Characterization of ZrN-ZrB2 nanocomposites

DATE :Mar 15, 2022
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Zirconium nitride ( ZrN ) has high melting point ( 2 980 ℃ ), high hardness (about 13 GPa ), high bulk elastic modulus ( 328 GPa ), high thermal conductivity ( 20.5 W/ ( m · K) ), low Resistivity (13.6 μΨ·cm), good chemical and thermal stability, excellent mechanical/abrasion properties, and color similar to gold, etc., can be used as a wear-resistant and corrosion-resistant layer in the mechanical industry, and can be used in the electronics industry. As an electrical contact layer, it can be used as a decorative film in the jewelry industry.
Since both ZrN and ZrB2 belong to covalent bond compounds with high melting point, the diffusion coefficient is very small at high temperature, and high sintering temperature (above 1850 ℃) is required to densify them. Scholars at home and abroad have used various sintering processes to study the densification of ZrN and ZrB2 materials in order to improve the comprehensive properties of the materials.
Combining the high bulk elastic modulus and excellent electrical conductivity of ZrB2 with the corrosion resistance and high temperature oxidation resistance of ZrN to achieve complementary advantages, it is expected to produce composite materials with excellent mechanical and electrical properties.