Spark plasma and conventional sintering of ZrO2-TiN composites: A comparative study on the microstructure and mechanical properties

Yuri Pristinskiy,Nestor Washington Solis Pinargote,Anton Smirnov,S Bratan,S Leonov,S Roshchupkin,S Gorbatyuk

doi:10.1051/matecconf/201822401055

Yuri Pristinskiy, Nestor Washington Solis Pinargote + Show 5 more

Open Access

https://doi.org/10.1051/matecconf/201822401055

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Abstract

Spark plasma sintering (SPS) is an extremely fast solidification technique for compounds that are difficult to sinter within the material group metals, ceramics or composites. SPS uses a uniaxial pressure and a very rapid heating cycle to consolidate these materials. This direct way of heating allows the application of very high heating and cooling rates, enhancing densification over grain growth promoting diffusion mechanisms allowing maintaining the intrinsic properties of nanopowders in their fully dense products. The ZrO2-TiN cermets prepared by SPS processing achieves the enhanced mechanical properties with the hardness of 15.1 GPa and the fracture toughness of 9.1 MPa∙m1/2 in comparison to standard reference ZrO2-TiN material.

Highlights

IntroductionFor many high demanding applications in the industry and biomedical field technical ceramics (e.g.: Al2O3, SiC, B4C,.Si3N4, etc.) provide solutions, because of their mechanical properties such as: high Young’s modulus, superior abrasion resistance, chemical resistance, high melting point and dimensional stability [1]
For many high demanding applications in the industry and biomedical field technical ceramics (e.g.: Al2O3, SiC, B4C,.Si3N4, etc.) provide solutions, because of their mechanical properties such as: high Young’s modulus, superior abrasion resistance, chemical resistance, high melting point and dimensional stability [1].Usually, these materials processed by mechanical methods, which include the processing of a diamond cutting tool
XRD analysis revealed the presence of zirconium oxide (■) and titanium nitride (●) phases, without any additional peaks appearing

Summary

Introduction

For many high demanding applications in the industry and biomedical field technical ceramics (e.g.: Al2O3, SiC, B4C,.Si3N4, etc.) provide solutions, because of their mechanical properties such as: high Young’s modulus, superior abrasion resistance, chemical resistance, high melting point and dimensional stability [1]. These materials processed by mechanical methods, which include the processing of a diamond cutting tool. Zirconium oxide (ZrO2), known to the general public for its use in the biomedical industry, has a good fracture toughness This material cannot be machined using the conventional EDM setup, as it is one of the worst electro-conductive materials. Zirconium oxide has a low hardness, which limits its use in wear conditions [4]

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