{"id":6769,"date":"2024-11-23T14:07:32","date_gmt":"2024-11-23T14:07:32","guid":{"rendered":"https:\/\/jinsuncarbon.com\/?p=6769"},"modified":"2024-12-02T21:26:08","modified_gmt":"2024-12-02T21:26:08","slug":"proprietes-mecaniques-du-graphite","status":"publish","type":"post","link":"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/","title":{"rendered":"Guide des propri\u00e9t\u00e9s m\u00e9caniques du graphite : Tout ce qu'il faut savoir"},"content":{"rendered":"<p>Les propri\u00e9t\u00e9s m\u00e9caniques du graphite sont les diverses propri\u00e9t\u00e9s qui apparaissent sous l'action d'une force. Ces propri\u00e9t\u00e9s peuvent \u00eatre clairement d\u00e9riv\u00e9es de la particularit\u00e9 structurelle du graphite : les atomes de carbone de chaque couche ont une liaison covalente solide, mais entre les couches, la liaison est faible.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphites_Mechanical_Properties\" >Propri\u00e9t\u00e9s m\u00e9caniques du graphite<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_Compressive_Strength\" >R\u00e9sistance \u00e0 la compression du graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_Flexural_Strength\" >Graphite R\u00e9sistance \u00e0 la flexion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_Elastic_Modulus\" >Module d'\u00e9lasticit\u00e9 du graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_Thermal_Expansion_Coefficient\" >Coefficient de dilatation thermique du graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_Yield_Strength\" >Limite d'\u00e9lasticit\u00e9 du graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Hardness_of_Graphite\" >Duret\u00e9 du graphite<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Application_Based_on_Mechanical_Properties_of_Graphite\" >Application bas\u00e9e sur les propri\u00e9t\u00e9s m\u00e9caniques du graphite<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#High-Temperature_Applications\" >Applications \u00e0 haute temp\u00e9rature<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Aerospace_and_Defense\" >A\u00e9rospatiale et d\u00e9fense<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Nuclear_Industry\" >Industrie nucl\u00e9aire<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Lubrication_and_Sealing\" >Lubrification et \u00e9tanch\u00e9it\u00e9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Impact_on_graphite_mechanical_properties\" >Impact sur les propri\u00e9t\u00e9s m\u00e9caniques du graphite<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_crystal_structure\" >Structure cristalline du graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_production_method\" >M\u00e9thode de production de graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_grain_size_and_orientation\" >Taille et orientation des grains de graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Graphite_surface_modification_and_functionalization\" >Modification et fonctionnalisation de la surface du graphite<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/jinsuncarbon.com\/fr\/proprietes-mecaniques-du-graphite\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"Graphites_Mechanical_Properties\"><\/span>Propri\u00e9t\u00e9s m\u00e9caniques du graphite<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_Compressive_Strength\"><\/span>R\u00e9sistance \u00e0 la compression du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La r\u00e9sistance \u00e0 la compression du graphite est anisotrope, et la r\u00e9sistance parall\u00e8le au plan est beaucoup plus \u00e9lev\u00e9e que celle dans la direction verticale. Par exemple, la r\u00e9sistance \u00e0 la compression des \u00e9lectrodes de carbone dans la direction parall\u00e8le est de 21,6~49,0 MPa, alors qu'elle n'est que de 11,7~29,4 MPa dans la direction verticale. En outre, la r\u00e9sistance \u00e0 la compression du graphite pyrolytique est consid\u00e9rablement am\u00e9lior\u00e9e \u00e0 haute temp\u00e9rature, jusqu'\u00e0 137,3 MPa.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_Flexural_Strength\"><\/span>Graphite R\u00e9sistance \u00e0 la flexion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La r\u00e9sistance \u00e0 la flexion du graphite varie selon la direction : 4,9~12,7MPa dans le sens parall\u00e8le et 5,8~15,7MPa dans le sens vertical. La r\u00e9sistance \u00e0 la flexion du graphite augmente avec l'augmentation de la temp\u00e9rature, ce qui indique d'excellentes propri\u00e9t\u00e9s m\u00e9caniques \u00e0 haute temp\u00e9rature.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_Elastic_Modulus\"><\/span>Module d'\u00e9lasticit\u00e9 du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le module d'\u00e9lasticit\u00e9 du graphite refl\u00e8te la relation entre la contrainte et la d\u00e9formation, la direction parall\u00e8le \u00e9tant plus importante que la direction verticale, la temp\u00e9rature ambiante est particuli\u00e8rement critique. Avec l'augmentation de la temp\u00e9rature, le changement du module d'\u00e9lasticit\u00e9 est tr\u00e8s important pour pr\u00e9voir les performances m\u00e9caniques.