Cross-scale microstructure design of precursor-derived SiC-AlN nanoceramic composites hybrid with ex-situ ZrB2

Xia, Aidong; Zhang, Buhao; Yin, Jie; Chen, Xiao; Lee, Sea‐Hoon; Liu, Xuejian; Huang, Zhengren

doi:10.1016/j.apmate.2022.100063

Cited by 3 publications

(3 citation statements)

References 58 publications

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“…In recent years, amorphous ceramics such as SiCN, SiBN, and SiBNC prepared from organosilicon polymer precursors have attracted extensive attention due to their noteworthier high‐temperature stability and good oxidation resistance. Reports show that SiBNC ceramics remain distinctly stable at temperatures as high as 2000°C, which presents prized application prospects 1–12 . However, the properties of polymer‐derived SiBNC ceramics deteriorate after exposure to 1500°C for more than 24 h. The originally amorphous oxide layer crystallizes, and there is a generation of bubbles (presumed to result from the volatilization of B 2 O 3 formed during oxidation).…”

Section: Introductionmentioning

confidence: 99%

“…Reports show that SiBNC ceramics remain distinctly stable at temperatures as high as 2000 • C, which presents prized application prospects. [1][2][3][4][5][6][7][8][9][10][11][12] However, the properties of polymer-derived SiBNC ceramics deteriorate after exposure to 1500 • C for more than 24 h. The originally amorphous oxide layer crystallizes, and there is a generation of bubbles (presumed to result from the volatilization of B 2 O 3 formed during oxidation). A similar phenomenon was observed during the high-temperature oxidation of bulk SiC with boron as a sintering aid.…”

Section: Introductionmentioning

confidence: 99%

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Effects of hafnium sources and hafnium content on the structures and properties of SiBNC–Hf ceramic precursors

et al. 2023

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The synthesis of SiBNC–M (M is metal element) multinary ceramic precursors has mainly been through chemical modification of the SiBNC ceramic precursors with the introduction of the metal element/compound. This misses the simplicity, efficiency, and combined benefits of single reactor synthesis routes. We herein adopt a one‐pot method to synthesize SiBNC–Hf ceramic precursors (PBSHZ) from different Hf sources, and with varying Hf content. The starting materials include hafnium tetrachloride, hafnium dichloride, trichlorosilane, hexamethyldisilazane, and boron trichloride. Fourier transform infrared spectroscopy (FT‐IR), nuclear magnetic resonance (NMR), X‐ray photoelectron spectroscopy (XPS), and thermogravimetric analysis are employed to characterize the structures and properties of the PBSHZ. The results reveal the successful incorporation of Hf into the precursors. Compared to the hafnium tetrachloride source, the precursor synthesized from hafnium dichloride yields more ceramics and shows better solubility, due to fewer Hf–Cl bonds available for reaction. Meanwhile, there is a positive correlation between the rise in the Hf content of PBSHZ and the ceramic yield. However, the solubility and processability of the precursors decline, due to the multiplication of the cross‐linking degree in the molecular structure. Further FT‐IR, NMR, XPS, and thermogravimetry–mass spectrometry (TG–MS) analysis indicate a full polymer‐to‐ceramic transformation at 1000°C pyrolysis temperature. At this point, the SiBNC–Hf ceramics mainly consist of an Si–B–N skeleton, HfN, and free carbon.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of hafnium sources and hafnium content on the structures and properties of SiBNC–Hf ceramic precursors

et al. 2023

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“…SiC materials are widely used in high temperature industry due to their high mechanical strength, low coefficient of thermal expansion, and excellent oxidation resistance. [1][2][3][4] However, SiC materials are still able to react with the oxidizing agent (O 2 , H 2 O, CO 2 , etc.) under high-temperature and form an SiO 2 oxide scale.…”

Section: Introductionmentioning

confidence: 99%

Degradation mechanism of near stoichiometric SiC fibers after air and Ar–H₂O–O₂corrosion at 1000–1500°C

Wang

et al. 2023

J Am Ceram Soc.

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The near stoichiometric SiC fiber has been reported to play significant roles in the application of aeroengine field. An in‐depth understanding on the degradation mechanism of the fiber during its corrosion in air and under a simulated aeroengine environment (PH2O:PO2:PAr = 14:8:78 kPa) will shine a light on the performance evaluations of the near stoichiometric SiC fiber‐based materials as well as the development of their potential applications. In this study, X‐ray diffraction, scanning electron microscope, and FIB‐TEM were utilized to analyze the mechanical properties and microstructure of the fiber. After oxidation in dry air and Ar–H2O–O2 for 1 h, respectively, the fiber strength retention rate has been found to decrease with the increased oxidation temperature. The raise in oxidation temperature also led to the increase of the thickness and the crystallization rate of the oxide scale. The most different oxidation behaviors of SiC being treated under the simulated environment than in air are the lower oxidation activation energy and the higher crystallization activation energy for cristobalite. Water vapor can promote the oxidation reaction and inhibit the crystallization of cristobalite in the oxide scale. Few significant differences have been observed otherwise in the oxidation process and oxidation chromatography crystallization mechanism of fibers being treated under different conditions. The increase of oxide layer thickness and the formation of cristobalite impair the structural integrity and compactness of the oxide scale and thus lead to the deterioration of the mechanical properties of SiC fibers. Therefore, it is proposed that oxidation resistance of SiC fiber can be improved by insulating the reaction between the oxidizing agents and the SiC fiber or by increasing the crystallization temperature of cristobalite in the oxidation process and reducing the crystallization rate.

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Antioxidant performance and oxidation mechanism of a liquid silicon infiltration (LSI) SiC–Si coating at an ultra-high temperature of 1873 K

Liu

Zhang

et al. 2023

Ceramics International

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Cross-scale microstructure design of precursor-derived SiC-AlN nanoceramic composites hybrid with ex-situ ZrB2

Cited by 3 publications

References 58 publications

Effects of hafnium sources and hafnium content on the structures and properties of SiBNC–Hf ceramic precursors

Effects of hafnium sources and hafnium content on the structures and properties of SiBNC–Hf ceramic precursors

Degradation mechanism of near stoichiometric SiC fibers after air and Ar–H₂O–O₂corrosion at 1000–1500°C

Antioxidant performance and oxidation mechanism of a liquid silicon infiltration (LSI) SiC–Si coating at an ultra-high temperature of 1873 K

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Cross-scale microstructure design of precursor-derived SiC-AlN nanoceramic composites hybrid with ex-situ ZrB2

Cited by 3 publications

References 58 publications

Effects of hafnium sources and hafnium content on the structures and properties of SiBNC–Hf ceramic precursors

Effects of hafnium sources and hafnium content on the structures and properties of SiBNC–Hf ceramic precursors

Degradation mechanism of near stoichiometric SiC fibers after air and Ar–H2O–O2corrosion at 1000–1500°C

Antioxidant performance and oxidation mechanism of a liquid silicon infiltration (LSI) SiC–Si coating at an ultra-high temperature of 1873 K

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Product

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Degradation mechanism of near stoichiometric SiC fibers after air and Ar–H₂O–O₂corrosion at 1000–1500°C