{"id":4365,"date":"2008-05-15T12:10:08","date_gmt":"2008-05-15T16:10:08","guid":{"rendered":"https:\/\/spraysensors-cn.tecnar.com\/?p=4365"},"modified":"2024-04-15T12:14:31","modified_gmt":"2024-04-15T16:14:31","slug":"pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating","status":"publish","type":"post","link":"https:\/\/spraysensors-cn.tecnar.com\/en\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/","title":{"rendered":"Pre-Oxidation And TGO Growth Behaviour Of An Air-Plasma-Sprayed Thermal Barrier Coating"},"content":{"rendered":"<p>In thermal barrier coating (TBC) systems, spinel and nickel oxide formed in an oxidizing environment are believed to be detrimental to TBC durability during service at high temperatures. The present study shows that in an air-plasma-sprayed (APS) TBC with Co\u201332Ni\u201321Cr\u20138Al\u20130.5Y (wt.%) bond coat, pre-oxidation treatments in low-pressure oxygen environments can suppress the formation of the detrimental oxides by promoting the formation of an Al2O3 layer at the ceramic topcoat\/bond coat interface. The development of the thermally grown oxide (TGO) layer generally exhibits a three-stage growth phenomenon that resembles high temperature creep. The pre-oxidation treatments reduce the growth rate and extend the steady-state growth stage, leading to an improved durability. Crack propagation in the TBC proceeds via opening and growth of pre-existing discontinuities in the ceramic topcoat, assisted by crack nucleation and growth associated with the TGO. Crack propagation during thermal cycling appeared to be controlled by TGO growth, and the maximum crack length and TGO thickness generally have a power law relationship.<\/p>\n<p><a class=\"btn-tec black\" href=\"https:\/\/spraysensors-cn.tecnar.com\/wp-content\/uploads\/2024\/04\/SCT_202_2008_3787-3796.pdf\" target=\"_blank\" rel=\"noopener\">Link to publication<\/a><\/p>\n<p>Key words: TBC; CoNiCrAlY; Pre-oxidation; Thermal cycling; TGO growth; Crack propagation<\/p>\n<p><em><small>Originally published at Surface and Coatings Technology (Volume 202, Issue 16, 15 May 2008, Pages 3787-3796)<br \/>\nBy W.R. Chen, X. Wu, B.R. Marple, R.S. Lima, P.C. Patnaik<\/small><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In thermal barrier coating (TBC) systems, spinel and nickel oxide formed in an oxidizing environment are believed to be detrimental [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/spraysensors-cn.tecnar.com\/en\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":20,"featured_media":4367,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[42],"tags":[],"class_list":["post-4365","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dpv-evolution-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pre-Oxidation And TGO Growth Behaviour Of An Air-Plasma-Sprayed Thermal Barrier Coating - Tecnar Thermal Spray<\/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:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pre-Oxidation And TGO Growth Behaviour Of An Air-Plasma-Sprayed Thermal Barrier Coating - Tecnar Thermal Spray\" \/>\n<meta property=\"og:description\" content=\"In thermal barrier coating (TBC) systems, spinel and nickel oxide formed in an oxidizing environment are believed to be detrimental [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\" \/>\n<meta property=\"og:site_name\" content=\"Tecnar Thermal Spray\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/tecnarautomation\" \/>\n<meta property=\"article:published_time\" content=\"2008-05-15T16:10:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-15T16:14:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/spraysensors-cn.tecnar.com\/wp-content\/uploads\/2008\/05\/Web-image-18.png\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Flavia FU\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Flavia FU\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\"},\"author\":{\"name\":\"Flavia FU\",\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/#\/schema\/person\/3162fa7791842106828b1897ffb40076\"},\"headline\":\"Pre-Oxidation And TGO Growth Behaviour Of An Air-Plasma-Sprayed Thermal Barrier Coating\",\"datePublished\":\"2008-05-15T16:10:08+00:00\",\"dateModified\":\"2024-04-15T16:14:31+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\"},\"wordCount\":220,\"publisher\":{\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/spraysensors-cn.tecnar.com\/wp-content\/uploads\/2008\/05\/Web-image-18.png\",\"articleSection\":[\"DPV\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\",\"url\":\"https:\/\/spraysensors-cn.tecnar.com\/pre-oxidation-and-tgo-growth-behaviour-of-an-air-plasma-sprayed-thermal-barrier-coating\/\",\"name\":\"Pre-Oxidation And TGO Growth Behaviour Of An Air-Plasma-Sprayed Thermal Barrier Coating - 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