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Microstructure and Physical Properties of CaF2–MgO Eutectics Produced by the Bridgman Method

Published online by Cambridge University Press:  31 January 2011

A. Larrea ,
L. Contreras ,
R. I. Merino ,
J. Llorca  and
V. M. Orera
A. Larrea
Affiliation:
Instituto de Ciencia de Materiales de AragoÓn, Consejo Superior de Investigaciones Cientificas, Universidad de Zaragoza, E-50015 Zaragoza, Spain
L. Contreras
Affiliation:
Instituto de Ciencia de Materiales de AragoÓn, Consejo Superior de Investigaciones Cientificas, Universidad de Zaragoza, E-50015 Zaragoza, Spain
R. I. Merino
Affiliation:
Instituto de Ciencia de Materiales de AragoÓn, Consejo Superior de Investigaciones Cientificas, Universidad de Zaragoza, E-50015 Zaragoza, Spain
J. Llorca
Affiliation:
Departamento de Ciencia de Materiales, Universidad Politeécnica de Madrid, Escuela Tecnica Superior de Ingenieros de Caminos, E-28040 Madrid, Spain
V. M. Orera
Affiliation:
Instituto de Ciencia de Materiales de AragoÓn, Consejo Superior de Investigaciones Cientificas, Universidad de Zaragoza, E-50015 Zaragoza, Spain
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Abstract

The microstructure and crystallographic orientation relationship of CaF2–MgO eutectics produced for the first time were characterized by electron microscopy. The eutectic contains single-crystal MgO rods (∼0.7 μm in size, spaced ∼8 μm) oriented parallel to the cubic axis of a CaF2 matrix. The rods present low-energy {100}CaF2 //{111}MgO interfaces. Light guiding was experimentally proved and considered for possible optical applications. Crack propagation was also studied to show the potential improvement in fracture toughness through crack deflection at the interfaces.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 6 , June 2000 , pp. 1314 - 1319
Copyright
Copyright © Materials Research Society 2000

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