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_Thermal_Expansion_Coefficient\"><\/span>Coefficient de dilatation thermique du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le graphite change avec la temp\u00e9rature, et la diff\u00e9rence de coefficient de dilatation thermique est \u00e9vidente entre les diff\u00e9rentes directions. <a href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-pyrolytique\/\">Pyrolytique <\/a><a href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-pyrolytique\/\">graphite<\/a> a une excellente structure et une bonne stabilit\u00e9 dimensionnelle \u00e0 haute temp\u00e9rature.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_Yield_Strength\"><\/span>Limite d'\u00e9lasticit\u00e9 du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La limite d'\u00e9lasticit\u00e9 refl\u00e8te la capacit\u00e9 du graphite \u00e0 passer d'une d\u00e9formation \u00e9lastique \u00e0 une d\u00e9formation plastique, et sa taille est fortement influenc\u00e9e par la direction et la temp\u00e9rature. La limite d'\u00e9lasticit\u00e9 est consid\u00e9rablement am\u00e9lior\u00e9e \u00e0 haute temp\u00e9rature, ce qui correspond \u00e0 l'environnement \u00e0 haute temp\u00e9rature.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Hardness_of_Graphite\"><\/span>Duret\u00e9 du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La duret\u00e9 du graphite est anisotrope et d\u00e9pend de la m\u00e9thode d'essai ; elle peut \u00eatre d\u00e9termin\u00e9e par la duret\u00e9 d'indentation ou la duret\u00e9 de rebondissement. Le graphite pyrolytique a une duret\u00e9 relativement \u00e9lev\u00e9e et convient particuli\u00e8rement aux applications de haute pr\u00e9cision. La duret\u00e9 d\u00e9pend de la direction et de la mani\u00e8re dont la charge est appliqu\u00e9e.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Application_Based_on_Mechanical_Properties_of_Graphite\"><\/span>Application bas\u00e9e sur les propri\u00e9t\u00e9s m\u00e9caniques du graphite<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"High-Temperature_Applications\"><\/span>Applications \u00e0 haute temp\u00e9rature<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Utilis\u00e9 couramment dans les pi\u00e8ces des fours, <a href=\"https:\/\/jinsuncarbon.com\/fr\/produit-2\/creuset-en-graphite\/\">creusets<\/a>Le mat\u00e9riau peut conserver son int\u00e9grit\u00e9 structurelle et r\u00e9sister \u00e0 la d\u00e9formation \u00e0 des temp\u00e9ratures extr\u00eamement \u00e9lev\u00e9es. En outre, son faible coefficient de dilatation thermique r\u00e9duit efficacement les contraintes thermiques et pr\u00e9sente une excellente durabilit\u00e9 en cas de changements rapides de temp\u00e9rature.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Aerospace_and_Defense\"><\/span>A\u00e9rospatiale et d\u00e9fense<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>En raison de sa l\u00e9g\u00e8ret\u00e9, de son rapport r\u00e9sistance\/poids \u00e9lev\u00e9 et de ses propri\u00e9t\u00e9s tr\u00e8s r\u00e9sistantes \u00e0 la temp\u00e9rature, il trouve de nombreuses applications dans la fabrication de fus\u00e9es, d'avions et d'h\u00e9licopt\u00e8res. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rocket_engine_nozzle\" target=\"_blank\" rel=\"noopener\">buses<\/a>Le graphite est utilis\u00e9 dans les syst\u00e8mes de chauffage, les syst\u00e8mes de protection thermique et les composants structurels. Gr\u00e2ce \u00e0 ses propri\u00e9t\u00e9s m\u00e9caniques \u00e0 haute temp\u00e9rature, le graphite peut atteindre une tr\u00e8s bonne stabilit\u00e9 dans des environnements extr\u00eames. En outre, son anisotropie peut \u00eatre optimis\u00e9e par la conception pour r\u00e9pondre aux diverses exigences de performance des composants.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nuclear_Industry\"><\/span>Industrie nucl\u00e9aire<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Les bonnes propri\u00e9t\u00e9s m\u00e9caniques et la stabilit\u00e9 chimique du graphite lui permettent d'agir \u00e0 la fois comme mod\u00e9rateur et comme mat\u00e9riau structurel dans les <a href=\"https:\/\/en.wikipedia.org\/wiki\/Nuclear_reactor\" target=\"_blank\" rel=\"noopener\">nucl\u00e9aire<\/a> r\u00e9acteurs. Le graphite a une faible section d'absorption des neutrons et une grande r\u00e9sistance \u00e0 la compression, ce qui permet \u00e0 ce mat\u00e9riau de fonctionner r\u00e9guli\u00e8rement pendant de tr\u00e8s longues p\u00e9riodes dans des conditions de rayonnement \u00e9lev\u00e9 et de haute temp\u00e9rature.