{"id":794,"date":"2025-12-23T17:02:33","date_gmt":"2025-12-23T09:02:33","guid":{"rendered":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/?post_type=paper&#038;p=794"},"modified":"2025-12-23T17:03:12","modified_gmt":"2025-12-23T09:03:12","slug":"hierarchical-design-of-porous-yb2c2-ceramics-from-printed-filaments-to-aligned-grains","status":"publish","type":"paper","link":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/paper\/hierarchical-design-of-porous-yb2c2-ceramics-from-printed-filaments-to-aligned-grains\/","title":{"rendered":"Hierarchical design of porous YB2C2\u00a0ceramics: From printed filaments to aligned grains"},"content":{"rendered":"\n<p><strong>Author<\/strong>:Jie&nbsp;Yang&nbsp;<sup>abc1<\/sup>,&nbsp;Hao&nbsp;Zhang&nbsp;<sup>c1<\/sup>,&nbsp;Yueming&nbsp;Li&nbsp;<sup>d<\/sup>,&nbsp;Zhongli&nbsp;Zhu&nbsp;<sup>ab<\/sup>,&nbsp;Yunhui&nbsp;Li&nbsp;<sup>ab<\/sup>,&nbsp;Qingming&nbsp;Xu&nbsp;<sup>ab<\/sup>,&nbsp;Guorui&nbsp;Zhao&nbsp;<sup>c<\/sup><\/p>\n\n\n\n<p><strong>Jurnal:<\/strong><a href=\"https:\/\/www.sciencedirect.com\/journal\/journal-of-alloys-and-compounds\">Journal of Alloys and Compounds<\/a><\/p>\n\n\n\n<p><strong>DOI:<\/strong><a rel=\"noreferrer noopener\" href=\"https:\/\/doi.org\/10.1016\/j.jallcom.2025.185127\" target=\"_blank\">https:\/\/doi.org\/10.1016\/j.jallcom.2025.185127<\/a><\/p>\n\n\n\n<p><strong>Abstract \/&nbsp;\u6458\u8981<\/strong><\/p>\n\n\n\n<p>Controlling crystallographic texture and pore architecture in porous ultra-high temperature ceramics is critical for tailoring their performance in extreme environments, yet achieving this dual control remains a formidable challenge. Here, we demonstrate a novel strategy to fabricate architected porous YB<sub>2<\/sub>C<sub>2<\/sub>&nbsp;ceramics exhibiting strong crystallographic and mechanical property anisotropy by synergizing powder extrusion printing with&nbsp;<em>in-situ<\/em>&nbsp;reaction synthesis. The core of our approach is a templated-growth mechanism, where shear forces during extrusion align sacrificial graphite flakes within the green body. These aligned flakes subsequently serve as heterogeneous nucleation and growth sites for plate-like YB<sub>2<\/sub>C<sub>2<\/sub>&nbsp;grains during boro\/carbothermal reduction, effectively translating the macro-scale printed path into a micro-scale crystallographic texture. This process yields a remarkable hierarchical structure, featuring unidirectionally aligned pores and a strong [001] crystallographic texture parallel to the printing direction. The resulting ceramics exhibit a highly tunable porosity (50\u201375\u202fvol%) and exceptional compressive strength, reaching 76.7\u202f\u00b1\u202f14.7\u202fMPa at \u223c50\u202f% porosity. Crucially, this microstructural control imparts a pronounced mechanical anisotropy, a key attribute for designing components with directionally dependent loads. This work establishes a new paradigm for manufacturing ultra-high temperature ceramics, enabling the concurrent design of geometry and crystallographic texture to achieve tailored thermomechanical properties.<\/p>\n\n\n\n<p><strong>Keyword \/&nbsp;\u5173\u952e\u8bcd<\/strong><\/p>\n\n\n\n<p>YB<sub>2<\/sub>C<sub>2<\/sub>; Porous ceramics; Anisotropy; Powder extrusion printing; Additive manufacturing<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"640\" src=\"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S0925838825066915-ga1_lrg-1-1024x640.jpg\" alt=\"\" class=\"wp-image-797\" srcset=\"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S0925838825066915-ga1_lrg-1-1024x640.jpg 1024w, https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S0925838825066915-ga1_lrg-1-300x188.jpg 300w, https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S0925838825066915-ga1_lrg-1-768x480.jpg 768w, https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S0925838825066915-ga1_lrg-1.jpg 1417w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>","protected":false},"featured_media":796,"template":"","acf":[],"_links":{"self":[{"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/paper\/794"}],"collection":[{"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/paper"}],"about":[{"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/types\/paper"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/media\/796"}],"wp:attachment":[{"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/media?parent=794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}