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Journal of Materials Science

, Volume 43, Issue 19, pp 6414–6421 | Cite as

Spark plasma sintering of ultra refractory compounds

  • Diletta Sciti
  • Mats Nygren
Proceedings of the Symposium on Spark Plasma Synthesis and Sintering

Abstract

Spark plasma sintering experiments were conducted on Zr- and Hf-based borides and carbides with the addition of 1, 3, and 9 vol% MoSi2 as sintering aid. For comparison, as-received ZrC, HfC, ZrB2, HfB2 powders were also sintered. The microstructural features were investigated by means of scanning electron microscop–energy dispersive spectroscopy technique. Silicon carbide was detected in all the doped compositions along with significant amounts of oxide species (Hf/ZrO2, and SiO2). The effect of the MoSi2 content on densification, microstructure, and mechanical properties is analyzed.

Keywords

Spark Plasma Sinter Residual Porosity Monolithic Material Spark Plasma Sinter Process Temperature Mismatch 

Notes

Acknowledgement

The authors wish to thank L. Silvestroni for materials preparation and G. Celotti for X-ray diffraction analysis.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.ISTEC-CNR, Institute for Science and Technology of CeramicsFaenzaItaly
  2. 2.Arrhenius Laboratory, Department of Inorganic ChemistryStockolm UniversityStockolmSweden

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