{"id":114358,"date":"2022-02-04T12:29:56","date_gmt":"2022-02-04T11:29:56","guid":{"rendered":"https:\/\/material-properties.org\/kevlar-tableau-des-materiaux-applications-prix\/"},"modified":"2022-02-04T12:29:56","modified_gmt":"2022-02-04T11:29:56","slug":"kevlar-tableau-des-materiaux-applications-prix","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/kevlar-tableau-des-materiaux-applications-prix\/","title":{"rendered":"Kevlar &#8211; Tableau des mat\u00e9riaux &#8211; Applications &#8211; Prix"},"content":{"rendered":"<h2><span>\u00c0 propos du Kevlar<\/span><\/h2>\n<p><span>Le Kevlar a de nombreuses applications, allant des pneus de v\u00e9lo et des voiles de course aux gilets pare-balles, en raison de son rapport r\u00e9sistance \u00e0 la traction\/poids \u00e9lev\u00e9 ;\u00a0par cette mesure, il est cinq fois plus r\u00e9sistant que l&rsquo;acier.\u00a0Les fibres \u00e0 haute t\u00e9nacit\u00e9 et thermiquement stables sont utilis\u00e9es pour les gilets pare-balles l\u00e9gers, et \u00e9galement en raison de l&rsquo;\u00e9conomie de poids, elles peuvent \u00e9galement remplacer des mat\u00e9riaux plus lourds dans les avions, pour \u00e9conomiser du carburant.\u00a0<div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/kevlar-properties-density-strength-price.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108424\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/kevlar-properties-density-strength-price.png\" alt=\"kevlar propri\u00e9t\u00e9s densit\u00e9 r\u00e9sistance prix\" width=\"500\" height=\"500\" srcset=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/kevlar-properties-density-strength-price.png 1000w, https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/kevlar-properties-density-strength-price-300x300.png 300w, https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/kevlar-properties-density-strength-price-150x150.png 150w, https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/kevlar-properties-density-strength-price-768x768.png 768w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><\/p>\n<h3 style=\"text-align: center;\"><span>R\u00e9sum\u00e9<\/span><\/h3>\n<table class=\"a\">\n<tbody>\n<tr class=\"b\">\n<td style=\"text-align: center;\"><span>Nom<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>Kevlar<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Phase \u00e0 STP<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>solide<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Densit\u00e9<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>1440kg\/m3<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>R\u00e9sistance \u00e0 la traction ultime<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>3600 MPa<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Limite d&rsquo;\u00e9lasticit\u00e9<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>N \/ A<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Module d&rsquo;\u00e9lasticit\u00e9 de Young<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>130 GPa<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Duret\u00e9 Brinell<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>N \/ A<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Point de fusion<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>477\u00a0\u00b0C<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Conductivit\u00e9 thermique<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>0,04 W\/mK<\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Capacit\u00e9 thermique<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span style=\"text-align: start;\"><span>1420 J\/g\u00b7K<\/span><\/span><\/strong><\/td>\n<\/tr>\n<tr class=\"c\">\n<td style=\"text-align: center;\"><span>Prix<\/span><\/td>\n<td style=\"text-align: center;\"><strong><span>50\u00a0$\/kg<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><\/p>\n<h2><span>Composition du Kevlar<\/span><\/h2>\n<p><span>G\u00e9n\u00e9ralement, il est fil\u00e9 en cordes ou en feuilles de tissu qui peuvent \u00eatre utilis\u00e9es telles quelles ou comme ingr\u00e9dient dans des composants en mat\u00e9riaux composites.