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lubrication_and_Sealing\"><\/span>Lubrification et \u00e9tanch\u00e9it\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le graphite a une faible duret\u00e9, de bonnes propri\u00e9t\u00e9s autolubrifiantes et une grande r\u00e9sistance \u00e0 la compression. Il peut \u00eatre largement utilis\u00e9 dans <a href=\"https:\/\/jinsuncarbon.com\/fr\/produit-2\/anneau-en-graphite\/\">roulements<\/a>Il s'agit d'un mat\u00e9riau de base pour la fabrication de joints et de garnitures d'\u00e9quipements industriels. Son faible coefficient de frottement et son excellente r\u00e9sistance \u00e0 l'usure sont particuli\u00e8rement adapt\u00e9s aux besoins d'\u00e9tanch\u00e9it\u00e9 dans les environnements \u00e0 haute pression, haute temp\u00e9rature et corrosion chimique.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Impact_on_graphite_mechanical_properties\"><\/span>Impact sur les propri\u00e9t\u00e9s m\u00e9caniques du graphite<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_crystal_structure\"><\/span>Structure cristalline du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Les limites de grain des d\u00e9fauts Stone-Wales ont un impact consid\u00e9rable sur la r\u00e9sistance \u00e0 la traction et le comportement \u00e0 la rupture. Les zones o\u00f9 les d\u00e9fauts ont une structure \u00e0 haute densit\u00e9 pourraient \u00e9galement avoir une r\u00e9sistance m\u00e9canique plus faible, car les contraintes locales peuvent \u00eatre concentr\u00e9es.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_production_method\"><\/span>M\u00e9thode de production de graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le graphite polycristallin synth\u00e9tis\u00e9 par d\u00e9p\u00f4t chimique en phase vapeur comporte g\u00e9n\u00e9ralement des joints de grains, ce qui r\u00e9duit la r\u00e9sistance \u00e0 la traction. Toutefois, les graphites monocristallins ont de meilleures propri\u00e9t\u00e9s m\u00e9caniques, simplement parce qu'ils pr\u00e9sentent moins de d\u00e9fauts.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_grain_size_and_orientation\"><\/span>Taille et orientation des grains de graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>En effet, les grains plus gros peuvent offrir une voie plus continue pour la distribution de la contrainte, ce qui augmente la r\u00e9sistance. Cependant, des grains plus petits conduiraient \u00e0 une fragilit\u00e9 accrue et \u00e0 une r\u00e9duction suppl\u00e9mentaire de la r\u00e9sistance globale en raison de l'augmentation des joints de grains.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Graphite_surface_modification_and_functionalization\"><\/span>Modification et fonctionnalisation de la surface du graphite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La modification et la fonctionnalisation des surfaces permettent d'am\u00e9liorer les interactions \u00e0 la surface et une distribution plus homog\u00e8ne des contraintes, r\u00e9duisant ainsi les d\u00e9faillances dues \u00e0 des d\u00e9fauts. Par exemple, les surfaces fonctionnalis\u00e9es peuvent \u00eatre plus robustes et r\u00e9sister \u00e0 la formation de fissures.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>En tant que mat\u00e9riau non m\u00e9tallique, la structure et la morphologie du graphite d\u00e9terminent g\u00e9n\u00e9ralement ses propri\u00e9t\u00e9s m\u00e9caniques. Les excellentes propri\u00e9t\u00e9s m\u00e9caniques du graphite sont \u00e9galement largement utilis\u00e9es dans de nombreux domaines industriels. \u00c0 l'avenir, les applications des propri\u00e9t\u00e9s m\u00e9caniques du graphite seront encore plus \u00e9tendues et approfondies gr\u00e2ce aux progr\u00e8s et aux am\u00e9liorations constants de la science et de la technologie. Cela donnera une nouvelle orientation au d\u00e9veloppement de l'industrie, de la science et de la technologie.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Les propri\u00e9t\u00e9s m\u00e9caniques du graphite sont les diverses propri\u00e9t\u00e9s qui apparaissent sous l'action d'une force. Ces propri\u00e9t\u00e9s peuvent \u00eatre clairement d\u00e9riv\u00e9es de la particularit\u00e9 structurelle du graphite : les atomes de carbone de chaque couche ont une liaison covalente solide, mais entre les couches, la liaison est faible. Propri\u00e9t\u00e9s m\u00e9caniques du graphite R\u00e9sistance \u00e0 la compression du graphite La r\u00e9sistance \u00e0 la compression du graphite est anisotrope, [...]<\/p>","protected":false},"author":3,"featured_media":6776,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6769","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-carbon-graphite"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v19.2.1 (Yoast SEO v25.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Graphite Mechanical Properties Guide<\/title>\n<meta name=\"description\" content=\"Graphite mechanical properties are characterized by flexural strength, compressive strength, and tensile strength.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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