Open AccessPhysical and mechanical properties of the hotpressed ZrB<sub>2</sub>‒TaC‒SiC materials
Author(s) -
Д. Д. Несмелов,
И. Д. Шабалкин,
А. С. Лысенков,
С. С. Орданьян
Publication year - 2018
Publication title -
novye ogneupory
Language(s) - English
Resource type - Journals
ISSN - 1683-4518
DOI - 10.17073/1683-4518-2018-10-16-23
Subject(s) - materials science , vickers hardness test , isothermal process , flexural strength , cracking , composite material , ceramic , indentation hardness , microstructure , metallurgy , thermodynamics , physics
The high-density (with the relative density up to 98,8 %) ultrahigh temperature ZrB 2 ‒TaC‒SiC ceramic materials (UHTCs) were prepared by means of the hot Argon pressing 30 MPa at 2000 °C, and isothermal time 15 minutes. After this the phase composition, crystal lattice parameters, ultimate bending stress, Vickers hardness, and the cracking resistance were investigated. The maximum values of the bent stress, hardness, and cracking resistance were 440 MPa, 20 GPa and 5,3 MPa·m 1/2 respectively. It was shown that the ZrB 2 /TaC ration inuenced both the crystal lattice spacing and the mechanical properties of the material.Ill. 7. Ref. 50. Tab. 4.