{"id":12367,"date":"2025-11-06T14:37:06","date_gmt":"2025-11-06T13:37:06","guid":{"rendered":"https:\/\/www.baikowski.com\/?p=12367"},"modified":"2026-01-22T14:44:30","modified_gmt":"2026-01-22T13:44:30","slug":"sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics","status":"publish","type":"post","link":"https:\/\/www.baikowski.com\/en\/sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics\/","title":{"rendered":"SMA6 and Embedded 3D Printing for Multi-Material Ceramics"},"content":{"rendered":"<h2>How to Overcome Challenges in Multi-material Ceramic Manufacturing Challenges ?<\/h2>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-9308 alignleft\" src=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2024\/06\/ceramic-dispersing-system-part-300x290.jpg\" alt=\"Ceramic 3D printing parts with SLA method\" width=\"297\" height=\"287\" \/><\/strong><\/p>\n<p>Combining dissimilar materials inside dense ceramics has been a long-standing hurdle: conventional routes rarely deliver microstructural precision and preserved density. Additive manufacturing helped, but<strong> robocasting in air<\/strong> still constrains geometry and material pairings. The promising alternative\u2014<strong>embedded 3D printing<\/strong> within a self-healing support\u2014had proved difficult to translate to dense inorganic systems.<\/p>\n<p>That changed when Imperial College London demonstrated an embedded route built on <strong>Baikowski\u2019s SMA6<\/strong>.<br \/>\nIn work titled <strong><a href=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2025\/10\/Embedded-3D-printing-of-microstructured.pdf\">Embedded 3D printing of microstructured multi-material composites<\/a> <\/strong>and published in <em>Matter<\/em> (February 2024) , the team extruded complex architectures into a self-healing ceramic gel that yields to the nozzle and rapidly recovers, then\u2014after controlled drying, debinding, and sintering\u2014<strong>converts to dense alumina<\/strong>.<\/p>\n<p>The study report <strong>defect-free, multi-material composites<\/strong> with sharp interfaces, opening design space for internal reinforcements and microchannels that conventional processing couldn\u2019t reach.<\/p>\n<h2>SMA6 Powder Properties<\/h2>\n<h3>Ultra-Fine Particle Engineering<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-5600 alignleft\" src=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2022\/12\/alumina.png\" alt=\"High purity alumina\" width=\"183\" height=\"183\" srcset=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2022\/12\/alumina.png 271w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2022\/12\/alumina-150x150.png 150w\" sizes=\"auto, (max-width: 183px) 100vw, 183px\" \/><strong>Baikalox\u00ae SMA6 (d\u2085\u2080 \u2248 0.2 \u00b5m)<\/strong> was selected for the work. Its tightly controlled, ultra-fine particle-size distribution supports tuning of gel viscosity, yield stress, and recovery\u2014conditions the study leveraged so the nozzle passes cleanly and the matrix self-heals.<\/p>\n<p>The approach uses gels with &gt;25 vol% powder (matrix prepared at 7:3 wt\/wt Al\u2082O\u2083:Pluronic), consistent with dense sintering of both matrix and inks. Packing was reported as uniform enough to reach ~4\u20136% porosity after firing, and dispersion control was observed to maintain sharp, porosity-free interfaces between embedded structures and the alumina matrix.<\/p>\n<h3>Powder Preparation and Gel Formulation<\/h3>\n<p>Before dispersion in <strong>Pluronic F127<\/strong>, SMA6 was sieved through a <strong>100 \u00b5m<\/strong> plastic mesh to reduce agglomerates. With an appropriate dispersant (about <strong>1 wt%<\/strong> relative to Al\u2082O\u2083), the powder forms a <strong>homogeneous, thermally reversible gel<\/strong> whose viscoelastic profile suited to to embedded printing.<\/p>\n<p><a class=\"bouton-bleu\" href=\"https:\/\/www.baikowski.com\/en\/serie\/sma\/\" target=\"_blank\" rel=\"noopener\"><strong>Learn more about SMA6<\/strong><\/a><\/p>\n<h2>How Does This Translate into Applications?<\/h2>\n<p>To validate the approach, the team demonstrated two use cases: co-sintered steel architectures that boost fracture energy without sacrificing strength, and sacrificial-graphite microchannels that deliver functional internal cooling in dense alumina.