Enhanced toughness and reliability of Si3N4-SiCw composites under oscillatory pressure sintering

Han, Yao; Li, Shuang; Zhu, Tianbin; Wu, Weiwei; An, Di; Hu, Feng; Zhai, Fengrui; Xie, Zhipeng

doi:10.1016/j.ceramint.2018.03.270

Cited by 24 publications

(4 citation statements)

References 28 publications

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“…From the above analysis, lamellar structure and columnar β‐Si 3 N 4 before hot‐pressing sintering significantly improve the fracture toughness of Si 3 N 4 ceramics and its flexural strength. In addition, it can also be clearly seen in Figure 10 39–47 that the flexural strength and fracture toughness of Si 3 N 4 ceramics prepared based on the foam are relatively high. It is well known that Si 3 N 4 ceramics’ flexural strength and fracture toughness have antagonistic characteristics.…”

Section: Resultsmentioning

confidence: 90%

A novel method of strong and tough Si₃N₄ ceramic from the particle‐stabilized foam

Yang

Zhang

et al. 2023

J Am Ceram Soc.

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The brittleness of Si3N4 ceramics has always limited its wide application. In this paper, Si3N4 ceramics were prepared based on foam. Combining the unique honeycomb structure of the ceramic foams and the self‐toughening mechanism of Si3N4, the strengthening and toughening of Si3N4 ceramics can be further achieved by adjusting the microstructure of Si3N4 ceramic foams. The powder particles are self‐assembled by particle‐stabilized foaming to form a foam body with a honeycomb structure. It was pretreated at different temperatures (1450–1750°C). The microstructure evolution of foamed ceramics at different pretreatment temperatures and the conversion rate of α‐Si3N4 to β‐Si3N4 at different pretreatment temperatures were explored. Then the foamed ceramics with different microstructures are hot‐press sintered to prepare Si3N4 dense ceramics. The effects of different microstructures of foamed ceramics on the strength and toughness of Si3N4 ceramics were analyzed. The experimental results show that the relative density of Si3N4 ceramics prepared at a particle pretreatment temperature of 1500°C is 97.8%, and its flexural strength and fracture toughness are relatively the highest, which are 1089 ± 60 MPa and 12.9 ± 1.3 MPa m1/2, respectively. Compared with the traditional powder hot‐pressing sintering, the improvement is 21% and 33%, respectively. It is shown that this method of preparing Si3N4 ceramics based on foam has the potential to strengthen and toughen Si3N4 ceramics.

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Section: Resultsmentioning

confidence: 90%

A novel method of strong and tough Si₃N₄ ceramic from the particle‐stabilized foam

Yang

Zhang

et al. 2023

J Am Ceram Soc.

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“…By fitting the dependence of Δ W / A on time t , the oxidation kinetics of different alloys are analyzed [ 22 , 23 ]:

…”

Section: Resultsmentioning

confidence: 99%

Plasma Oscillatory Pressure Sintering of Mo-9Si-8B Alloy with ZrB2 Addition

Xiangyu

Guo

et al. 2022

Materials

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Oscillatory pressure sintering is a novel crystal refinement technology. The doping of different concentrations of ZrB2 under oscillatory sintering technology (9 Hz) is discussed here, focusing on its macroscopic mechanics and oxidation resistance. In particular, doping 2.5 wt% ZrB2 can effectively increase the hardness of the alloy, slightly increase the fracture toughness of the alloy and have an outstanding effect on the oxidation resistance of the alloy at 1300 °C, achieving the effect of reducing mass loss by 80.3%.

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“…2 Ever since it was reported in 2014, 1 the technique has been applied to various material systems. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] The results showed that HOP can enhance densification, suppress grain growth, and improve mechanical properties for almost all systems studied so far. It was proposed that these improvements are likely due to that the oscillatory pressure promoted powder agglomeration breaking, grain-boundary sliding, 10 plastic deformation, 6 and facilitate liquid phase distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Hot oscillatory pressing (HOP) is a recently developed pressure‐assisted sintering technique, 1 where oscillatory pressure is used to replace static pressure in traditional hot pressing (HP) 2 . Ever since it was reported in 2014, 1 the technique has been applied to various material systems 3–18 . The results showed that HOP can enhance densification, suppress grain growth, and improve mechanical properties for almost all systems studied so far.…”

Section: Introductionmentioning

confidence: 99%

Effects of oscillatory pressure mode on the sintering behavior of Al₂O_3w–ZrO₂ composite in hot oscillatory pressing

Shao

Zhao

et al. 2022

J Am Ceram Soc.

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Hot oscillatory pressing (HOP) has been shown to be a more effective technology for sintering various material systems than hot pressing sintering due to the use of oscillatory pressure. However, the effect of oscillatory pressure parameters on the sintering behavior is not clear. In this paper, the effect of pressure amplitude, frequency, and mean pressure of oscillatory pressure on the sintering behavior was studied by using sapphire whisker reinforced zirconia ceramic composite as a model material. The obtained results were discussed by considering grain boundary sliding as a viscoelastic process. The current work would provide scientific guidance for determining optimized HOP parameters.

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Enhanced toughness and reliability of Si3N4-SiCw composites under oscillatory pressure sintering

Cited by 24 publications

References 28 publications

A novel method of strong and tough Si₃N₄ ceramic from the particle‐stabilized foam

A novel method of strong and tough Si₃N₄ ceramic from the particle‐stabilized foam

Plasma Oscillatory Pressure Sintering of Mo-9Si-8B Alloy with ZrB2 Addition

Effects of oscillatory pressure mode on the sintering behavior of Al₂O_3w–ZrO₂ composite in hot oscillatory pressing

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Enhanced toughness and reliability of Si3N4-SiCw composites under oscillatory pressure sintering

Cited by 24 publications

References 28 publications

A novel method of strong and tough Si3N4 ceramic from the particle‐stabilized foam

A novel method of strong and tough Si3N4 ceramic from the particle‐stabilized foam

Plasma Oscillatory Pressure Sintering of Mo-9Si-8B Alloy with ZrB2 Addition

Effects of oscillatory pressure mode on the sintering behavior of Al2O3w–ZrO2 composite in hot oscillatory pressing

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A novel method of strong and tough Si₃N₄ ceramic from the particle‐stabilized foam

A novel method of strong and tough Si₃N₄ ceramic from the particle‐stabilized foam

Effects of oscillatory pressure mode on the sintering behavior of Al₂O_3w–ZrO₂ composite in hot oscillatory pressing