Characterization of spark plasma sintered TiC–Si3N4 ceramics

Pazhouhanfar, Yaghoub; Delbari, Seyed Ali; Asl, Mehdi Shahedi; Shaddel, Shahrzad; Pazhouhanfar, Morteza; Le, Quyet Van; Shokouhimehr, Mohammadreza; Mohammadi, Mohsen; Namini, Abbas Sabahi

doi:10.1016/j.ijrmhm.2020.105444

Cited by 18 publications

(5 citation statements)

References 46 publications

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“…The strength of composites is affected by the properties of the second phase itself. Pazhouhanfa et al [53] added a harder material, Si 3 N 4 , obtaining TiC-5 wt.% Si 3 N 4 composites using the same method (SPS, 1900 • C), but the mechanical properties of the matrix were not positively affected by the Si 3 N 4 phase, and the flexural strength was even 43.4% of that of pure TiC. This phenomenon was caused by the complex reaction between Si 3 N 4 and the TiC matrix during hot pressing, as gases were produced in these reactions, as shown in Figure 9a; Equations ( 1)-( 3) describe this process.…”

Section: Effect Of Nitride On Tic-based Compositesmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Reinforcement Mechanism of Second-Phase Reinforced TiC-Based Composites: A Review

et al. 2022

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TiC ceramics have the characteristics of high melting point and density, and titanium reserves on earth are extremely large; therefore, TiC ceramics are considered ultra-high temperature materials with great research value. However, the development of TiC-based ultra-high temperature composites has been seriously hindered by their poor mechanical properties. At present, improvement of the mechanical properties of TiC is mainly accomplished by adding a second phase. In this paper, the research status of modified elements-, nitrides-, and metal-reinforced TiC matrix composites is presented. The microstructure, phase composition, and toughening mechanism of TiC matrix composites reinforced by a second phase are described. The influence of the reaction products on the matrix during the toughening process is also discussed.

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Section: Effect Of Nitride On Tic-based Compositesmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Reinforcement Mechanism of Second-Phase Reinforced TiC-Based Composites: A Review

et al. 2022

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“…This enables the processing of compacts without degrading their inherent properties. Grain coarsening can be prohibited by SPS more than conventional powder sintering [ 51 ]. SPS provides an advantage in processing materials with thermal instabilities such as calcium phosphates.…”

Section: Conventional Sinteringmentioning

confidence: 99%

Advances in Sintering Techniques for Calcium Phosphates Ceramics

et al. 2021

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Calcium phosphate (CaP) biomaterials are extensively used to reconstruct bone defects. They resemble a chemical similarity to the inorganic mineral present in bones. Thus, they are termed as the key players in bone regeneration. Sintering is a heat treatment process applied to CaP powder compact or fabricated porous material to impart strength and integrity. Conventional sintering is the simplest sintering technique, but the processing of CaPs at a high temperature for a long time usually leads to the formation of secondary phases due to their thermal instability. Furthermore, it results in excessive grain growth that obstructs the densification process, limiting the application of CaP’s ceramics in bone regeneration. This review focuses on advanced sintering techniques used for the densification of CaPs. These techniques utilize the synergy of temperature with one or more parameters such as external pressure, electromagnetic radiation, electric current, or the incorporation of transient liquid that boosts the mass transfer while lowering the sintering temperature and time.

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“…Therefore, in this paper, the effect of SiC content on the densification behavior, microstructure, and mechanical property of LaB 6 ‐SiC composite was systematically investigated by SPS, which is known as rapid consolidation of powders by using field‐assisted sintering, high heating rate, short dwell time and pulsed DC current along with the vertical pressure 24 . Additionally, the thermionic emission character of LaB 6 ‐SiC composite was firstly investigated due to LaB 6 with the excellent thermionic emission property.…”

Section: Introductionmentioning

confidence: 99%

The densification behavior, microstructure, mechanical, and thermionic emission properties of LaB6‐SiC composite

Yang,

Zhao,

Wang

et al. 2023

Int J Applied Ceramic Tech

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The LaB6‐SiC composite with the different SiC content (0, 15, 30, 36, 50, 90, and 100 wt.%,) was densified by spark plasma sintering. The effects of SiC content on the densification behavior, microstructure, mechanical, and thermionic emission properties of LaB6‐SiC composite were systemically investigated. The results show that all the rapid shrinkage occurred at the heating stage during densification, and LaB6‐36 wt.%SiC composite owned the maximum shrinkage rate of 1.5 mm/min at T = 1798oC. The highest relative density of the composite decreased from 98.18% to 95.01% as the SiC content increased from 15 wt.% to 90 wt.%, under which the morphology of LaB6 grain evaluated from the equiaxed to elongated structure, and LaB6 grain size varied in the range of 5.05–11.42 μm. The similar eutectic structures were observed in the LaB6‐36 wt.% SiC composite because of some LaB6 grains melting. Both the highest fracture toughness of 5.15 ± 0.56 MPa.m1/2 and the highest bending strength of 313 ± 4.7 MPa belonged to the LaB6‐36 wt.% SiC composite, which also exhibited thermionic emission current density of 10.74 A/cm2 and work function of 2.99 eV at T = 1873 K.

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Characterization of spark plasma sintered TiC–Si3N4 ceramics

Cited by 18 publications

References 46 publications

Microstructure, Mechanical Properties, and Reinforcement Mechanism of Second-Phase Reinforced TiC-Based Composites: A Review

Microstructure, Mechanical Properties, and Reinforcement Mechanism of Second-Phase Reinforced TiC-Based Composites: A Review

Advances in Sintering Techniques for Calcium Phosphates Ceramics

The densification behavior, microstructure, mechanical, and thermionic emission properties of LaB6‐SiC composite

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