\u00a0Lorsque le Kevlar est fil\u00e9, la fibre r\u00e9sultante a une r\u00e9sistance \u00e0 la traction d&rsquo;environ 3 620 MPa et une densit\u00e9 relative de 1,44.\u00a0Le polym\u00e8re doit sa haute r\u00e9sistance aux nombreuses liaisons inter-cha\u00eenes.\u00a0Ces liaisons hydrog\u00e8ne intermol\u00e9culaires se forment entre les groupes carbonyle et les centres NH.\u00a0<div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p style=\"text-align: center;\"><span style=\"font-size: 50px;\"><span>75%<\/span><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Carbon-periodic-table.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-thumbnail wp-image-92294\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Carbon-periodic-table-150x150.png\" alt=\"Carbone dans le tableau p\u00e9riodique\" width=\"150\" height=\"150\" \/><\/a><\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p style=\"text-align: center;\"><span style=\"font-size: 50px;\"><span>dix%<\/span><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Hydrogen-periodic-table.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-thumbnail wp-image-95010\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Hydrogen-periodic-table-150x150.png\" alt=\"Hydrog\u00e8ne dans le tableau p\u00e9riodique\" width=\"150\" height=\"150\" srcset=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Hydrogen-periodic-table-150x150.png 150w, https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Hydrogen-periodic-table-300x300.png 300w, https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Hydrogen-periodic-table.png 500w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a><\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p style=\"text-align: center;\"><span style=\"font-size: 50px;\"><span>15%<\/span><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Nitrogen-periodic-table.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-thumbnail wp-image-94995\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Nitrogen-periodic-table-150x150.png\" alt=\"Azote dans le tableau p\u00e9riodique\" width=\"150\" height=\"150\" srcset=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Nitrogen-periodic-table-150x150.png 150w, https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Nitrogen-periodic-table-300x300.png 300w, https:\/\/material-properties.org\/wp-content\/uploads\/2020\/09\/Nitrogen-periodic-table.png 500w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a><\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"> <\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><\/p>\n<h2><span>Applications du Kevlar<\/span><\/h2>\n<figure id=\"attachment_108955\" aria-describedby=\"caption-attachment-108955\" style=\"width: 261px\" class=\"wp-caption alignright\"><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/Kevlar-Material-Table-Applications-Price.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-108954\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/Kevlar-Material-Table-Applications-Price-271x300.jpg\" alt=\"Kevlar - Tableau des mat\u00e9riaux - Applications - Prix\" width=\"271\" height=\"300\" srcset=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/Kevlar-Material-Table-Applications-Price-271x300.jpg 271w, https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/Kevlar-Material-Table-Applications-Price-768x852.jpg 768w, https:\/\/material-properties.org\/wp-content\/uploads\/2021\/03\/Kevlar-Material-Table-Applications-Price.jpg 800w\" sizes=\"(max-width: 271px) 100vw, 271px\" \/><\/a><figcaption id=\"caption-attachment-108955\" class=\"wp-caption-text\"><span>{%L\u00c9GENDE%}<\/span><\/figcaption><\/figure>\n<p><span>Le Kevlar a de nombreuses applications, allant des pneus de v\u00e9lo et des voiles de course aux gilets pare-balles, en raison de son rapport r\u00e9sistance \u00e0 la traction\/poids \u00e9lev\u00e9 ;\u00a0par cette mesure, il est cinq fois plus r\u00e9sistant que l&rsquo;acier.\u00a0Les fibres \u00e0 haute t\u00e9nacit\u00e9 et thermiquement stables sont utilis\u00e9es pour les gilets pare-balles l\u00e9gers, et \u00e9galement en raison de l&rsquo;\u00e9conomie de poids, elles peuvent \u00e9galement remplacer des mat\u00e9riaux plus lourds dans les avions, pour \u00e9conomiser du carburant.