Fabrication and characterization of SPS sintered SiC-based ceramic from Y3Si2C2-coated SiC powders

Shao, Junqi; Li, Mian; Chang, Keke; Zhang, Shuai; Ren, Donglou; Wang, Ji; Zhou, Xiaobing; He, Liu; Huang, Feng; Du, Shiyu; Sha, Jianjun; Huang, Zhengren; Huang, Qing

doi:10.1016/j.jeurceramsoc.2018.07.054

Cited by 33 publications

(24 citation statements)

References 37 publications

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“…As discussed in Ref. 14,17, when the molar ratio of Y:SiC decreased from 1:4 to 1:8, the mole fraction of the Y 3 Si 2 C 2 phase decreased from 25.9 to 13.7 at.%. As a result, the coating was completely covered on the surface of SiC particles with a thickness about 100 nm with the molar ratio 1:4.…”

Section: Discussionmentioning

confidence: 80%

“…Recently, Shao et al prepared the SiC‐Y 3 Si 2 C 2 core‐shell structure for sintering, in turn they obtained the fully densified SiC ceramics. In our previous work, We have obtained a thorough description of the Y‐Si‐C system to predict the thermal behavior of Y 3 Si 2 C 2 and explain the densification mechanism.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Shao et al 14 prepared the SiC-Y 3 Si 2 C 2 coreshell structure for sintering, in turn they obtained the fully F I G U R E 2 Calculated Pr-Si phase diagram together with thermodynamic properties: (A) Pr-Si phase diagram 19,47 ; (B) heat capacities of Pr 5 Si 3 , Pr 5 Si 4 , PrSi, α-Pr 5 Si 9 , and β-Pr 5 Si 9 by adiabatic calorimetry 28,51 ; (C) enthalpy increments (H T -H 298 ) of Pr 5 Si 3 , Pr 5 Si 4 , PrSi, and Pr 5 Si 9 by high-temperature calorimetry 34,35,47 ; (D) standard enthalpy of formation direct reaction calorimetry 34,35 and massspectrometry 37 ; (E) standard entropy by adiabatic calorimetry 28,51 densified SiC ceramics. In our previous work, 17 We have obtained a thorough description of the Y-Si-C system to predict the thermal behavior of Y 3 Si 2 C 2 and explain the densification mechanism.…”

Section: La (Ce Pr)-si-c Ternary Systemsmentioning

confidence: 99%

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Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Chang

Zhou

et al. 2020

J Am Ceram Soc

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The Y3Si2C2 coating on the silicon carbide (SiC) powders is reported to improve the sintering process, but the relatively high sintering temperature (1600°C) restricts the engineering application. A series of thermodynamic descriptions for the SiC with light rare‐earth elements are desired to develop potential SiC‐RE3Si2C2 core‐shell structures as sintering aids with lower temperatures. Coupling the CALPHAD (CALculation of PHAse Diagram) approach and first‐principles calculations, we have investigated the RE‐Si‐C (RE = La, Ce and Pr) systems. In the SiC‐RE3Si2C2 core‐shell structures, the RE3Si2C2 phases can react with SiC via ternary eutectic reactions at 810°C, 747°C, and 1148°C respectively. The predicted thermal behaviors of the Pr3Si2C2 phase were further confirmed by our key experiments. Therefore, our database can be used to predict promising sintering aids and guide the subsequent processes.

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Section: Discussionmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: La (Ce Pr)-si-c Ternary Systemsmentioning

confidence: 99%

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Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Chang

Zhou

et al. 2020

J Am Ceram Soc

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“…The SPS processing of SiC is a specific type of liquid phase sintering (LPS), where small amounts of oxide additives are added to SiC nanopowder as sintering additives . According to the previous reports on the preparation of LPS‐SiC ceramic, it can be concluded that LPS‐SiC is a complex material whose properties vary greatly depending on the sintering additives . Among various sintering additives, the Al 2 O 3 − Y 2 O 3 system is the most common sintering additive for the LPS of SiC ceramics .…”

