{"id":116948,"date":"2022-05-25T15:32:42","date_gmt":"2022-05-25T14:32:42","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-hexagonal-close-packed-structure-hcp-definition\/"},"modified":"2022-05-31T06:26:38","modified_gmt":"2022-05-31T05:26:38","slug":"quest-ce-que-hexagonal-close-packed-structure-hcp-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-hexagonal-close-packed-structure-hcp-definition\/","title":{"rendered":"Qu’est-ce que Hexagonal Close-packed – Structure hcp – D\u00e9finition"},"content":{"rendered":"

Dans un arrangement hexagonal d’atomes compacts (hcp), la cellule unitaire est constitu\u00e9e de trois couches d’atomes.\u00a0Les couches sup\u00e9rieure et inf\u00e9rieure contiennent six atomes aux coins d’un hexagone et un atome au centre de chaque hexagone.<\/div><\/div><\/span><\/p>\n

<\/div><\/span><\/p>\n

\n
\"Hexagonal<\/a>
Source\u00a0: D\u00e9partement am\u00e9ricain de l’\u00e9nergie, Science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/figcaption><\/figure>\n

Certaines des propri\u00e9t\u00e9s des solides cristallins d\u00e9pendent de la\u00a0<\/span>structure cristalline<\/span><\/strong><\/a>\u00a0du mat\u00e9riau, de la mani\u00e8re dont les atomes, les ions ou les mol\u00e9cules sont dispos\u00e9s dans l’espace.\u00a0Un\u00a0<\/span>r\u00e9seau cristallin<\/span><\/strong>\u00a0est un motif r\u00e9p\u00e9titif de points math\u00e9matiques qui s’\u00e9tend dans tout l’espace.\u00a0Les forces de\u00a0<\/span>la liaison chimique<\/span><\/a>\u00a0provoquent cette r\u00e9p\u00e9tition.\u00a0C’est ce motif r\u00e9p\u00e9t\u00e9 qui contr\u00f4le les propri\u00e9t\u00e9s telles que\u00a0<\/span>la r\u00e9sistance<\/span><\/strong>, la\u00a0<\/span>ductilit\u00e9<\/span><\/strong>, la\u00a0<\/span>densit\u00e9<\/span><\/strong><\/a>, la\u00a0<\/span>conductivit\u00e9<\/span><\/strong><\/a>\u00a0(propri\u00e9t\u00e9 de conduire ou de transmettre la chaleur, l’\u00e9lectricit\u00e9, etc.) et\u00a0<\/span>la forme<\/span><\/strong>.\u00a0Il existe 14 types g\u00e9n\u00e9raux de ces mod\u00e8les connus sous le nom de\u00a0<\/span>r\u00e9seaux de Bravais<\/span><\/strong>.\u00a0Trois structures cristallines relativement simples se trouvent pour la plupart des m\u00e9taux courants.<\/span><\/p>\n

Hexagonal Compact<\/span><\/h2>\n

Dans un arrangement d’atomes\u00a0<\/span>hexagonal compact<\/span><\/strong>\u00a0(hcp), la cellule unitaire est constitu\u00e9e de trois couches d’atomes.\u00a0Les couches sup\u00e9rieure et inf\u00e9rieure contiennent six atomes aux coins d’un hexagone et un atome au centre de chaque hexagone.\u00a0La couche interm\u00e9diaire contient trois atomes nich\u00e9s entre les atomes des couches sup\u00e9rieure et inf\u00e9rieure, d’o\u00f9 le nom de compact.\u00a0Hexagonal Close Packed (hcp) est l’un des deux types simples de garnissage atomique avec la densit\u00e9 la plus \u00e9lev\u00e9e, l’autre \u00e9tant le cubique \u00e0 faces centr\u00e9es (fcc).\u00a0Cependant, contrairement au fcc, ce n’est pas un r\u00e9seau de Bravais car il existe deux ensembles non \u00e9quivalents de points de r\u00e9seau.\u00a0Les m\u00e9taux contenant des structures HCP comprennent le b\u00e9ryllium, le magn\u00e9sium, le zinc, le cadmium, le cobalt, le thallium et le zirconium.\u00a0Les m\u00e9taux HCP ne sont pas aussi ductiles que les m\u00e9taux FCC.<\/span><\/p>\n

<\/span><\/p><\/div><\/div><\/span><\/p>\n

\n

<\/span>References :<\/div>
\u00a0<\/div><\/div><\/div><\/span>Science des mat\u00e9riaux:<\/span><\/strong><\/p>\n
    \n
  1. D\u00e9partement am\u00e9ricain de l’\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n
  2. D\u00e9partement am\u00e9ricain de l’\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 2 et 2. Janvier 1993.<\/span><\/li>\n
  3. William D. Callister, David G. Rethwisch.\u00a0Science et g\u00e9nie des mat\u00e9riaux : une introduction 9e \u00e9dition, Wiley ;\u00a09 \u00e9dition (4 d\u00e9cembre 2013), ISBN-13\u00a0: 978-1118324578.<\/span><\/li>\n
  4. En ligneEberhart, Mark (2003).\u00a0Pourquoi les choses se cassent\u00a0: Comprendre le monde par la mani\u00e8re dont il se d\u00e9compose.\u00a0Harmonie.\u00a0ISBN 978-1-4000-4760-4.<\/span><\/li>\n
  5. Gaskell, David R. (1995).\u00a0Introduction \u00e0 la thermodynamique des mat\u00e9riaux (4e \u00e9d.).\u00a0\u00c9ditions Taylor et Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><\/li>\n
  6. Gonzalez-Vi\u00f1as, W. & Mancini, HL (2004).\u00a0Une introduction \u00e0 la science des mat\u00e9riaux.\u00a0Presse universitaire de Princeton.\u00a0ISBN 978-0-691-07097-1<\/span><\/li>\n
  7. Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Mat\u00e9riaux: ing\u00e9nierie, science, traitement et conception (1\u00e8re \u00e9d.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><\/li>\n
  8. JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span><\/li>\n<\/ol>\n

    <\/span><\/p><\/div><\/div>

    <\/div>
    <\/div>
    <\/div><\/div>
    \n

    Voir au dessus:<\/span><\/h2>\n

    Structure cristalline\"\" <\/span><\/a><\/span><\/p><\/div><\/div>

    <\/div><\/div><\/span><\/p>\n

    <\/div><\/span><\/p>\n

    Nous esp\u00e9rons que cet article,\u00a0<\/span>Hexagonal Close-packed – hcp Structure<\/span><\/strong>, vous aidera.\u00a0Si oui,\u00a0<\/span>donnez-nous un like<\/span><\/strong>\u00a0dans la barre lat\u00e9rale.\u00a0L’objectif principal de ce site Web est d’aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

    Nous esp\u00e9rons que cet article,\u00a0Hexagonal Close-packed – hcp Structure, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L’objectif principal de ce site Web est d’aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"yoast_head":"\nQu'est-ce que l'Hexagonal Close-packed - Structure hcp - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"Dans un arrangement d'atomes hexagonal compact (hcp), la cellule unitaire est constitu\u00e9e de trois couches d'atomes. 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