\u00a0<div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><\/p>\n<h2><span>Propri\u00e9t\u00e9s m\u00e9caniques du Kevlar<\/span><\/h2>\n<h3><span>Force du Kevlar<\/span><\/h3>\n<p><span>En m\u00e9canique des mat\u00e9riaux, la\u00a0<\/span><strong><span>r\u00e9sistance d&rsquo;un mat\u00e9riau<\/span><\/strong><span>\u00a0est sa capacit\u00e9 \u00e0 supporter une charge appliqu\u00e9e sans rupture ni d\u00e9formation plastique.\u00a0<\/span><strong><span>La r\u00e9sistance des mat\u00e9riaux<\/span><\/strong><span>\u00a0consid\u00e8re essentiellement la relation entre les\u00a0<\/span><strong><span>charges externes<\/span><\/strong><span>\u00a0appliqu\u00e9es \u00e0 un mat\u00e9riau et la\u00a0<\/span><strong><span>d\u00e9formation<\/span><\/strong><span>\u00a0ou la modification des dimensions du mat\u00e9riau qui en r\u00e9sulte.\u00a0Lors de la conception de structures et de machines, il est important de tenir compte de ces facteurs, afin que le mat\u00e9riau s\u00e9lectionn\u00e9 ait une r\u00e9sistance suffisante pour r\u00e9sister aux charges ou forces appliqu\u00e9es et conserver sa forme d&rsquo;origine.<\/span><\/p>\n<p><strong><span>La r\u00e9sistance d&rsquo;un mat\u00e9riau<\/span><\/strong><span>\u00a0est sa capacit\u00e9 \u00e0 supporter cette charge appliqu\u00e9e sans d\u00e9faillance ni d\u00e9formation plastique.\u00a0Pour la contrainte de traction, la capacit\u00e9 d&rsquo;un mat\u00e9riau ou d&rsquo;une structure \u00e0 supporter des charges tendant \u00e0 s&rsquo;allonger est appel\u00e9e r\u00e9sistance ultime \u00e0 la traction (UTS).\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-yield-strength-yield-point-definition\/\"><span>La<\/span><\/a><span>\u00a0limite d&rsquo;\u00e9lasticit\u00e9 ou la limite d&rsquo;\u00e9lasticit\u00e9 est la propri\u00e9t\u00e9 du mat\u00e9riau d\u00e9finie comme la contrainte \u00e0 laquelle un mat\u00e9riau commence \u00e0 se d\u00e9former plastiquement, tandis que la limite d&rsquo;\u00e9lasticit\u00e9 est le point o\u00f9 la d\u00e9formation non lin\u00e9aire (\u00e9lastique + plastique) commence.\u00a0En cas de contrainte de traction d&rsquo;une barre uniforme (courbe contrainte-d\u00e9formation), la\u00a0\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-hookes-law-definition\/\"><b><span>loi de Hooke<\/span><\/b><\/a><span>\u00a0d\u00e9crit le comportement d&rsquo;une barre dans la r\u00e9gion \u00e9lastique.\u00a0Le\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-youngs-modulus-of-elasticity-definition\/\"><span>module d&rsquo;\u00e9lasticit\u00e9 de Young<\/span><\/a><span>est le module d&rsquo;\u00e9lasticit\u00e9 pour les contraintes de traction et de compression dans le r\u00e9gime d&rsquo;\u00e9lasticit\u00e9 lin\u00e9aire d&rsquo;une d\u00e9formation uniaxiale et est g\u00e9n\u00e9ralement \u00e9valu\u00e9 par des essais de traction.<\/span><\/p>\n<p><span>Voir aussi :\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-strength-definition\/\"><span>R\u00e9sistance des mat\u00e9riaux<\/span><\/a><\/p>\n<h3><span>R\u00e9sistance \u00e0 la traction ultime du Kevlar<\/span><\/h3>\n<p><span>La r\u00e9sistance \u00e0 la traction ultime du Kevlar est de 3600 MPa.<\/span><\/p>\n<h3><span>Limite d&rsquo;\u00e9lasticit\u00e9 du Kevlar<\/span><\/h3>\n<p><span>La limite d&rsquo;\u00e9lasticit\u00e9 du Kevlar\u00a0<\/span><strong>\u00a0<\/strong><span>est N\/A.<\/span><\/p>\n<h3><span>Module d&rsquo;\u00e9lasticit\u00e9 du Kevlar<\/span><\/h3>\n<p><span>Le module d&rsquo;\u00e9lasticit\u00e9 de Young du Kevlar est de 130 GPa.<\/span><\/p>\n<h3><span>Duret\u00e9 du Kevlar<\/span><\/h3>\n<p><span>En science des mat\u00e9riaux, la\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/hardness\/\"><strong><span>duret\u00e9<\/span><\/strong><\/a><span>\u00a0\u00a0est la capacit\u00e9 \u00e0 r\u00e9sister \u00e0\u00a0\u00a0<\/span><strong><span>l&rsquo;indentation de surface<\/span><\/strong><span>\u00a0\u00a0(\u00a0<\/span><strong><span>d\u00e9formation plastique localis\u00e9e<\/span><\/strong><span>\u00a0) et\u00a0 aux\u00a0<\/span><strong><span>rayures<\/span><\/strong><span>\u00a0.