciencemag.org\/content\/5\/9\/eaaw5519?intcmp=trendmd-adv abstract Ceramic\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":970,"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":847,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2020\/09\/27\/ksn-vikrant-h-wang-a-jana-h-wang-re-garcia-flash-sintering-incubation-kinetics-npj-computational-materials-61-1-8-2020\/","url_meta":{"origin":970,"position":3},"title":"KSN Vikrant, H Wang, A Jana, H Wang, RE Garc\u00eda “Flash sintering incubation kinetics” npj Computational Materials 6(1): 1-8, 2020.","author":"redwing","date":"09\/27\/2020","format":false,"excerpt":"KSN Vikrant, H Wang, A Jana, H Wang, RE Garc\u00eda \"Flash sintering incubation kinetics.\" npj Computational Materials 6(1): 1-8, 2020. \u00a0https:\/\/doi.org\/10.1038\/s41524-020-00359-7 Abstract The microstructural mechanisms leading to onset of the flash sintering are demonstrated experimentally and theoretically for Yttria Stabilized Zirconia, YSZ. Three regimes leading to flash event are identified:\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":879,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2021\/01\/21\/k-s-n-vikrant-x-l-phuah-j-lund-han-wang-c-s-hellberg-n-bernstein-w-rheinheimer-c-m-bishop-h-wang-and-r-e-garcia-modeling-of-flash-sintering-of-ionic-ceramics-mrs-bulletin-janua\/","url_meta":{"origin":970,"position":4},"title":"K.S.N. Vikrant, X.L. Phuah, J. Lund, Han Wang, C.S. Hellberg, N. Bernstein, W. Rheinheimer, C.M. Bishop, H. Wang, and R.E. Garc\u00eda “Modeling of flash sintering of ionic ceramics.” MRS Bulletin, 46(1):67-75, 2021.","author":"redwing","date":"01\/21\/2021","format":false,"excerpt":"K.S.N. Vikrant, X.L. Phuah, J. Lund, Han Wang, C.S. Hellberg, N. Bernstein, W. Rheinheimer, C.M. Bishop, H. Wang, and R.E. Garc\u00eda \"Modeling of flash sintering of ionic ceramics.\" MRS Bulletin, 46(1):67-75, 2021.\u00a0doi:10.1557\/s43577-020-00012-0 abstract A fundamental understanding of the influence of defects in ionic ceramics at the atomic, microstructural, and macroscopic\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":777,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2018\/09\/11\/sk-jha-xl-phuah-j-luo-cp-grigoropoulos-h-wang-e-garcia-b-reeja%e2%80%90jayan-the-effects-of-external-fields-in-ceramic-sintering-journal-of-the-american-ceramics-society-in-press-se\/","url_meta":{"origin":970,"position":5},"title":"SK Jha, XL Phuah, J Luo, CP Grigoropoulos, H Wang, E Garc\u00eda, B. Reeja\u2010Jayan. “The effects of external fields in ceramic sintering.” Journal of the American Ceramics Society. 102(1):5-31, 2019.","author":"redwing","date":"09\/11\/2018","format":false,"excerpt":"SK Jha, XL Phuah, J Luo, CP Grigoropoulos, H Wang, E Garc\u00eda, B. Reeja\u2010Jayan. \"The effects of external fields in ceramic sintering.\" Journal of the American Ceramics Society. 102(1):5-31, 2019. https:\/\/doi.org\/10.1111\/jace.16061 Abstract Field\u2010assisted processing techniques can enhance the kinetics of powder synthesis, accelerate sintering processes, and drive phase transformations at\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\/970","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=970"}],"version-history":[{"count":1,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/970\/revisions"}],"predecessor-version":[{"id":971,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/posts\/970\/revisions\/971"}],"wp:attachment":[{"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/media?parent=970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/categories?post=970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/wp-json\/wp\/v2\/tags?post=970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}