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HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Hot-Pressed TiB2 Ceramics with B4C and C Additives

Hot-Pressed TiB₂ Ceramics with B₄C and C Additives

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Abstract:

Effects of B4C and C additives on the densification behavior, phase composition, and microstructure of TiB2 ceramics were studied. The relative density of pure TiB2 ceramics by hot pressing at 2000°C for 1 h was only 77.4%. With the introduction of B4C and C additives, the relative density increase to 97.4% and 98.1%, respectively. The great improvement on densification was due to the removal of surface oxides of TiB2 powders by reaction with B4C and C additives. Microstructure observation showed the addition of B4C led to some TiB2 grains abnormal growth (>10 µm), whereas the addition of C produced a uniform and fine-grained microstructure.

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High-Performance Ceramics VI

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Periodical:

Key Engineering Materials (Volumes 434-435)

Pages:

182-184

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.434-435.182

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Online since:

March 2010

Authors:

Li Wang, Wei Ming Guo, Yao Gang Li, Guo Jun Zhang

Keywords:

B₄C Additives, C Additives, Densification, Microstructure, TiB₂

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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