Spark plasma and conventional sintering of ZrO<sub>2</sub>-TiN composites: A comparative study on the microstructure and mechanical properties

Pristinskiy, Yuri; Pinargote, Nestor Washington Solís; Smirnov, Antón

doi:10.1051/matecconf/201822401055

Cited by 5 publications

(8 citation statements)

References 17 publications

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“…Larger Y-TZP grains are known to exhibit a higher stress-induced tetragonal-to-monoclinic toughening [40]. The same observations relating to MCP-prepared composites were already reported by other authors [34,35,41].…”

Section: Resultssupporting

confidence: 58%

“…Several recent studies demonstrated an ability to prepare uniformly dense, fine-grained microstructures of either Y-TZP [28,29,30] or TiN [31,32,33] by SPS. However, there are only a handful of studies that have investigated the SPS of Y-TZP-TiN nanocomposites [34,35] that lead to dense composites possessing better mechanical and electrical properties than pure Y-TZP ceramics. The enhanced toughness (7.6 MPa·m 1/2 ) and electrical conductivity (0.12 × 10 −6 S·m −1 ) of composites containing 35 vol% TiN, sintered by FAST (1550 °C for 2 min, applying a pressure of 56 MPa), was reported by Vanmeensel et al [36].…”

Section: Introductionmentioning

confidence: 99%

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TiN-Nanoparticulate-Reinforced ZrO2 for Electrical Discharge Machining

et al. 2019

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This study presents a fabrication route for an electrically conductive ZrO2–TiN ceramic nanocomposite with a nanoscale TiN phase occupying ≤30 vol% to improve the mechanical reinforcement of the zirconia matrix, and at the same time provide electrical conductivity to facilitate electro-discharge machining (EDM). The TiN nanoparticles were incorporated into a 3 mol% yttria-stabilized tetragonal zirconia (Y-TZP) powder, either by admixing a TiN nanopowder (MCP) or by using in-situ synthesis (ISS) via the forced hydrolysis of a titanyl sulphate aqueous solution and the direct nitriding of as-synthesized titania nanoparticles, followed by consolidation and rapid sintering in a spark plasma sintering (SPS) system. The initial phase composition and crystal structure of the as-synthesized powders and the sintered samples were characterized by transmission electron microscopy (TEM) and X-ray difraction (XRD). The influence of the different fabrication routes on the microstructural evolution, electrical and mechanical properties, and affinity for EDM were assessed using TEM, focused ion beam scanning electron microscopy (FIB-SEM, Vickers indentation, electrical conductivity measurements, and profilometry. The MCP synthesis route resulted in finer microstructures that are less prone to microstructural inhomogeneities; however, using the ISS route, it was possible to fabricate electrically conductive Y-TZP nanocomposites containing only 15 vol% of the TiN nanoparticulate phase. Both synthesis routes resulted in an increase of the fracture toughness with an increase of the TiN phase due to the nanoparticulate TiN reinforcement of the Y-TZP ceramic matrix via crack-bridging toughening mechanisms. As both synthesis routes yielded Y-TZP nanocomposites capable of successful EDM machining at a TiN content of ≥30 vol% for the MCP and ≥ 15 vol% TiN for the ISS, a possible mechanism was developed based on the microstructure evolution and grain growth.

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Section: Resultssupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

TiN-Nanoparticulate-Reinforced ZrO2 for Electrical Discharge Machining

et al. 2019

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“…These densification and microstructural behaviour that was achieved was stated to be of good improvement above previous related work by others [94,95]. The Vickers hardness increment was attributed to the effect of TiN content in the composites as it is represented graphically in Figure 7 Pristinskiy et al [99] examined the influence of SPS processing parameters on the densification and mechanical properties of 3% mol-% yttria -ZrO 2 doped with TiN. The ceramic matrix of ZrO 2 was reinforced with 20%, 30%, and 40% TiN, the composites were sintered at 1300-1500°C under 80 MPa for 3 min.…”

