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A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws
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Materiales híbridos resistentes y de inspiración biológica.

E Munch1, M E Launey, D H Alsem

  • 1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Science (New York, N.Y.)
|December 6, 2008
PubMed
Resumen

Los investigadores crearon un material compuesto basado en cerámica fuerte y resistente imitando estructuras naturales. Este material bioinspirado, que combina óxido de aluminio y metacrilato de polimetilo, muestra propiedades comparables a las aleaciones de aluminio.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • La biomimética es la biomimética.
  • Compuestos cerámicos compuestos de cerámica.

Sus antecedentes:

  • Los compuestos naturales exhiben una resistencia y dureza superiores debido a diseños jerárquicos complejos.
  • La replicación sintética de estas estructuras naturales para materiales avanzados ha demostrado ser un reto.
  • Imitar los mecanismos de endurecimiento de la naturaleza es un objetivo clave en la síntesis de materiales.

Objetivo del estudio:

  • Desarrollar un nuevo material compuesto basado en cerámica bio-inspirado.
  • Para emular los mecanismos de endurecimiento de la naturaleza utilizando compuestos accesibles.
  • Para lograr una alta resistencia y resistencia a la fractura en un material sintético.

Principales métodos:

  • Combinando óxido de aluminio y metacrilato de polimetilo.
  • Utilizando técnicas de plantilla de hielo para crear estructuras jerárquicas.
  • Caracterizar las propiedades mecánicas, incluida la resistencia al rendimiento y la tenacidad a la fractura.

Principales resultados:

  • El material sintetizado demostró una dureza más de 300 veces mayor que sus componentes.
  • Se consigue una resistencia de rendimiento de aproximadamente 200 MPa y una tenacidad a la fractura de aproximadamente 30 MPa.m(1/2).
  • Las propiedades del material son comparables a las de las aleaciones de aluminio.

Conclusiones:

  • Los materiales modelo desarrollados emulan con éxito los mecanismos de endurecimiento de la naturaleza.
  • El diseño bioinspirado que utiliza estructuras con plantillas de hielo es efectivo para crear compuestos de alto rendimiento.
  • Las características microestructurales clave identificadas pueden guiar la síntesis futura de materiales avanzados basados en cerámica.