{"id":11390,"date":"2024-07-05T02:33:29","date_gmt":"2024-07-05T02:33:29","guid":{"rendered":"https:\/\/hsmagnet.com\/?p=11390"},"modified":"2025-09-12T06:59:11","modified_gmt":"2025-09-12T06:59:11","slug":"como-la-solidificacion-direccional-mejora-el-rendimiento-del-iman-de-alnico","status":"publish","type":"post","link":"https:\/\/hsmagnet.com\/es\/2024\/07\/05\/how-directional-solidification-enhances-alnico-magnet-performance\/","title":{"rendered":"C\u00f3mo la solidificaci\u00f3n direccional mejora el rendimiento del im\u00e1n de Alnico"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/hsmagnet.com\/magnetic-materials\/alnico-magnets\/\">Alnico magnets<\/a>, made from an alloy of <strong>aluminum, nickel, cobalt, and iron<\/strong>, are among the earliest permanent magnetic materials developed for industrial use. Even though rare-earth magnets like <strong>NdFeB<\/strong> and <strong>SmCo<\/strong> dominate many high-performance applications today, Alnico still holds an important place due to its <strong>excellent temperature stability, corrosion resistance, and long service history<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But what truly sets the performance of Alnico apart is not only its composition, but also its <strong>microstructure<\/strong>\u2014and this is where <strong>directional solidification<\/strong> plays a key role.<\/p>\n\n\n<div class=\"root-eb-toc-w11n8 wp-block-essential-blocks-table-of-contents\"><div class=\"eb-parent-wrapper eb-parent-eb-toc-w11n8 \"><div class=\"eb-toc-container eb-toc-w11n8  eb-toc-is-not-sticky eb-toc-not-collapsible eb-toc-initially-not-collapsed eb-toc-scrollToTop style-1 list-style-none\" data-scroll-top=\"false\" data-scroll-top-icon=\"fas fa-angle-up\" data-collapsible=\"false\" data-sticky-hide-mobile=\"false\" data-sticky=\"false\" data-scroll-target=\"scroll_to_toc\" data-copy-link=\"false\" data-editor-type=\"\" data-hide-desktop=\"false\" data-hide-tab=\"false\" data-hide-mobile=\"false\" data-itemcollapsed=\"false\" data-highlight-scroll=\"false\"><div class=\"eb-toc-header\"><h2 class=\"eb-toc-title\">Table of Contents<\/h2><\/div><div class=\"eb-toc-wrapper \" data-headers=\"[{&quot;level&quot;:2,&quot;content&quot;:&quot;Directional Solidification and Microstructure Control&quot;,&quot;text&quot;:&quot;Directional Solidification and Microstructure Control&quot;,&quot;link&quot;:&quot;directional-solidification-and-microstructure-control&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;The Role of Columnar Crystals&quot;,&quot;text&quot;:&quot;The Role of Columnar Crystals&quot;,&quot;link&quot;:&quot;the-role-of-columnar-crystals&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Alnico Grades Benefiting from Directional Solidification&quot;,&quot;text&quot;:&quot;Alnico Grades Benefiting from Directional Solidification&quot;,&quot;link&quot;:&quot;alnico-grades-benefiting-from-directional-solidification&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Comparison of Magnetic Properties&quot;,&quot;text&quot;:&quot;Comparison of Magnetic Properties&quot;,&quot;link&quot;:&quot;comparison-of-magnetic-properties&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Conclusion&quot;,&quot;text&quot;:&quot;Conclusion&quot;,&quot;link&quot;:&quot;conclusion&quot;}]\" data-visible=\"[true,true,true,true,true,true]\" data-delete-headers=\"[{&quot;label&quot;:&quot;Directional Solidification and Microstructure Control&quot;,&quot;value&quot;:&quot;directional-solidification-and-microstructure-control&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;The Role of Columnar Crystals&quot;,&quot;value&quot;:&quot;the-role-of-columnar-crystals&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Alnico Grades Benefiting from Directional Solidification&quot;,&quot;value&quot;:&quot;alnico-grades-benefiting-from-directional-solidification&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Comparison of Magnetic Properties&quot;,&quot;value&quot;:&quot;comparison-of-magnetic-properties&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Conclusion&quot;,&quot;value&quot;:&quot;conclusion&quot;,&quot;isDelete&quot;:false}]\" data-smooth=\"true\" data-top-offset=\"\"><div class=\"eb-toc__list-wrap\"><ul class=\"eb-toc__list\"><li><a href=\"#directional-solidification-and-microstructure-control\">Directional Solidification and Microstructure Control<\/a><li><a href=\"#the-role-of-columnar-crystals\">The Role of Columnar Crystals<\/a><li><a href=\"#alnico-grades-benefiting-from-directional-solidification\">Alnico Grades Benefiting from Directional Solidification<\/a><li><a href=\"#comparison-of-magnetic-properties\">Comparison of Magnetic Properties<\/a><li><a href=\"#conclusion\">Conclusion<\/a><\/ul><\/div><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">Directional Solidification and Microstructure Control<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When Alnico alloy is cast, the <strong>solidification process<\/strong> determines the arrangement of its grains. By carefully controlling cooling rates and thermal gradients, manufacturers can achieve <strong>directional solidification<\/strong>, where the crystal grains solidify in a preferred orientation rather than randomly.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Random solidification<\/strong> \u2192 equiaxed grains with limited magnetic anisotropy.<\/li>\n\n\n\n<li><strong>Directional solidification<\/strong> \u2192 long, aligned <strong>columnar crystals<\/strong> along the cooling direction.