\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/hardness\/brinell-hardness-test\/\"><strong><span>Le test de duret\u00e9 Brinell<\/span><\/strong><\/a><span>\u00a0\u00a0est l&rsquo;un des tests de duret\u00e9 par indentation, qui a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour les tests de duret\u00e9.\u00a0Dans les tests Brinell, un\u00a0\u00a0<\/span><strong><span>p\u00e9n\u00e9trateur sph\u00e9rique<\/span><\/strong><span>\u00a0dur est forc\u00e9 sous une charge sp\u00e9cifique dans la surface du m\u00e9tal \u00e0 tester.<\/span><\/p>\n<p><span>L&rsquo;\u00a0 indice de\u00a0<\/span><strong><span>duret\u00e9 Brinell<\/span><\/strong><span>\u00a0\u00a0(HB) est la charge divis\u00e9e par la surface de l&rsquo;indentation.\u00a0Le diam\u00e8tre de l&#8217;empreinte est mesur\u00e9 avec un microscope \u00e0 \u00e9chelle superpos\u00e9e.\u00a0Le nombre de duret\u00e9 Brinell est calcul\u00e9 \u00e0 partir de l&rsquo;\u00e9quation\u00a0:<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/brinell-hardness-number-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-90675\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/brinell-hardness-number-definition.png\" sizes=\"(max-width: 320px) 100vw, 320px\" srcset=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/brinell-hardness-number-definition.png 320w, https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/brinell-hardness-number-definition-300x178.png 300w\" alt=\"indice de duret\u00e9 Brinell - d\u00e9finition\" width=\"320\" height=\"190\" \/><\/a><\/p>\n<p><span>La duret\u00e9 Brinell du Kevlar est d&rsquo;environ N\/A.<\/span><\/p>\n<p><span>Voir aussi :\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-hardness-definition\/\"><span>Duret\u00e9 des mat\u00e9riaux<\/span><\/a><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h3 style=\"text-align: center;\"><span>La r\u00e9sistance des mat\u00e9riaux<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/strength-of-materials-tensile-yield\/\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108070 size-medium\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/02\/Material-Table-Strength-of-Materials-300x182.png\" alt=\"Tableau des mat\u00e9riaux - R\u00e9sistance des mat\u00e9riaux\" width=\"300\" height=\"182\" \/><\/a><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h3 style=\"text-align: center;\"><span>\u00c9lasticit\u00e9 des mat\u00e9riaux<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/elasticity-of-materials\/\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108080 size-medium\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/02\/Material-Table-Elasticity-of-Materials-300x185.png\" alt=\"Tableau des mat\u00e9riaux - \u00c9lasticit\u00e9 des mat\u00e9riaux\" width=\"300\" height=\"185\" \/><\/a><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h3 style=\"text-align: center;\"><span>Duret\u00e9 des mat\u00e9riaux<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/hardness-of-materials-brinell-mohs\/\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108085 size-medium\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/02\/Material-Table-Hardness-of-Materials-300x182.png\" alt=\"Tableau des mat\u00e9riaux - Duret\u00e9 des mat\u00e9riaux\" width=\"300\" height=\"182\" \/><\/a><span>\u00a0 <\/span><\/p><\/div><\/div> <div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><\/p>\n<h2><span>Propri\u00e9t\u00e9s thermiques du Kevlar<\/span><\/h2>\n<h3><span>Kevlar &#8211; Point de fusion<\/span><\/h3>\n<p><strong><span>Le point de fusion du Kevlar est de 477\u00a0<\/span><\/strong><strong><span>\u00b0C<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><span>Notez que ces points sont associ\u00e9s \u00e0 la pression atmosph\u00e9rique standard.\u00a0En g\u00e9n\u00e9ral, la\u00a0\u00a0<\/span><strong><span>fusion<\/span><\/strong><span>\u00a0\u00a0est un\u00a0\u00a0<\/span><strong><span>changement de phase<\/span><\/strong><span>\u00a0\u00a0d&rsquo;une substance de la phase solide \u00e0 la phase liquide.\u00a0Le\u00a0\u00a0<\/span><strong><span>point de fusion<\/span><\/strong><span>\u00a0\u00a0d&rsquo;une substance est la temp\u00e9rature \u00e0 laquelle ce changement de phase se produit.