{"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":998,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2026\/08\/01\/s-zhou-c-shen-h-li-y-zhang-d-estrella-a-sanjuan-d-hermawan-b-tsai-j-huang-x-sheng-a-choudhury-y-chen-r-e-garcia-x-zhang-haiyan-wang-phase-boundary-assisted-flash-sinteri\/","url_meta":{"origin":970,"position":0},"title":"S. Zhou, C. Shen, H. Li, Y. Zhang, D. Estrella, A. Sanjuan, D. Hermawan, B. Tsai, J. Huang, X. Sheng, A. Choudhury, Y. Chen, R. E. Garc\u00eda, X. Zhang, Haiyan Wang “Phase-Boundary Assisted Flash Sintering of Al2O3-TiO2 Nanocomposites.” Acta Materialia. 302:121612, 2026.","author":"redwing","date":"08\/01\/2026","format":false,"excerpt":"S. Zhou, C. Shen, H. Li, Y. Zhang, D. Estrella, A. Sanjuan, D. Hermawan, B. Tsai, J. Huang, X. Sheng, A. Choudhury, Y. Chen, R. E. Garc\u00eda, X. Zhang, Haiyan Wang \"Phase-Boundary Assisted Flash Sintering of Al2O3-TiO2 Nanocomposites.\" Acta Materialia. 302:121612, 2026. https:\/\/doi.org\/10.1016\/j.actamat.2025.121612 Abstract Al2O3\u00a0is inherently challenging to flash sinter\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":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":1},"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":987,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2026\/07\/31\/chao-shen-jin-li-tongjun-niu-jaehun-cho-zhongxia-shang-yifan-zhang-anyu-shang-bo-yang-ke-xu-r-edwin-garcia-haiyan-wang-xinghang-zhang-achieving-room-temperature-plasticity-in-brittle-cera\/","url_meta":{"origin":970,"position":2},"title":"Chao Shen, Jin Li, Tongjun Niu, Jaehun Cho, Zhongxia Shang, Yifan Zhang, Anyu Shang, Bo Yang, Ke Xu, R Edwin Garc\u00eda, Haiyan Wang, Xinghang Zhang “Achieving room temperature plasticity in brittle ceramics through elevated temperature preloading.” Science Advances. 10(16): eadj4079, 2024.","author":"redwing","date":"07\/31\/2026","format":false,"excerpt":"Chao Shen, Jin Li, Tongjun Niu, Jaehun Cho, Zhongxia Shang, Yifan Zhang, Anyu Shang, Bo Yang, Ke Xu, R Edwin Garc\u00eda, Haiyan Wang, Xinghang Zhang \"Achieving room temperature plasticity in brittle ceramics through elevated temperature preloading.\" Science Advances. 10(16): eadj4079, 2024. https:\/\/doi.org\/10.1126\/sciadv.adj4079 Abstract Ceramic materials with high strength and chemical\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":3},"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":4},"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":1007,"url":"https:\/\/engineering.purdue.edu\/ComputationalMaterials\/index.php\/2026\/08\/01\/bo-yang-nicholas-richter-huan-li-zhongxia-shang-zihao-he-hongyi-dou-jianan-shen-r-edwin-garcia-noam-bernstein-c-stephen-hellberg-haiyan-wang-xinghang-zhang-dislocation-enabled-plasticity\/","url_meta":{"origin":970,"position":5},"title":"Bo Yang, Nicholas Richter, Huan Li, Zhongxia Shang, Zihao He, Hongyi Dou, Jianan Shen, R Edwin Garc\u00eda, Noam Bernstein, C Stephen Hellberg, Haiyan Wang, Xinghang Zhang “Dislocation-enabled plasticity in rutile TiO2\u2212x\u00a0at room temperature.” Nanoscale. 17 (35): 20338-20350, 2025.","author":"redwing","date":"08\/01\/2026","format":false,"excerpt":"Bo Yang, Nicholas Richter, Huan Li, Zhongxia Shang, Zihao He, Hongyi Dou, Jianan Shen, R Edwin Garc\u00eda, Noam Bernstein, C Stephen Hellberg, Haiyan Wang, Xinghang Zhang \"Dislocation-enabled plasticity in rutile TiO2\u2212x\u00a0at room temperature.\" Nanoscale. 17 (35): 20338-20350, 2025. https:\/\/doi.org\/10.1039\/d5nr02684a Abstract Ceramics are widely perceived as brittle. Recent research showed that\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}]}}