<\/p>\n<h3 style=\"padding-left: 40px;\">&#x1f31f; 1- Steel-Reinforced Alumina<\/h3>\n<p>Using SMA6-based matrices, steel architectures were <strong data-start=\"2948\" data-end=\"2976\">embedded and co-sintered<\/strong> to dense composites. Reported values include:<\/p>\n<ul>\n<li><strong>Flexural strength:<\/strong> 155\u2013289 MPa<\/li>\n<li><strong>Fracture toughness:<\/strong> 3.3\u20134.0 MPa\u00b7m\u00b9\u141f\u00b2<\/li>\n<li><strong>Work of fracture:<\/strong> up to 3.6 kJ\/m\u00b2 for auxetic lattices (\u2248 two orders of magnitude above unreinforced alumina, ~30 J\/m\u00b2)<\/li>\n<\/ul>\n<p>Auxetic frameworks can steer cracks and distribute plastic deformation in steel, contributing to higher energy absorption while maintaining strength<strong>.<\/strong><\/p>\n<h3 style=\"padding-left: 40px;\"><strong>&#x1f31f;<\/strong> 2- Advanced Thermal Management Systems<\/h3>\n<p>With sacrificial graphite printed inside the SMA6 matrix and burned out during sintering, the team produced three-dimensional microchannel arrays:<\/p>\n<ul>\n<li>Circular cross-sections approximately 200 \u03bcm diameter after sintering<\/li>\n<li>Wall thicknesses reduced to 50 \u03bcm between adjacent channels<\/li>\n<li>Cooling demonstration: in a <strong data-start=\"3769\" data-end=\"3792\">2.6 \u00d7 2.6 \u00d7 1.5 cm\u00b3<\/strong> alumina cube, water at ~<strong data-start=\"3817\" data-end=\"3833\">5.1 mL\u00b7min\u207b\u00b9<\/strong> reduced top-center temperature from <strong data-start=\"3870\" data-end=\"3889\">119 \u00b0C to 62 \u00b0C<\/strong> in ~<strong data-start=\"3894\" data-end=\"3903\">200 s<\/strong><\/li>\n<\/ul>\n<p>These results indicate practical routes to thermal-management components with complex internal geometrie.<\/p>\n<h2>How Did the Material Perform ?<\/h2>\n<p>In short, the microstructure stayed tight and the printed features held their shape after firing. Overall density landed around <strong>94\u201396%<\/strong> (\u2248 <strong>4\u20136%<\/strong> porosity). Post-sinter, filaments remained in the <strong>~70\u2013260 \u00b5m<\/strong> range, and interfaces were <strong>sharp and porosity-free<\/strong>, as confirmed by SEM\/EDX.<\/p>\n<h2>What Processing Parameters Were Reported?<\/h2>\n<p>Keep the window, and the parts keep their fidelity:<\/p>\n<ul>\n<li><strong>Drying:<\/strong> 72 \u00b1 3% RH, ~32 \u00b0C, ~2 weeks (on 16 \u00d7 16 \u00d7 16 mm cubes)<\/li>\n<li><strong>Debinding:<\/strong> 1 \u00b0C\u00b7min\u207b\u00b9 \u2192 350 \u00b0C (1 h); then 2 \u00b0C\u00b7min\u207b\u00b9 \u2192 500 \u00b0C (2 h)<\/li>\n<li><strong>Sintering<\/strong>: steel-reinforced parts to 1,450 \u00b0C (after a 600 \u00b0C step); microchannel parts to 1,550 \u00b0C<\/li>\n<\/ul>\n<h2>Which Conditions Make Embedded Printing Viable?<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-3540 alignleft\" src=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-14-300x200.jpg\" alt=\"High purity alumina (HPA) slurry drops polishing materials\" width=\"278\" height=\"185\" srcset=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-14-300x200.jpg 300w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-14-1024x683.jpg 1024w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-14-768x513.jpg 768w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-14.jpg 1500w\" sizes=\"auto, (max-width: 278px) 100vw, 278px\" \/>Five things have to line up\u2014and SMA6\u2019s PSD\/dispersion helps tick each box:<\/p>\n<ul>\n<li><strong>Viscoelastic match<\/strong> between ink and matrix<\/li>\n<li><strong>Low matrix breaking stress<\/strong> so the nozzle can move freely<\/li>\n<li><strong>Rapid matrix recovery<\/strong> so features don\u2019t slump<\/li>\n<li><strong>High ink yield stress<\/strong> to lock in filament geometry<\/li>\n<li><strong>High inorganic content<\/strong> (matrix + inks) for dense, defect-free sintering<\/li>\n<\/ul>\n<h2>Where Could This Approach Adapt in Industry?<\/h2>\n<p>The method accommodated materials with very different properties\u2014dense, hydrophilic steel and light, hydrophobic graphite\u2014within the SMA6-based system, indicating <strong>potential versatility<\/strong> across material systems.<\/p>\n<h2>Why Partner with Baikowski?<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1814 alignleft\" src=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2019\/12\/PLPN00161649A2Baikowski-2-e1751361015477-300x150.jpg\" alt=\"R&amp;D lab work at Baikowski SA\" width=\"222\" height=\"111\" srcset=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2019\/12\/PLPN00161649A2Baikowski-2-e1751361015477-300x150.jpg 300w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2019\/12\/PLPN00161649A2Baikowski-2-e1751361015477.jpg 679w\" sizes=\"auto, (max-width: 222px) 100vw, 222px\" \/>Every Additive Manufacturing line has its own window. Baikowski\u2019s wider portfolio includes specialized alumina grades for diverse processes.<br \/>\n<strong>We help you tune powder, rheology and sintering<\/strong>: custom formulations that match your process parameters, collaborative optimization to boost yield and performance, consistent quality batch after batch.