{"id":792,"date":"2025-12-23T16:57:26","date_gmt":"2025-12-23T08:57:26","guid":{"rendered":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/?post_type=paper&#038;p=792"},"modified":"2025-12-23T16:57:26","modified_gmt":"2025-12-23T08:57:26","slug":"multifunctional-b4c-scb2c2-composites-with-high-fracture-toughness-electro-machinability-and-superior-laser-resistance","status":"publish","type":"paper","link":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/paper\/multifunctional-b4c-scb2c2-composites-with-high-fracture-toughness-electro-machinability-and-superior-laser-resistance\/","title":{"rendered":"Multifunctional B4C-ScB2C2\u00a0composites with high fracture toughness, electro-machinability, and superior laser resistance"},"content":{"rendered":"\n<p><strong>Author<\/strong>:Chaona\u00a0Liu\u00a0<sup>abc1<\/sup>,\u00a0Li\u00a0Tian\u00a0<sup>c1<\/sup>,\u00a0Yueming\u00a0Li\u00a0<sup>d<\/sup>,\u00a0Fuyuan\u00a0Zheng\u00a0<sup>c<\/sup>,\u00a0Yunhui\u00a0Li\u00a0<sup>b<\/sup>,\u00a0Qingming\u00a0Xu\u00a0<sup>b<\/sup>,\u00a0Jianwei\u00a0Zhu\u00a0<sup>b<\/sup>,\u00a0Wenfei\u00a0Li\u00a0<sup>ab<\/sup>,\u00a0Guorui\u00a0Zhao\u00a0<sup>c<\/sup><\/p>\n\n\n\n<p><strong>Jurnal:<\/strong>Composites Part A: Applied Science and Manufacturing<\/p>\n\n\n\n<p><strong>DOI:<\/strong><a rel=\"noreferrer noopener\" href=\"https:\/\/doi.org\/10.1016\/j.compositesa.2025.109527\" target=\"_blank\">https:\/\/doi.org\/10.1016\/j.compositesa.2025.109527<\/a><\/p>\n\n\n\n<p><strong>Abstract \/\u00a0\u6458\u8981<\/strong><\/p>\n\n\n\n<p>This work overcomes the long-standing brittleness and poor machinability of B<sub>4<\/sub>C by\u00a0in-situ\u00a0introduced conductive ScB<sub>2<\/sub>C<sub>2<\/sub>\u00a0network via reactive hot-pressing. The optimized composite containing 20\u00a0vol% ScB<sub>2<\/sub>C<sub>2<\/sub>\u00a0(BS-20) achieves a record fracture toughness of\u00a0\u223c\u00a010.5\u00a0MPa\u00b7m<sup>1\/2<\/sup>\u2014over twice that of monolithic B<sub>4<\/sub>C\u2014enabled by residual stress fields from thermal-expansion mismatch and atomically coherent interfaces that promote crack deflection and bridging. Simultaneously, the percolating ScB<sub>2<\/sub>C<sub>2<\/sub>\u00a0network enables a semiconductor-to-conductor transition (\u223c 0.65\u00a0\u00d7\u00a010<sup>3<\/sup>\u00a0S\/m), thereby unlocking electro-discharge machining of complex geometries, a critical advance for practical deployment. Furthermore, the BS-20 composite demonstrated exceptional laser ablation resistance, sustaining high power densities (up to\u00a0\u223c\u00a01.6\u00a0\u00d7\u00a010<sup>7<\/sup>\u00a0W\/cm<sup>2<\/sup>) without catastrophic failure, due to enhanced mechanical properties, energy dissipation and protective oxide scale formation. This work introduces a new class of damage-tolerant, electro-machinable, and laser-resistant B<sub>4<\/sub>C-based composites, establishing a generalizable strategy for designing multifunctional ceramics capable of reliable performance in extreme environments spanning aerospace, defense, and precision engineering.<\/p>\n\n\n\n<p><strong>Keyword \/\u00a0\u5173\u952e\u8bcd<\/strong><\/p>\n\n\n\n<p>Boron carbide; In situ reaction; Thermopressed sintering; Rare-earth ternary layered ceramics<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"533\" height=\"430\" src=\"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S1359835X2500822X-gr5.jpg\" alt=\"\" class=\"wp-image-793\" srcset=\"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S1359835X2500822X-gr5.jpg 533w, https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-content\/uploads\/sites\/20\/2025\/12\/1-s2.0-S1359835X2500822X-gr5-300x242.jpg 300w\" sizes=\"(max-width: 533px) 100vw, 533px\" \/><\/figure><\/div>","protected":false},"featured_media":793,"template":"","acf":[],"_links":{"self":[{"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/paper\/792"}],"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\/793"}],"wp:attachment":[{"href":"https:\/\/frontbasic.sslab.org.cn\/ceramics\/wp-json\/wp\/v2\/media?parent=792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}