Mechanical properties of silicon nitride-based ceramics and its use in structural applications at high temperatures

Bocanegra‐Bernal, M.H.; Matović, Branko

doi:10.1016/j.msea.2009.09.064

Cited by 184 publications

(81 citation statements)

References 186 publications

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“…The apparent density of the solid phase in the porous grid-like parts was 3.18AE0.01 g/cm 3 , approximately 99% of the value (~3.23 g/cm 3 ) reported in the literature for fully dense Si 3 N 4 fabricated with the sintering additives used in this study. The porosity of the open macropores in the porous grid-like parts was 51.5% and 56.5%, respectively, for the cube-shaped and beam-shaped samples, and the pore width was~350 lm in the plane of deposition.…”

Section: Microstructure Of Fabricated Si 3 N 4 Partssupporting

confidence: 57%

“…[1][2][3] Si 3 N 4 materials fabricated by conventional powder processing routes can be modified by controlled thermal treatment to produce a microstructure composed of elongated (fibrous) grains with enhanced fracture toughness. These in situ toughened Si 3 N 4 ceramics have shown a combination of flexural strength (>1 GPa) and fracture toughness (up to 10 MPa m 1/ 2 ) that are among the highest measured values for ceramic materials.…”

Section: Introductionmentioning

confidence: 99%

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Robocasting of silicon nitride with controllable shape and architecture for biomedical applications

Zhao

Xiao

Rahaman

et al. 2016

Int J Applied Ceramic Tech

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Silicon nitride (Si 3 N 4 ) implants are used in spinal fusion surgery and are under development for use in other biomedical applications. The ability to create Si 3 N 4 implants with anatomically relevant shapes and controllable architecture can be beneficial in these applications. In the present study, an aqueous paste composed of Si 3 N 4 powder and sintering additives was prepared with the requisite rheology and formed into structures with different geometry and architecture using a robocasting technique.Sintering and hot isostatic pressing produced an almost fully dense Si 3 N 4 phase (density=3.23AE0.01 g/cm 3 ) with a fibrous microstructure. Four-point bending tests of as-fabricated dense beams showed a flexural strength of 552AE68 MPa. Together, these results indicate that robocasting combined with sintering and hot isostatic pressing can provide a viable manufacturing approach to create Si 3 N 4 implants with controllable shape and architecture for applications in orthopedic and dental surgery. K E Y W O R D Sadditive manufacturing, flexural strength, rheology, robocasting, silicon nitride

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Section: Microstructure Of Fabricated Si 3 N 4 Partssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Robocasting of silicon nitride with controllable shape and architecture for biomedical applications

Zhao

Xiao

Rahaman

et al. 2016

Int J Applied Ceramic Tech

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“…Among them, Si 3 N 4 ceramics are one of the most intensively studied ceramics in high temperature applications due to their superior antioxidation (>1200 • C), mechanical and chemical stabilization properties. [9][10][11][12][13][14][15][16] More importantly, owing to the excellent electrical insulation property and low dielectric constant, Si 3 N 4 ceramics are expected to be the promising candidate matrix of the high-temperature microwave absorbing materials. [17][18][19][20][21][22][23] Despite of the systematic studies related to dielectric properties of Si 3 N 4 ceramic composites from both experimental 13,[24][25][26][27] and theoretical aspects, 28,29 dielectric properties of Si 3 N 4 ceramic in a wide temperature range are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on dielectric response in X-band of silicon nitride ceramics prepared by gelcasting

et al. 2018

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Due to the drastic aerodynamic heating effect in supersonic aircrafts, the operational performance of wave-transmitting dielectric ceramics functionalized radomes strongly depends on the temperature and oxidation. In this paper, the evolution of microwave dielectric responses in Si3N4 ceramics via gelcasting over a wide temperature range (25°C∼800°C) is investigated experimentally and theoretically. Specifically, the relative increment rate of real permittivity over evaluated temperature range is 4.46% at 8.2GHz and 8.67% at 12.4GHz, while the imaginary permittivity remains less than 0.06. Taking temperature-dependent polarized bound charge and damping coefficient into consideration, a revised dielectric relaxation model with Lorentz correction for Si3N4 ceramics has been established, which agrees well with evolution of experimental results. Furthermore, the best fitting results indicate that the activation energy of electrons Ea (15.46 ∼17.49 KJ/mol) is less than that of lattice Eb (33.29∼40.40 KJ/mol), which could be ascribed to the binding force between the electrons and nucleus is lower than covalent bonding force of lattice. Besides, excellent restorable feature of permittivity after heat-treatment lays a solid foundation for radome materials serviced in high temperature circumstances.

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“…Due to their excellent properties such as high temperature strength, low thermal expansion coefficient, high refractoriness under load and good chemical stability, silicon nitride bonded silicon carbide (Si 3 N 4 -SiC) materials have been used increasingly as a refractory in blast furnaces [1][2][3][4][5][6][7][8][9][10]. However, Si 3 N 4 -SiC possesses some weaknesses, such as great brittleness, poor thermal shock resistance and bad thermal conductivity, which restricts its further application.…”

Section: Introductionmentioning

confidence: 99%

Research on High Performance Fe3Si-Si3N4-SiC Composite Used for Blast Furnace

Li¹,

Zhu²,

Zhai³

et al. 2012

TOMSJ

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Excellent Fe 3 Si-Si 3 N 4 -SiC composites were successfully prepared with FeSi75 and SiC as main starting materials by nitridation reaction(at 1300°C for 8Hrs). The material properties were studied; the ferrosilicon nitridation mechanism was analyzed through chemical thermodynamics; phase composition, microstructure, corrosion resistance of products were also investigated. The results are shown that the comprehensive properties of Fe 3 Si-Si 3 N 4 -SiC are outstanding. The nitridation products are fiber-like -Si 3 N 4 and rod-like -Si 3 N 4 , which makes better mechanical behavior due to fiber reinforcement; a great deal of Fe 3 Si intermetallic compounds uniformly distribute in matrix, which is one of the products of Fe-Si nitridation and as a plastic phase forming in grain boundary optimizes the performance of products. Chemical thermodynamic analysis is shown that the fiber-like -Si 3 N 4 is formed by SiO(g) and N 2 (g) reaction which also increases the rate of nitridation. Fe 3 Si-Si 3 N 4 -SiC material has high corrosion resistance. Now it has been successfully applied to one 2000M 3 domestic steel plant, the blast furnace operation goes well.

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Mechanical properties of silicon nitride-based ceramics and its use in structural applications at high temperatures

Cited by 184 publications

References 186 publications

Robocasting of silicon nitride with controllable shape and architecture for biomedical applications

Robocasting of silicon nitride with controllable shape and architecture for biomedical applications

Effect of temperature on dielectric response in X-band of silicon nitride ceramics prepared by gelcasting

Research on High Performance Fe3Si-Si3N4-SiC Composite Used for Blast Furnace

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