\u00a0Le\u00a0\u00a0<\/span><strong><span>point de fusion\u00a0<\/span><\/strong><span>\u00a0d\u00e9finit \u00e9galement une condition dans laquelle le solide et le liquide peuvent exister en \u00e9quilibre.\u00a0Pour divers compos\u00e9s chimiques et alliages, il est difficile de d\u00e9finir le point de fusion, car il s&rsquo;agit g\u00e9n\u00e9ralement d&rsquo;un m\u00e9lange de divers \u00e9l\u00e9ments chimiques.<\/span><\/p>\n<h3><span>Kevlar &#8211; Conductivit\u00e9 thermique<\/span><\/h3>\n<p><span>La conductivit\u00e9 thermique du Kevlar est de\u00a0<\/span><strong><span>0,04\u00a0<\/span><\/strong><strong><span>W\/(m\u00b7K)<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><span>Les caract\u00e9ristiques de transfert de chaleur d&rsquo;un mat\u00e9riau solide sont mesur\u00e9es par une propri\u00e9t\u00e9 appel\u00e9e la\u00a0\u00a0<\/span><strong><span>conductivit\u00e9 thermique<\/span><\/strong><span>\u00a0, k (ou \u03bb), mesur\u00e9e en\u00a0\u00a0<\/span><strong><span>W\/mK<\/span><\/strong><span>\u00a0.\u00a0C&rsquo;est une mesure de la capacit\u00e9 d&rsquo;une substance \u00e0 transf\u00e9rer de la chaleur \u00e0 travers un mat\u00e9riau par\u00a0\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conduction-heat-conduction-definition\/\"><span>conduction<\/span><\/a><span>\u00a0.\u00a0Notez que\u00a0\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-fouriers-law-of-thermal-conduction-definition\/\"><strong><span>la loi de Fourier<\/span><\/strong><\/a><span>\u00a0\u00a0s&rsquo;applique \u00e0 toute mati\u00e8re, quel que soit son \u00e9tat (solide, liquide ou gazeux), par cons\u00e9quent, elle est \u00e9galement d\u00e9finie pour les liquides et les gaz.<\/span><\/p>\n<p><span>La\u00a0\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conductivity-definition\/\"><strong><span>conductivit\u00e9 thermique<\/span><\/strong><\/a><span>\u00a0\u00a0de la plupart des liquides et des solides varie avec la temp\u00e9rature.\u00a0Pour les vapeurs, cela d\u00e9pend aussi de la pression.\u00a0En g\u00e9n\u00e9ral:<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/thermal-conductivity-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-88791\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/thermal-conductivity-definition.png\" alt=\"conductivit\u00e9 thermique - d\u00e9finition\" width=\"225\" height=\"75\" \/><\/a><\/p>\n<p><span>La plupart des mat\u00e9riaux sont presque homog\u00e8nes, nous pouvons donc g\u00e9n\u00e9ralement \u00e9crire\u00a0\u00a0<\/span><strong><em><span>k = k (T)<\/span><\/em><\/strong><span>\u00a0.\u00a0Des d\u00e9finitions similaires sont associ\u00e9es aux conductivit\u00e9s thermiques dans les directions y et z (ky, kz), mais pour un mat\u00e9riau isotrope, la conductivit\u00e9 thermique est ind\u00e9pendante de la direction de transfert, kx = ky = kz = k.<\/span><\/p>\n<h3><span>Kevlar &#8211; Chaleur sp\u00e9cifique<\/span><\/h3>\n<p><strong><span>La chaleur sp\u00e9cifique du Kevlar est de\u00a0<\/span><\/strong><strong><span>1420\u00a0<\/span><\/strong><strong><span>J\/g K<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><strong><span>La chaleur sp\u00e9cifique, ou capacit\u00e9 thermique sp\u00e9cifique,\u00a0<\/span><\/strong><span>\u00a0est une propri\u00e9t\u00e9 li\u00e9e \u00e0\u00a0<strong><a href=\"https:\/\/www.thermal-engineering.org\/what-is-internal-energy-thermal-energy-definition\/\">l&rsquo;\u00e9nergie interne<\/a><\/strong>\u00a0\u00a0tr\u00e8s importante en thermodynamique.\u00a0Les\u00a0\u00a0<strong>propri\u00e9t\u00e9s intensives\u00a0\u00a0<\/strong><strong><em>c\u00a0<\/em><\/strong><strong><em><sub>v<\/sub><\/em><\/strong>\u00a0\u00a0et\u00a0\u00a0<strong><em>c\u00a0<\/em><\/strong><strong><em><sub>p<\/sub><\/em><\/strong>\u00a0\u00a0sont d\u00e9finies pour des substances compressibles pures et simples comme des d\u00e9riv\u00e9es partielles de l&rsquo;\u00a0\u00a0<strong>\u00e9nergie interne\u00a0\u00a0<\/strong><strong><em>u(T, v)<\/em><\/strong>\u00a0\u00a0et de\u00a0 l&rsquo;\u00a0<strong>enthalpie\u00a0\u00a0<\/strong><strong><em>h(T, p)<\/em><\/strong>\u00a0, respectivement :<\/span><strong>\u00a0<\/strong><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/Specific-Heat-at-Constant-Volume-and-Constant-Pressure.