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-3546 alignleft\" src=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-17-200x300.jpg\" alt=\"High purity alumina powder, slurry and tape casting\" width=\"257\" height=\"386\" srcset=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-17-200x300.jpg 200w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-17-683x1024.jpg 683w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-17-768x1151.jpg 768w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2020\/08\/Baikowski\u00ae-products-2018_\u00a9utopikphoto-17.jpg 1001w\" sizes=\"auto, (max-width: 257px) 100vw, 257px\" \/><\/strong><\/p>\n<p><strong>Can this process work with other alumina grades besides SMA6?<\/strong><br \/>\nIn principle, similar outcomes may be achievable with other ultra-fine alumina grades, but each system requires its own rheology optimization. The key is a stable, high-solids gel with matched viscoelastic properties between matrix and inks. Our team can help evaluate the most suitable Baikowski grade for a given process window.<\/p>\n<p><strong>Why is particle size so critical for this application?<\/strong><br \/>\nAccording to the study, a d\u2085\u2080 \u2248 0.2 \u00b5m supports precise control near the gel transition, enables high solids loading (&gt;25 vol%), and helps limit interfacial mixing\u2014factors associated with sharp boundaries after sintering.<\/p>\n<p><strong>How does this compare to conventional ceramic composite manufacturing?<\/strong><br \/>\nThe paper reports auxetic steel-reinforced alumina with work of fracture up to ~3.6 kJ\u00b7m\u207b\u00b2 while maintaining ~155\u2013289 MPa flexural strength\u2014performance that addresses the usual strength\u2013toughness trade-off seen with conventional approaches.<\/p>\n<p><strong>What are the practical size limitations?<\/strong><br \/>\nFeature size depends on nozzle diameter and matrix rheology. In the study, post-sinter filament diameters were ~70\u2013260 \u00b5m, with microchannel walls ~50 \u00b5m at ~0.5 mm spacing. Finer features may be possible with smaller nozzles and tailored gel formulations.<\/p>\n<h2>Take the Next Step<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-8751 alignleft\" src=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2024\/04\/3D-priting-white-paper-cover-205x300.jpg\" alt=\"Ceramic 3D printing white paper on powders and slurries adavaned solutions\" width=\"233\" height=\"341\" srcset=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2024\/04\/3D-priting-white-paper-cover-205x300.jpg 205w, https:\/\/www.baikowski.com\/wp-content\/uploads\/2024\/04\/3D-priting-white-paper-cover.jpg 672w\" sizes=\"auto, (max-width: 233px) 100vw, 233px\" \/>Developing advanced ceramic composites or exploring novel AM approaches? Baikowski offers comprehensive alumina solutions backed by dedicated technical support.<\/p>\n<p><strong>&#x1f4ac; Connect with our Experts and d<\/strong><strong>ownload our 3D Printing White Paper<\/strong> \u2014 powder selection and process optimization for ceramic AM (including SMA6 insights)<\/p>\n<div style=\"margin: 30px 0px; text-align: center;\"><a style=\"background-color: #465376; color: white; padding: 15px 30px; text-decoration: none; border-radius: 8px; font-size: 1.2em;\" href=\"https:\/\/www.baikowski.com\/wp-content\/uploads\/2024\/04\/ceramic-3D-printing-solutions-white-paper.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n&#x1f4e5; DOWNLOAD THE WHITE PAPER<br \/>\n<\/a><\/div>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"TechArticle\",\n      \"@id\": \"https:\/\/www.baikowski.com\/en\/sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics\/#techarticle\",\n      \"url\": \"https:\/\/www.baikowski.com\/en\/sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics\/\",\n      \"headline\": \"SMA6: The Key to Embedded 3D Printing for Multi-Material Ceramics\",\n      \"description\": \"How Baikowski\u00ae Baikalox\u00ae SMA6 enables embedded 3D printing inside a self-healing ceramic gel to form dense alumina with sharp interfaces\u2014supporting auxetic steel reinforcements and functional microchannels as reported in Matter (Feb 2024).