{"id":67184,"date":"2007-06-06T09:31:00","date_gmt":"2007-06-06T09:31:00","guid":{"rendered":"http:\/\/weblogs.madrimasd.org\/\/tecnologia_polvos\/archive\/2007\/06\/06\/67184.aspx"},"modified":"2007-06-06T09:31:00","modified_gmt":"2007-06-06T09:31:00","slug":"nuevo-material-superduro","status":"publish","type":"post","link":"https:\/\/www.madrimasd.org\/blogs\/tecnologia_polvos\/2007\/06\/06\/67184","title":{"rendered":"Nuevo material superduro"},"content":{"rendered":"<p><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">La Tecnolog\u00eda de Polvos, una vez m\u00e1s, herramienta en el desarrollo de nuevos materiales, esta vez en el terreno de los \u00abhardmaterials\u00bb.<\/SPAN><\/P><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\"><\/SPAN>&nbsp;<\/P><!--more--><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-language: AR-SA\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\"><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">Se ha desarrollado un nuevo material \u2018super-duro\u2019 por Tecnolog\u00eda de Polvos: el Diboruro de Rhenio. <SPAN style=\"mso-spacerun: yes\">&nbsp;<\/SPAN>Puede rallar el diamante con facilidad y se puede fabricar con sencillez. Hasta ahora todos los materiales que compet\u00edan con el diamante en dureza se fabricaban a altas presiones y temperaturas. Este Nuevo Material se obtiene por mezcla estequiom\u00e9trica del Boro y el Rhenio por la que se hace pasar una corriente el\u00e9ctrica (sinterizaci\u00f3n por resistencia). <?xml:namespace prefix = o ns = \"urn:schemas-microsoft-com:office:office\" \/><o:p><\/o:p><\/SPAN><\/P><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">En el dise\u00f1o del material se consider\u00f3 el porqu\u00e9 una substancia es dura. Los metales que se comprimen con dificultad es porque sus \u00e1tomos llevan densos recubrimientos de electrones que repelen a los \u00e1tomos vecinos, pese a que esto tambi\u00e9n implica que se puedan doblar. Por otro lado, los \u00e1tomos de cristales r\u00edgidos, como el diamante, tienen enlaces direccionados y r\u00edgidos en direcciones fijas, que implican una gran resistencia a ser deformados. Los creadores de este nuevo material (Tolbert y colaboradores) han combinado Rhenio (metal dif\u00edcil de comprimir con Boro, capaz de formar enlaces direccionados fuertes).<o:p><\/o:p><\/SPAN><\/P><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">El Diboruro de Rhenio, tiene una dureza equivalente al nitruro de boro c\u00fabico, pero su fabricaci\u00f3n es significativamente m\u00e1s sencilla.<\/SPAN><\/P><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\"><IMG alt=\"\" src=\"\/blogs\/tecnologia_polvos\/wp-content\/blogs.dir\/101\/files\/696\/t_diboruro%20de%20rhenio.JPG\" border=0><\/SPAN><\/P><P class=MsoNormal style=\"MARGIN: 6pt 0cm; TEXT-ALIGN: justify; mso-margin-top-alt: auto\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">Diboruro de Rhenio<\/SPAN><\/P><\/SPAN><\/SPAN><P><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-language: AR-SA\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">&nbsp;<\/P><P><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\"><o:p><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: ES; mso-bidi-language: AR-SA; mso-no-proof: yes\"><P class=MsoNormal style=\"MARGIN: 0cm 0cm 3.75pt\"><SPAN lang=EN style=\"FONT-SIZE: 8pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN\"><o:p><\/o:p><\/SPAN><\/P><\/SPAN><\/o:p><\/SPAN><\/SPAN><\/SPAN><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-language: AR-SA\"><SPAN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES\">M\u00e1s informaci\u00f3n: <SPAN lang=EN style=\"FONT-SIZE: 10pt; COLOR: #333333; FONT-FAMILY: Wingdings; mso-fareast-font-family: Wingdings; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 9.5pt\"><SPAN style=\"mso-list: Ignore\"><SPAN style=\"FONT: 7pt 'Times New Roman'\">&nbsp;<\/SPAN><\/SPAN><\/SPAN><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN\"><A href=\"http:\/\/tolbert.chem.ucla.edu\/\" target=ns><SPAN style=\"COLOR: #664499; TEXT-DECORATION: none; mso-bidi-font-size: 11.0pt; text-underline: none\">Sarah Tolbert, University of California at Los Angeles<\/SPAN><\/A>; <\/SPAN><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-language: AR-SA\"><A href=\"http:\/\/www-cmls.llnl.gov\/?url=science_and_technology-materials\" target=ns><SPAN style=\"COLOR: #664499; TEXT-DECORATION: none; mso-bidi-font-size: 11.0pt; text-underline: none\">Materials, Lawrence Livermore National Laboratories;&nbsp;&nbsp;<\/SPAN><\/A><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-language: AR-SA\">Science<\/SPAN><SPAN lang=EN style=\"FONT-SIZE: 9.5pt; COLOR: #333333; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: EN; mso-bidi-language: AR-SA\"> (vol 316, p 436).<\/SPAN><\/SPAN><\/SPAN><\/SPAN> <P><\/P><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La Tecnolog\u00eda de Polvos, una vez m\u00e1s, herramienta en el desarrollo de nuevos materiales, esta vez en el terreno de los \u00abhardmaterials\u00bb. &nbsp;<\/p>\n","protected":false},"author":78,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[1],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":4}},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"La Tecnolog\u00eda de Polvos, una vez m\u00e1s, herramienta en el desarrollo de nuevos materiales, esta vez en el terreno de los &quot;hardmaterials&quot;. 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