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These <strong>columnar grains<\/strong> are crucial because they allow the magnet to have a <strong>preferred axis of magnetization<\/strong>, greatly enhancing <strong>remanence (Br)<\/strong> and <strong>coercivity (Hc)<\/strong> compared to isotropic structures.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"847\" height=\"360\" src=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Collection-of-various-Alnico-magnet-shapes-bar-horseshoe-ring-and-their-historical-applications.webp\" alt=\"Collection of various Alnico magnet shapes (bar, horseshoe, ring) and their historical applications.\" class=\"wp-image-13721\" srcset=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Collection-of-various-Alnico-magnet-shapes-bar-horseshoe-ring-and-their-historical-applications.webp 847w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Collection-of-various-Alnico-magnet-shapes-bar-horseshoe-ring-and-their-historical-applications-300x128.webp 300w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Collection-of-various-Alnico-magnet-shapes-bar-horseshoe-ring-and-their-historical-applications-768x326.webp 768w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Collection-of-various-Alnico-magnet-shapes-bar-horseshoe-ring-and-their-historical-applications-600x255.webp 600w\" sizes=\"auto, (max-width: 847px) 100vw, 847px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">The Role of Columnar Crystals<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Columnar crystals give rise to <strong>magnetic anisotropy<\/strong> in Alnico magnets. Instead of magnetic domains being distributed in all directions, they align along a chosen axis, which improves performance in that direction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key benefits of columnar crystal formation include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Higher magnetic energy product (BHmax)<\/strong> \u2192 more powerful magnets.<\/li>\n\n\n\n<li><strong>Improved coercivity (Hc)<\/strong> \u2192 stronger resistance to demagnetization.<\/li>\n\n\n\n<li><strong>Optimized remanence (Br)<\/strong> \u2192 stronger retained magnetism.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This microstructural engineering makes Alnico magnets especially effective in <strong>sensors, measuring instruments, and high-temperature applications<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Alnico Grades Benefiting from Directional Solidification<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification.webp\" alt=\"Infographic comparing magnetic properties (coercivity, remanence) of Alnico magnets before and after directional solidification.\" class=\"wp-image-13722\" srcset=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification.webp 1024w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification-300x300.webp 300w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification-150x150.webp 150w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification-768x768.webp 768w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification-600x600.webp 600w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/Infographic-comparing-magnetic-properties-coercivity-remanence-of-Alnico-magnets-before-and-after-directional-solidification-100x100.webp 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Several <strong>Alnico magnet grades<\/strong> specifically rely on directional solidification and columnar crystal control:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Alnico 5DG (Directional Grain)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Produced using directional solidification techniques.<\/li>\n\n\n\n<li>Features columnar grains aligned with the magnetization axis.<\/li>\n\n\n\n<li>Offers higher anisotropy and better energy product than standard Alnico 5.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Alnico 5-7<\/strong>\n<ul class=\"wp-block-list\">\n<li>A higher coercivity grade derived from controlled grain growth and specialized heat treatment.<\/li>\n\n\n\n<li>Used in applications requiring resistance to demagnetizing forces.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Alnico 9<\/strong>\n<ul class=\"wp-block-list\">\n<li>The highest coercivity grade among Alnicos.<\/li>\n\n\n\n<li>Achieved through precise control of solidification and grain refinement.<\/li>\n\n\n\n<li>Provides strong demagnetization resistance, making it suitable for demanding magnetic circuits.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Alnico 5 (China LNG44 vs LNG40)<\/strong>\n<ul class=\"wp-block-list\">\n<li>In China, a special Alnico 5 grade known as <strong>LNG44<\/strong> shows improved magnetic performance compared with the common <strong>LNG40<\/strong>.<\/li>\n\n\n\n<li>This is because <strong>LNG44 develops columnar crystals early in the solidification process<\/strong>, which enhances anisotropy and results in higher magnetic strength.<\/li>\n\n\n\n<li>LNG44 is often chosen when applications require <strong>better remanence and energy product<\/strong> than standard Alnico 5 can provide.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Comparison of Magnetic Properties<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Grade<\/th><th>Remanence (Br, kGs)<\/th><th>Coercivity (Hc, Oe)<\/th><th>Energy Product (BHmax, MGOe)<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td><strong><a href=\"https:\/\/hsmagnet.com\/tag\/alnico-5-magnets\/\">Alnico 5 <\/a>(LNG40)<\/strong><\/td><td>12.5 \u2013 13.0<\/td><td>600 \u2013 650<\/td><td>5.0 <\/td><td>Standard Alnico 5, widely used.