Section: Introductionmentioning

confidence: 99%

“…9,10 According to the previous reports on the preparation of LPS-SiC ceramic, it can be concluded that LPS-SiC is a complex material whose properties vary greatly depending on the sintering additives. [11][12][13][14][15] Among various sintering additives, the Al 2 O 3 − Y 2 O 3 system is the most common sintering additive for the LPS of SiC ceramics. 16,17 Therefore, in this study, Al 2 For ultimate deployment of SiC-based materials as nuclear fuel or cladding, a number of engineering issues must be explored and quantified, including the corrosion behavior of SiC in hydrothermal environment (350°C/15 MPa).…”

Section: Introductionmentioning

confidence: 99%

Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives

Xie

Liu

et al. 2019

J Am Ceram Soc

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Fully dense SiC bulks with Al2O3 and Al2O3 + Y2O3 sintering additives were prepared by spark plasma sintering and the effect of sintering additives on the hydrothermal corrosion behavior of SiC bulks was investigated in the static autoclave at 400°C/10.3 MPa. The SiC specimen with Al2O3 sintering additive exhibited a higher weight loss and followed a linear law. However, the SiC specimen with Al2O3 + Y2O3 additive exhibited a lower weight loss and followed a parabolic law, indicating that the corrosion kinetic and mechanism were different for these two SiC bulks. Further examination revealed that, a deposited layer was formed on the surface of SiC specimen with Al2O3 + Y2O3 sintering additive after corrosion, which can effectively protect the SiC specimen from further corrosion, and thereby improved the corrosion resistance of the SiC specimen with Al2O3 + Y2O3 sintering additive.

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Multifunctional Yb₃Si₂C₂ with High‐Performance Terahertz Shielding for Future 6G Communications

Qiu,

Zhou,

Huang

et al. 2024

Adv Funct Materials

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The development of next‐generation 6G communications is anticipated to expand into extreme environments, necessitating superior terahertz (THz) electromagnetic interference (EMI) shielding materials. Herein, structural stability, electronic and optical properties of rare earth silicide carbide Yb3Si2C2 are investigated using first principles density functional calculations and semi‐classical Boltzmann transport theory. The calculation results show Yb3Si2C2 is determined to be experimentally synthesized with high temperature stability with a certain fluctuating C2 pair orientation. In addition, Yb3Si2C2 is identified as a soft, tough, and damage‐resistant ceramic with low shear deformation resistance and easy cleavage, ensuring its durability in irradiation environments. Due to the layered structure and excellent electrical conductivity, Yb3Si2C2 demonstrates high reflectivity and low transmittance for terahertz electromagnetic waves, along with 62% solar absorptivity and 33% IR emissivity. Remarkably, the total shielding effectiveness of Yb3Si2C2 with thicknesses of 5 µm and above follows the widely‐used Simon's formula. The average total shielding effectiveness of 5 µm‐thick and 10 µm‐thick Yb3Si2C2 across the entire THz region reaches 63 and 110 dB, respectively, which turns out to be the top compared to the results reported. Therefore, the multifunctional intrinsic properties of Yb3Si2C2 materials hold great promise for miniaturized, high‐performance terahertz EMI shielding, even in extreme environments.

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Fabrication and characterization of SPS sintered SiC-based ceramic from Y3Si2C2-coated SiC powders

Cited by 33 publications

References 37 publications

Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives

Multifunctional Yb₃Si₂C₂ with High‐Performance Terahertz Shielding for Future 6G Communications

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Fabrication and characterization of SPS sintered SiC-based ceramic from Y3Si2C2-coated SiC powders

Cited by 33 publications

References 37 publications

Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Comparison of hydrothermal corrosion behavior of SiC with Al2O3 and Al2O3 + Y2O3 sintering additives

Multifunctional Yb3Si2C2 with High‐Performance Terahertz Shielding for Future 6G Communications

Contact Info

Product

Resources

About

Comparison of hydrothermal corrosion behavior of SiC with Al₂O₃ and Al₂O₃ + Y₂O₃ sintering additives

Multifunctional Yb₃Si₂C₂ with High‐Performance Terahertz Shielding for Future 6G Communications