{"id":9008,"date":"2025-07-18T15:09:58","date_gmt":"2025-07-18T07:09:58","guid":{"rendered":"https:\/\/am-material.com\/?p=9008"},"modified":"2025-07-18T15:10:00","modified_gmt":"2025-07-18T07:10:00","slug":"al2o3-nano-particles-on-cocrni-lpbf-part","status":"publish","type":"post","link":"https:\/\/am-material.com\/de\/news\/al2o3-nano-particles-on-cocrni-lpbf-part\/","title":{"rendered":"Effect of Al2O3 nano-particles on properties of CoCrNi LPBF part"},"content":{"rendered":"

Effect of Al2O3 nano-particles on properties of CoCrNi LPBF part<\/strong><\/h2>\n\n\n\n

Experiment<\/strong><\/p>\n\n\n\n

This study used CoCrNi alloy powder and Al\u2082O\u2083 powder as raw materials. CoCrNi alloy powder was prepared by vacuum gas atomization, and the powder particle size range was 15-53 \u03bcm. The particle size of Al\u2082O\u2083 powder was 38-74 \u03bcm. After the raw material powders were mixed, they were processed on the LPBF additive manufacturing system.<\/p>\n\n\n\n

Chemical composition of CoCrNi:<\/strong><\/strong><\/p>\n\n\n\n

\"\"
<\/figcaption><\/figure>\n\n\n\n

Morphology of CoCrNi:<\/strong><\/p>\n\n\n\n

\"\"
<\/figcaption><\/figure>\n\n\n\n

Microstructure analysis:<\/strong><\/p>\n\n\n\n

After adding Al2O2, the grains in the CoCrNi matrix are significantly refined, and a large number of nano-scale Al2O2 precipitates are formed. These precipitates are distributed along the boundaries and effectively hindering the movement of dislocations.<\/p>\n\n\n\n

\"\"
<\/figcaption><\/figure>\n\n\n\n

Mechanical properties:<\/strong><\/p>\n\n\n\n

Compression test results show that the ultimate compressive strength and hardness of CoCrNi parts increase significantly with the addition of Al\u2082O\u2083. In particular, when the Al\u2082O\u2083 content is 7.5 wt%, the ultimate compressive strength reaches 1143 MPa, the fracture strain is 29.8%, and the hardness is 300 HV. These performance improvements are mainly attributed to mechanisms such as grain refinement, dislocation strengthening, and second phase strengthening.<\/p>\n\n\n\n

\"\"
<\/figcaption><\/figure>\n\n\n\n

Conclusion:<\/strong><\/p>\n\n\n\n

In this study, Al\u2082O\u2083-reinforced CoCrNi metal matrix composites were successfully prepared by LPBF technology, and the effect of Al\u2082O\u2083 addition on the material microstructure evolution and mechanical properties was systematically studied. The results show that adding an appropriate amount of Al\u2082O\u2083 can significantly improve the mechanical properties of CoCrNi LPBF parts. This study provides a new way to develop high-performance metal matrix composites.<\/p>\n\n\n\n

Other Mid- & High-Entropy Alloy Powders produced by TRUER:<\/strong><\/p>\n\n\n\n

CoCrNi, FeCoNiCr, FeCoNiCrMn, FeCoNiCrAl, FeCoNiCrMo, FeCoNiCrTi, FeCoNiCrV, FeCoNiCrCu<\/p>","protected":false},"excerpt":{"rendered":"

Effect of Al2O3 nano-particles on properties of CoCrNi LPBF part Experiment This study used CoCrNi alloy powder and Al\u2082O\u2083 powder as raw materials. CoCrNi alloy powder was prepared by vacuum gas atomization, and the powder particle size range was 15-53 \u03bcm. The particle size of Al\u2082O\u2083 powder was 38-74 \u03bcm. After the raw material powders […]<\/p>\n","protected":false},"author":6,"featured_media":9013,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"post_folder":[],"class_list":["post-9008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/posts\/9008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/comments?post=9008"}],"version-history":[{"count":1,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/posts\/9008\/revisions"}],"predecessor-version":[{"id":9014,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/posts\/9008\/revisions\/9014"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/media\/9013"}],"wp:attachment":[{"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/media?parent=9008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/categories?post=9008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/tags?post=9008"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/am-material.com\/de\/wp-json\/wp\/v2\/post_folder?post=9008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}