Structure and mechanical properties of hot- pressed composite ceramics W 2 B 5 ‒ZrB 2 ‒SiC‒B 4 C

D. D. Nesmelov; S. S. Ordan’yan; Yu. P. Udalov

doi:10.17073/1683-4518-2021-4-27-33

Structure and mechanical properties of hot- pressed composite ceramics W₂B₅‒ZrB₂‒SiC‒B₄C

D. D. Nesmelov, S. S. Ordan’yan, Yu. P. Udalov

https://doi.org/10.17073/1683-4518-2021-4-27-33

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Abstract

A high-density ceramic material (97 % of theoretical density) was obtained by hot pressing of ball-milled powders W₂B₅, ZrB₂, SiC and B₄C with holding for 15 minutes at a temperature of 1850 ^°C and a pressure of 30 MPa in an argon atmosphere. The structure and composition of material were investigated by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Vickers hardness (19,3 GPa), crack resistance coefficient (5,7 MPa·m^1/2) and bending strength (695 MPa) were determined.

Keywords

ceramics, hot pressing, tungsten boride, zirconium boride, silicon carbide, boron carbide, bending strength, flexural strength, hardness, fracture toughness,

About the Authors

D. D. Nesmelov

Saint Petersburg State Institute of Technology
Russian Federation

S. S. Ordan’yan

Saint Petersburg State Institute of Technology
Russian Federation

Yu. P. Udalov

Saint Petersburg State Institute of Technology
Russian Federation

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Supplementary files

For citation: Nesmelov D.D., Ordan’yan S.S., Udalov Y.P. Structure and mechanical properties of hot- pressed composite ceramics W₂B₅‒ZrB₂‒SiC‒B₄C. NOVYE OGNEUPORY (NEW REFRACTORIES). 2021;(4):27-33. https://doi.org/10.17073/1683-4518-2021-4-27-33

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NOVYE OGNEUPORY (NEW REFRACTORIES)

Structure and mechanical properties of hot- pressed composite ceramics W2B5‒ZrB2‒SiC‒B4C

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Structure and mechanical properties of hot- pressed composite ceramics W₂B₅‒ZrB₂‒SiC‒B₄C