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-87687\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/Specific-Heat-at-Constant-Volume-and-Constant-Pressure.png\" alt=\"\" width=\"106\" height=\"138\" \/><\/a><\/p>\n<p><span>o\u00f9 les indices\u00a0\u00a0<\/span><strong><span>v<\/span><\/strong><span>\u00a0\u00a0et\u00a0\u00a0<\/span><strong><span>p<\/span><\/strong><span>\u00a0\u00a0d\u00e9signent les variables maintenues fixes lors de la diff\u00e9renciation.\u00a0Les propri\u00e9t\u00e9s\u00a0\u00a0<\/span><strong><span>c\u00a0<\/span><sub><span>v<\/span><\/sub>\u00a0<\/strong><span>\u00a0et\u00a0\u00a0<\/span><strong><span>c\u00a0<\/span><sub><span>p<\/span><\/sub><\/strong><span>\u00a0\u00a0sont appel\u00e9es\u00a0\u00a0<\/span><strong><span>chaleurs sp\u00e9cifiques\u00a0<\/span><\/strong><span>\u00a0(ou\u00a0\u00a0<\/span><strong><span>capacit\u00e9s calorifiques<\/span><\/strong><span>\u00a0) car, dans certaines conditions particuli\u00e8res, elles relient le changement de temp\u00e9rature d&rsquo;un syst\u00e8me \u00e0 la quantit\u00e9 d&rsquo;\u00e9nergie ajout\u00e9e par transfert de chaleur.\u00a0Leurs unit\u00e9s SI sont\u00a0\u00a0<\/span><strong><span>J\/kg K<\/span><\/strong><span>\u00a0\u00a0ou\u00a0\u00a0<\/span><strong><span>J\/mol K<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h3 style=\"text-align: center;\"><span>Point de fusion des mat\u00e9riaux<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/melting-point-of-materials\/\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108050 size-medium\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/02\/Material-Table-Metling-Point-300x183.png\" alt=\"Tableau des mat\u00e9riaux - Point de fusion\" width=\"300\" height=\"183\" \/><\/a><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h3 style=\"text-align: center;\"><span>Conductivit\u00e9 thermique des mat\u00e9riaux<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/thermal-conductivity-of-materials\/\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108055 size-medium\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/02\/Material-Table-Thermal-Conductivity-300x180.png\" alt=\"Tableau des mat\u00e9riaux - Conductivit\u00e9 thermique\" width=\"300\" height=\"180\" \/><\/a><span><\/span><\/p><\/div><\/div> <div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h3 style=\"text-align: center;\"><span>Capacit\u00e9 calorifique des mat\u00e9riaux<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/heat-capacity-of-materials\/\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-108063 size-medium\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2021\/02\/Material-Table-Heat-Capacity-300x179.png\" alt=\"Tableau des mat\u00e9riaux - Capacit\u00e9 calorifique\" width=\"300\" height=\"179\" \/><\/a><\/p>\n<h3 style=\"text-align: center;\"><\/h3>\n<p><span><\/span><\/p><\/div><\/div> <div class=\"su-divider su-divider-style-dotted\" style=\"margin:25px 0;border-width:3px;border-color:#999999\"><\/div><\/span><\/p>\n<h2><span>Propri\u00e9t\u00e9s et prix des autres mat\u00e9riaux<\/span><\/h2>\n<p><span>table-de-mat\u00e9riaux-en-r\u00e9solution-8k<\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:20px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c0 propos du Kevlar Le Kevlar a de nombreuses applications, allant des pneus de v\u00e9lo et des voiles de course aux gilets pare-balles, en raison de son rapport r\u00e9sistance \u00e0 la traction\/poids \u00e9lev\u00e9 ;\u00a0par cette mesure, il est cinq fois plus r\u00e9sistant que l&rsquo;acier.\u00a0Les fibres \u00e0 haute t\u00e9nacit\u00e9 et thermiquement stables sont utilis\u00e9es pour les &#8230; <a title=\"Kevlar &#8211; Tableau des mat\u00e9riaux &#8211; Applications &#8211; Prix\" class=\"read-more\" href=\"https:\/\/material-properties.org\/fr\/kevlar-tableau-des-materiaux-applications-prix\/\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kevlar | Propri\u00e9t\u00e9s, Prix &amp; 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