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Fabrication and properties of HfB2–MoSi2 composites produced by hot pressing and spark plasma sintering

Published online by Cambridge University Press:  01 June 2006

Diletta Sciti ,
Laura Silvestroni  and
Alida Bellosi
Diletta Sciti*
Affiliation:
CNR-ISTEC, Institute of Science and Technology for Ceramics, I-48018 Faenza, Italy
Laura Silvestroni
Affiliation:
CNR-ISTEC, Institute of Science and Technology for Ceramics, I-48018 Faenza, Italy
Alida Bellosi
Affiliation:
CNR-ISTEC, Institute of Science and Technology for Ceramics, I-48018 Faenza, Italy
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

HfB2–15 vol% MoSi2 composites were produced from powder mixtures and densified through different techniques, namely hot pressing and spark plasma sintering. Dense materials were obtained at 1900 °C by hot pressing and at 1750 °C by spark plasma sintering. Microstructure and mechanical properties were compared. The most relevant result was for high-temperature strength: independent of the processing technique, the flexural strength in air at 1500 °C was higher than 500 MPa.

Keywords

HfSinteringStrength
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 6 , June 2006 , pp. 1460 - 1466
Copyright
Copyright © Materials Research Society 2006

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