\",\n      \"inLanguage\": \"en-US\",\n      \"datePublished\": \"2025-11-06T13:37:06+00:00\",\n      \"dateModified\": \"2025-11-06T13:44:25+00:00\",\n      \"author\": {\n        \"@type\": \"Organization\",\n        \"name\": \"Baikowski\u00ae\"\n      },\n      \"publisher\": {\n        \"@type\": \"Organization\",\n        \"@id\": \"https:\/\/www.baikowski.com\/en\/#organization\",\n        \"name\": \"Baikowski\u00ae\",\n        \"url\": \"https:\/\/www.baikowski.com\/en\/\"\n      },\n      \"isPartOf\": {\n        \"@type\": \"WebPage\",\n        \"@id\": \"https:\/\/www.baikowski.com\/en\/sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics\/\"\n      },\n      \"articleSection\": [\n        \"The Manufacturing Challenge Overcome with Baikalox\u00ae SMA6\",\n        \"How It Works: Embedded 3D Printing with SMA6\",\n        \"Why SMA6 Alumina Made the Difference\",\n        \"How Does This Translate into Applications?\",\n        \"How Did the Material Perform in the Study?\",\n        \"What Processing Parameters Were Reported?\",\n        \"Which Conditions Make Embedded Printing Viable?\",\n        \"How Adaptable Is It Across Industries?\",\n        \"Why Partner with Baikowski?\",\n        \"Frequently Asked Questions\"\n      ],\n      \"about\": [\n        {\"@type\":\"Material\",\"name\":\"Baikalox\u00ae SMA6 (d50 \u2248 0.2 \u00b5m)\"},\n        {\"@type\":\"DefinedTerm\",\"name\":\"Embedded 3D Printing\"},\n        {\"@type\":\"Thing\",\"name\":\"Multi-Material Ceramic Composites\"}\n      ],\n      \"keywords\": [\n        \"SMA6\",\"Baikalox\",\"Baikowski\",\"Embedded 3D Printing\",\"Multi-Material Ceramics\",\n        \"Additive Manufacturing\",\"Alumina\",\"Auxetic Reinforcement\",\"Microchannels\",\"Matter 2024\"\n      ],\n      \"citation\": {\n        \"@type\": \"ScholarlyArticle\",\n        \"name\": \"Embedded 3D printing of microstructured multi-material composites\",\n        \"author\": \"Zhou, S.; Tirichenko, I.S.; Zhang, X.; Hong, Y.; Payne, H.; Withers, P.J.; Bouville, F.; Saiz, E.\",\n        \"datePublished\": \"2024-02-01\",\n        \"isPartOf\": {\"@type\":\"Periodical\",\"name\":\"Matter\",\"volumeNumber\":\"7\"},\n        \"pagination\": \"668\u2013684\",\n        \"identifier\": \"https:\/\/doi.org\/10.1016\/j.matt.2023.10.031\"\n      },\n      \"mentions\": [\n        {\n          \"@type\": \"TechArticle\",\n          \"name\": \"Full article on Baikowski.com\",\n          \"url\": \"https:\/\/www.baikowski.com\/en\/sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics\/\"\n        },\n        {\n          \"@type\": \"CreativeWork\",\n          \"name\": \"Ceramic 3D Printing Solutions \u2013 White Paper\",\n          \"url\": \"https:\/\/www.baikowski.com\/wp-content\/uploads\/2024\/04\/ceramic-3D-printing-solutions-white-paper.pdf\"\n        }\n      ]\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/www.baikowski.com\/en\/sma6-the-key-to-embedded-3d-printing-for-multi-material-ceramics\/#faq\",\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can this process work with other alumina grades besides SMA6?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes\u2014in principle for other ultra-fine grades\u2014but each system needs its own rheology optimization. The key is a stable, high-solid gel with matched viscoelastic properties. Our team can help identify the optimal Baikowski grade for your application.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Why is particle size so critical for this application?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"The 0.2 \u00b5m d50 PSD enables precise rheology near the gel transition, supports >25 vol% solids for dense sintering, and minimizes interfacial mixing\u2014so boundaries between embedded structures and matrix remain sharp.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How does this compare to conventional ceramic composite manufacturing?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"The auxetic steel-reinforced alumina reached ~3.6 kJ\u00b7m\u207b\u00b2 work of fracture\u2014orders of magnitude above unreinforced alumina\u2014while maintaining ~155\u2013289 MPa strength, easing the traditional strength\u2013toughness trade-off.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What are the practical size limitations?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Feature size depends on nozzle diameter and matrix rheology. 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The promising alternative\u2014embedded 3D printing within a self-healing support\u2014had proved difficult to [&hellip;]<\/p>\n","protected":false},"author":1076,"featured_media":9286,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-12367","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SMA6 Enables Embedded 3D Printing in Ceramics - Baikowski\u00ae<\/title>\n<meta name=\"description\" content=\"How SMA6 makes printing inside dense alumina possible: precise rheology, sharp interfaces, and study-backed gains in strength and toughness.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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