Fabrication and mechanical properties of self-toughening ZrB2–SiC composites from in-situ reaction

Zhang, Zhaofu; Sha, Jianjun; Zu, Yufei; Dai, Jixiang; Liu, Yingjun

doi:10.1007/s40145-019-0334-4

Cited by 53 publications

(16 citation statements)

References 33 publications

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“…Thus, it is common to incorporate a high-temperature ceramic phase with excellent oxidation resistance performance to improve the high-temperature behavior and oxidation resistance properties of the matrix phase [17]. However, the control of high-temperature ceramic composition and content in a wide range is hardly to achieve [18]. It is mostly confined to carbide precursors, such as ZrC or HfC, being usually less than 10 vol% [19,20].…”

Section: Introduction mentioning

confidence: 99%

Using PyC modified 3D carbon fiber to reinforce UHTC under low temperature sintering without pressure

Cheng

Xun

et al. 2021

J Adv Ceram

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Finding the optimum balance between strength and toughness, as well as acquiring reliable thermal shock resistance and oxidation resistance, has always been the most concerned topic in the discussion of ultra-high temperature ceramic composites. Herein, PyC modified 3D carbon fiber is used to reinforce ultra-high temperature ceramic (UHTC). The macroscopic block composite with large size is successfully fabricated through low temperature sintering at 1300 °C without pressure. The prepared PyC modified 3D Cf/ZrC-SiC composites simultaneously possess excellent physical and chemical stability under the synergistic effect of PyC interface layer and low temperature sintering without pressure. The fracture toughness is increased in magnitude to 13.05 ± 1.72 MPa·m1/2 accompanied by reliable flexural strength of 251 ± 27 MPa. After rapid thermal shock spanning from room temperature (RT) to 1200 °C, there are no visible surface penetrating cracks, spalling, or structural fragmentation. The maximum critical temperature difference reaches 875 °C, which is nearly three times higher than that of traditional monolithic ceramics. The haunting puzzle of intrinsic brittleness and low damage tolerance are resolved fundamentally. Under the protection of PyC interface layer, the carbon fibers around oxide layer and matrix remain structure intact after static oxidation at 1500 °C for 30 min. The oxide layer has reliable physical and chemical stability and resists the erosion from fierce oxidizing atmosphere, ensuring the excellent oxidation resistance of the composites. In a sense, the present work provides promising universality in designability and achievement of 3D carbon fiber reinforced ceramic composites.

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Section: Introduction mentioning

confidence: 99%

Using PyC modified 3D carbon fiber to reinforce UHTC under low temperature sintering without pressure

Cheng

Xun

et al. 2021

J Adv Ceram

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“…[28][29][30] Dislocation walls might have linked together to form subgrains. [31][32][33] This result could be associated with the misorientation results of EBSD.…”

Section: Resultsmentioning

confidence: 70%

Full densification of zirconium carbide ceramics sintered under high pressure at low temperature

Zou

et al. 2021

Int J Applied Ceramic Tech

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Zirconium carbide (ZrC) ceramic is one of the most important and promising materials with a high melting point. However, its low diffusion coefficient affects its densification behavior, which dramatically limits its engineering application. For polycrystal ceramic materials, sintering by thermal diffusion is the most widely used method for consolidation. But in view of the difficult densification behavior of ZrC, it is necessary to develop new sintering methods together with another driving force. In the study, we reported an ultra-high-pressure sintering strategy to fully densify ZrC ceramic under 1.7 GPa at 1600°C. The sintered sample exhibited high density, fine grain size, excellent mechanical properties, and a large number of crystal defects, including dislocation networks and walls, which were similar to those in deformed metals. Its hardness increased to 2057.44 HV0.1 because of its unique microstructure.

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“…Advanced SiC-based ceramic matrix composites (CMCs), such as carbon fiber reinforced SiC (C f /SiC) and SiC fiber reinforced SiC (SiC f /SiC), have recently attracted increasing attention for aerospace and nuclear applications [1][2][3][4]. These materials possess superior high-temperature physical properties, oxidation resistance, low density, and excellent mechanical properties [5][6][7]. However, their manufacturing as large components with complex shapes is extremely difficult.…”

Section: Introductionmentioning

confidence: 99%

Near-seamless joining of Cf/SiC composites using Y3Si2C2 via electric field-assisted sintering technique

Teng

Zhou

et al. 2022

J Adv Ceram

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A novel Y3Si2C2 material was synthesized at a relatively low temperature (900 °C) using a molten salt method for the first time, and subsequently used as the joining material for carbon fiber reinforced SiC (Cf/SiC) composites. The sound near-seamless joints with no obvious remaining interlayer were obtained at 1600 °C using an electric field-assisted sintering technique (FAST). During joining, a liquid phase was formed by the eutectic reaction among Y3Si2C2, γ(Y—C) phase, and SiC, followed by the precipitation of SiC particles. The presence of the liquid promoted the sintering of newly formed SiC particles, leading to their complete consolidation with the Cf/SiC matrix. On the other hand, the excess of the liquid was pushed away from the joining area under the effect of a uniaxial pressure of 30 MPa, leading to the formation of the near-seamless joints. The highest shear strength (τ) of 17.2±2.9 MPa was obtained after being joined at 1600 °C for 10 min. The failure of the joints occurred in the Cf/SiC matrix, indicating that the interface was stronger than that of the Cf/SiC matrix. The formation of a near-seamless joint minimizes the mismatch of thermal expansion coefficients and also irradiation-induced swelling, suggesting that the proposed joining strategy can be potentially applied to SiC-based ceramic matrix composites (CMCs) for extreme environmental applications.

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Fabrication and mechanical properties of self-toughening ZrB2–SiC composites from in-situ reaction

Cited by 53 publications

References 33 publications

Using PyC modified 3D carbon fiber to reinforce UHTC under low temperature sintering without pressure

Using PyC modified 3D carbon fiber to reinforce UHTC under low temperature sintering without pressure

Full densification of zirconium carbide ceramics sintered under high pressure at low temperature

Near-seamless joining of Cf/SiC composites using Y3Si2C2 via electric field-assisted sintering technique

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