Tape casting of multilayered molybdenum and niobium silicide composites

DREIDY MERCEDES VASQUEZ SANDOVAL, C. Vega Bolivar, A. Antonini, S. Biamino, M. Pavese, P. Fino, C. Badini

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Molybdenum and niobium silicides are promising materials for high temperature structural applications because of their relatively low density, high melting point and high strength. However, the current concern about these materials focuses on their low fracture toughness below the ductile-brittle transition temperature. According to this, it is more effective to use their composites with carbides, borides or other silicides, more than individual phases. This study is based on the development of multilayered composites in the MoSi2-NbSi2 system. Molybdenum and niobium silicide composites of the type x MoSi2 - (1-x) NbSi2 have been prepared with the multilayered structure by tape casting. After the first investigation on the whole range (x varying from 0 to 1) the MoSi2-rich part of the system has been more intensely studied. The process involves slurry preparation and casting, drying, layers stacking, debinding and pressureless sintering. The composition of the slurry before tape casting has been investigated and debinding and sintering have been optimized. The mechanical properties of the resulting materials have been characterized in terms of residual porosity, Young's modulus and bending strength. A preliminary oxidation study has been realised.

Original languageEnglish
Title of host publication11th International Conference and Exhibition of the European Ceramic Society 2009
Pages519-523
Number of pages5
StatePublished - 1 Dec 2009
Event11th International Conference and Exhibition of the European Ceramic Society 2009 - Krakow, Poland
Duration: 21 Jun 200925 Jun 2009

Publication series

Name11th International Conference and Exhibition of the European Ceramic Society 2009
Volume1

Conference

Conference11th International Conference and Exhibition of the European Ceramic Society 2009
CountryPoland
CityKrakow
Period21/06/0925/06/09

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