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Óxido amorfo muy dúctil a temperatura ambiente y alta tasa de deformación

Erkka J Frankberg^1,2,3, Janne Kalikka⁴, Francisco García Ferré³

¹Unit of Materials Science and Environmental Engineering, Tampere University, Tampere, Finland. erkka.frankberg@tuni.fi lucile.joly-pottuz@insa-lyon.fr.

Science (New York, N.Y.)

|November 16, 2019

Resumen

El óxido de aluminio amorfo exhibe una notable ductilidad, se deforma permanentemente sin fractura a temperatura ambiente. Este avance en las propiedades del vidrio de óxido ofrece el potencial para dispositivos electrónicos y baterías más robustos.

Área de la Ciencia:

Ciencias de los materiales
Mecánica de los sólidos

Sus antecedentes:

Los vidrios de óxido son ampliamente utilizados pero limitados por su fragilidad.
El desarrollo de materiales de vidrio resistentes a los daños es crucial para aplicaciones avanzadas.

Objetivo del estudio:

Para investigar el comportamiento mecánico del óxido de aluminio amorfo a temperatura ambiente y altas tasas de deformación.
Para explorar el potencial de mejora de la ductilidad en vidrios de óxido.

Principales métodos:

Las muestras de óxido de aluminio amorfo de película delgada fueron sometidas a pruebas de alta velocidad de deformación.
Se analizaron los mecanismos de arrastre viscoso para comprender el comportamiento de la deformación.

Principales resultados:

El óxido de aluminio amorfo demostró una deformación plástica permanente hasta el 100% de alargamiento sin fractura.
El material exhibió un flujo viscoso a temperatura ambiente, alcanzando una tensión de flujo significativa.
Las películas delgadas densas y sin defectos mostraron una ductilidad sin precedentes para los óxidos amorfos a bajas temperaturas.

Conclusiones:

Este estudio revela una nueva vía para lograr materiales de óxido amorfo altamente ductiles.
Los hallazgos allanan el camino para aplicaciones de vidrio resistente a daños, mejorando la fiabilidad mecánica en electrónica y baterías.

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