Section: The Effects Of Sintering Additives On the Consolidation Of S...supporting

confidence: 63%

“…Pristinskiy et al [99] examined the influence of SPS processing parameters on the densification and mechanical properties of 3% mol-% yttria -ZrO 2 doped with TiN. The ceramic matrix of ZrO 2 was reinforced with 20%, 30%, and 40% TiN, the composites were sintered at 1300–1500°C under 80 MPa for 3 min.…”

Section: The Effects Of Sintering Additives On the Consolidation Of S...mentioning

confidence: 99%

The effects of sintering additives on the ceramic matrix composite of ZrO₂: microstructure, densification, and mechanical properties – a review

Oguntuyi

Johnson

Shongwe

et al. 2021

Advances in Applied Ceramics

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The latest technological requirement demands a huge (but sometimes challenging) variety of properties which perhaps are impossible in monolithic or traditional materials. This has innovated the introduction of reinforcement in traditional materials such that the resulting composite material would be an advantage for the collaborating influence of the combined matrix and the reinforcement. Single-phase ceramics have been limited in application due to low densification and poor properties. Hence, ceramic matrix composite is the family of materials that have undertaken quick innovation in past years because of its auspicious properties for structural and functional usage. This concept has made the incorporation of sintering additives into the monolithic form of ZrO 2 of high importance because of the poor densification and fracture toughness of undoped ZrO 2 . The addition of sintering additives provides good functionality to the improvement of ceramic materials. This paper painstakingly reviews the effects of diverse sintering additives such as carbides, borides, nitrides on the microstructure, densification, and mechanical properties of ZrO 2 ceramic matrix using different sintering techniques and it lastly stated a futuristic approach to the enhancement and characterisation needed for ZrO 2 ceramic matrix composites.

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“…This gives the SPS method certain advantages, such as high heating rates (from 100 °C/min to 1000 °C/min) that permit faster densification, which allows sintering at lower temperatures and also with very short cycles, reducing grain growth [ 56 , 57 , 58 , 59 , 60 ]. Moreover, the possibility of applying external pressure during the sintering process makes it possible to carry out the consolidation of poorly sinterable ceramics in very short times, producing materials with better mechanical properties [ 61 , 62 ].…”

Section: Introductionmentioning

confidence: 99%

Processing and Characterization of Spark Plasma Sintered SiC-TiB2-TiC Powders

et al. 2022

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SiC-TiB2-TiC composites with matrices consisting of semiconductor material (SiC), conductive materials (TiB2-TiC), or their combination were fabricated by spark plasma sintering (SPS) at 2000 °C in a vacuum under a pressure of 80 MPa for 3 min. The composition and microstructure of the obtained composites were studied by X-ray diffraction and a scanning electron microscope equipped with an energy-dispersive detector. The flexural strength, Vickers hardness, and fracture toughness of SPSed samples were determined. Based on the observations in this work, three variations of the sintering process were proposed with different matrix compositions. The dense (99.7%) 60SiC-25TiB2-15TiC vol.% sintered ceramic composites exhibited the highest strength and hardness values of the studied composites, as well as a fracture toughness of 6.2 MPa·m1/2.

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

Cited by 5 publications

References 17 publications

TiN-Nanoparticulate-Reinforced ZrO2 for Electrical Discharge Machining

TiN-Nanoparticulate-Reinforced ZrO2 for Electrical Discharge Machining

The effects of sintering additives on the ceramic matrix composite of ZrO₂: microstructure, densification, and mechanical properties – a review

Processing and Characterization of Spark Plasma Sintered SiC-TiB2-TiC Powders

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

Cited by 5 publications

References 17 publications

TiN-Nanoparticulate-Reinforced ZrO2 for Electrical Discharge Machining

TiN-Nanoparticulate-Reinforced ZrO2 for Electrical Discharge Machining

The effects of sintering additives on the ceramic matrix composite of ZrO2: microstructure, densification, and mechanical properties – a review

Processing and Characterization of Spark Plasma Sintered SiC-TiB2-TiC Powders

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

The effects of sintering additives on the ceramic matrix composite of ZrO₂: microstructure, densification, and mechanical properties – a review