Influence of B4C, SiC and Si3N4 Additions on Microstructures and Selected Properties of Titanium Nitride Matrix Materials Obtained by HPHT Method

Jolanta Cyboroń; Piotr Klimczyk; Pawel Figiel; Małgorzata Karolus

doi:10.4028/www.scientific.net/AST.89.109

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 89Influence of B4C, SiC and Si3N4 Additions on...

Influence of B₄C, SiC and Si₃N₄ Additions on Microstructures and Selected Properties of Titanium Nitride Matrix Materials Obtained by HPHT Method

Abstract:

The paper presents the results of the High Pressure and High Temperature (HP-HT) sintering and investigation of Ultra High Temperature Ceramics (UHTC) composites of titanium nitride matrix. The aim of this studies were to determine the influence of additives on the ceramic phase composition, microstructure and selected properties. Three different kind of mixtures were prepared. 8 to 22 wt% B₄C, SiC and Si₃N₄ were added. Composites were sintered under high-pressure high-temperature conditions (HP-HT) using a Bridgman-type apparatus under pressure about 6 GPa. Materials were sintered at the range of 1450 to 1690 ° C, duration of sintering was 60s. The phase composition, microstructure, and the apparent density, Young's modulus, hardness and fracture toughness KIC (HV), using the Vickers indentation method were examined. Sintered titanium nitride with the 22 wt% silicon carbide participation was characterized the best physical and mechanical properties. For this material the relative density is 99%, the Young's modulus 435 GPa, Vickers hardness 18.3 GPa HV1 and fracture toughness 5.5 MPa∙m^1/2.

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Periodical:

Advances in Science and Technology (Volume 89)

Pages:

109-114

DOI:

https://doi.org/10.4028/www.scientific.net/AST.89.109

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Online since:

October 2014

Authors:

Jolanta Cyboroń*, Piotr Klimczyk, Pawel Figiel, Małgorzata Karolus

Keywords:

HPHT, Sintering, Titanium Nitride, UHTC

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