Microstructural and mechanical study of AL2O3/Er3Al5O12 eutectic rods grown by the laser floating zone method

Mesa, M.C. and Oliete Terraz, Patricia Beatriz and Orera, V.M. and Pastor Caño, Jose Ignacio and Martin Sanz, Antonia and Llorca Martinez, Francisco Javier (2011). Microstructural and mechanical study of AL2O3/Er3Al5O12 eutectic rods grown by the laser floating zone method. "Journal of the European Ceramic Society", v. 31 (n. 7); pp. 1241-1250. ISSN 0955-2219. https://doi.org/10.1016/j.jeurceramsoc.2010.05.004.

Description

Title: Microstructural and mechanical study of AL2O3/Er3Al5O12 eutectic rods grown by the laser floating zone method
Author/s:
  • Mesa, M.C.
  • Oliete Terraz, Patricia Beatriz
  • Orera, V.M.
  • Pastor Caño, Jose Ignacio
  • Martin Sanz, Antonia
  • Llorca Martinez, Francisco Javier
Item Type: Article
Título de Revista/Publicación: Journal of the European Ceramic Society
Date: June 2011
ISSN: 0955-2219
Volume: 31
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Eutectic rods of Al2O3–Er3Al5O12 were grown by directional solidification using the laser-heated floating zone method at rates in the range 25–1500 mm/h. Their microstructure and mechanical properties (hardness, toughness and strength) were investigated as a function of the growth rate. A homogeneous and interpenetrated microstructure was found in most cases, and interphase spacing decreased with growth rate following the Hunt–Jackson law. Hardness increased slightly as the interphase spacing decreased while toughness was low and independent of the microstructure. The rods presented very high bending strength as a result of the homogeneous microstructure, and their strength increased rapidly as the interphase spacing decreased, reaching a maximum of 2.7 GPa for the rods grown at 750 mm/h. The bending strength remained constant up to 1300 K and decreased above this temperature. The relationship between the microstructure and the mechanical properties was established from the analysis of the microstructure and of the fracture mechanisms

More information

Item ID: 12134
DC Identifier: http://oa.upm.es/12134/
OAI Identifier: oai:oa.upm.es:12134
DOI: 10.1016/j.jeurceramsoc.2010.05.004
Deposited by: Memoria Investigacion
Deposited on: 10 Sep 2012 11:43
Last Modified: 11 Jun 2015 15:57
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