<\/td><\/tr><tr><td><strong>Alnico 5 (LNG44)<\/strong><\/td><td>13.0-13.2<\/td><td>620 \u2013 680<\/td><td>5.5 <\/td><td>Early columnar crystals improve performance vs LNG40.<\/td><\/tr><tr><td><strong>Alnico 5DG<\/strong><\/td><td>13.0-13.5<\/td><td>650 \u2013 700<\/td><td>6.5<\/td><td>Directional grain, strong anisotropy.<\/td><\/tr><tr><td><strong>Alnico 5-7<\/strong><\/td><td>13.2 \u2013 13.5<\/td><td>680-720<\/td><td>7.5<\/td><td>Higher coercivity, excellent demagnetization resistance.<\/td><\/tr><tr><td><strong>Alnico 9<\/strong><\/td><td>10.2-10.5<\/td><td>1500-1600<\/td><td>9.8-10.2<\/td><td>Highest coercivity among Alnicos, specialized uses.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>(Values are typical ranges; actual data may vary slightly by manufacturer.)<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The advancement of Alnico magnets is not only about alloy composition, but also about <strong>mastering the solidification process<\/strong>. Through <strong>directional solidification<\/strong> and the deliberate creation of <strong>columnar crystals<\/strong>, engineers have been able to significantly enhance the magnetic properties of Alnico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Grades like <strong>Alnico 5DG, Alnico 5-7, Alnico 9, and China\u2019s LNG44<\/strong> are prime examples of how <strong>microstructural control<\/strong> can transform performance, allowing Alnico magnets to continue playing a vital role in specialized industries\u2014even in the era of rare-earth magnets.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alnico magnets, made from an alloy of aluminum, nickel, cobalt, and iron, are among the earliest permanent magnetic materials developed for industrial use. Even though rare-earth magnets like NdFeB and SmCo dominate many high-performance applications today, Alnico still holds an important place due to its excellent temperature stability, corrosion resistance, and long service history. But [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13720,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[25],"tags":[],"class_list":["post-11390","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alnico-magnet"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Directional Solidification Enhances Alnico Magnet Performance - Hangzhou HS Magnet Co.,Ltd.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hsmagnet.com\/es\/2024\/07\/05\/como-la-solidificacion-direccional-mejora-el-rendimiento-del-iman-de-alnico\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Directional Solidification Enhances Alnico Magnet Performance - Hangzhou HS Magnet Co.,Ltd.\" \/>\n<meta property=\"og:description\" content=\"Alnico magnets, made from an alloy of aluminum, nickel, cobalt, and iron, are among the earliest permanent magnetic materials developed for industrial use. Even though rare-earth magnets like NdFeB and SmCo dominate many high-performance applications today, Alnico still holds an important place due to its excellent temperature stability, corrosion resistance, and long service history. But [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hsmagnet.com\/es\/2024\/07\/05\/como-la-solidificacion-direccional-mejora-el-rendimiento-del-iman-de-alnico\/\" \/>\n<meta property=\"og:site_name\" content=\"Hangzhou HS Magnet Co.,Ltd.\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-05T02:33:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-12T06:59:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2024\/07\/High-quality-close-up-of-an-Alnico-magnet.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Jacky Wang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jacky Wang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/\"},\"author\":{\"name\":\"Jacky Wang\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#\\\/schema\\\/person\\\/2042961b22b388427c42af00bf3eb9fd\"},\"headline\":\"How Directional Solidification Enhances Alnico Magnet Performance\",\"datePublished\":\"2024-07-05T02:33:29+00:00\",\"dateModified\":\"2025-09-12T06:59:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/\"},\"wordCount\":564,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/hsmagnet.com\\\/wp-content\\\/uploads\\\/2024\\\/07\\\/High-quality-close-up-of-an-Alnico-magnet.webp\",\"articleSection\":[\"Alnico Magnet\"],\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/\",\"url\":\"https:\\\/\\\/hsmagnet.com\\\/2024\\\/07\\\/05\\\/how-directional-solidification-enhances-alnico-magnet-performance\\\/\",\"name\":\"How Directional Solidification Enhances Alnico Magnet Performance - 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Hangzhou HS Magnet Co., Ltd.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/hsmagnet.com\/es\/2024\/07\/05\/como-la-solidificacion-direccional-mejora-el-rendimiento-del-iman-de-alnico\/","og_locale":"es_ES","og_type":"article","og_title":"How Directional Solidification Enhances Alnico Magnet Performance - Hangzhou HS Magnet Co.,Ltd.","og_description":"Alnico magnets, made from an alloy of aluminum, nickel, cobalt, and iron, are among the earliest permanent magnetic materials developed for industrial use. 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