In-situ formation of titanium carbide in carbon-rich silicon oxycarbide ceramic for enhanced thermal stability

Sun, Xiaoliang; Yang, Gang; Tian, Zhengkai; Zhu, Wenxia; Su, Dong

doi:10.1016/j.jeurceramsoc.2022.08.027

Cited by 9 publications

(4 citation statements)

References 42 publications

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“…Recently, we have introduced the Ti element into a carbonrich SiOC to form a TiC/SiOC nanocomposite, in which the in situ formed TiC phase can significantly enhance the crystallization resistance and thermal stability of the pristine SiOC ceramic up to 1500 °C. 36 The Ti element is preferred for the lower formation temperature (1286 °C) of the TiC phase than ZrC or HfC phases (>1600 °C) as well as the SiC phase (1521 °C). Inspired by our previous success, we herein incorporated a TiCN phase into a SiBCN ceramic aerogel using a tetrabutyl titanate (TBT)-modified PBSZ precursor for enhancing the high-temperature resistance of the aerogel.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we have introduced the Ti element into a carbon-rich SiOC to form a TiC/SiOC nanocomposite, in which the in situ formed TiC phase can significantly enhance the crystallization resistance and thermal stability of the pristine SiOC ceramic up to 1500 °C . The Ti element is preferred for the lower formation temperature (1286 °C) of the TiC phase than ZrC or HfC phases (>1600 °C) as well as the SiC phase (1521 °C).…”

Section: Introductionmentioning

confidence: 99%

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In Situ Formation of the TiCN Phase in SiBCN Ceramic Aerogels Enabling Superior Thermal and Structural Stability up to 1800 °C

Sun

Zhu

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Ceramic aerogels show excellent thermal insulation and functional performance for their unique nanoporous structure. However, conventional ceramic aerogels often undergo structural collapse and performance deterioration in high-temperature environments due to sintering, crystallization, and/or phase transition. Here, we designed a TiCN/SiBCN ceramic aerogel in which the TiCN phase was in situ formed through a carbothermal reaction during pyrolysis. Benefiting from its unique pearl-necklace-like structure, the TiCN/SiBCN aerogel exhibits a high specific surface area (248 m2/g), a low thermal conductivity (0.08 W/m·K), and a considerable compressive strength (2.2 MPa). The formation of a stable TiCN phase endows the aerogel with significant resistance to thermal decomposition and crystallization up to 1800 °C. Moreover, the TiCN/SiBCN aerogel retains high surface area and low thermal conductivity after thermal treatment, indicative of the stability and reliability of the nanoporous structure. The TiCN/SiBCN ceramic aerogel with superior thermal and structural stability is an ideal candidate for structural and functional applications in high-temperature environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Formation of the TiCN Phase in SiBCN Ceramic Aerogels Enabling Superior Thermal and Structural Stability up to 1800 °C

Sun

Zhu

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…In recent times, a diverse range of modifications to titanium carbide compounds has been extensively utilized across multiple sectors of modern technological devices [1][2][3][4][5][6][7]. The exceptional physical properties and elevated temperature resilience inherent in these compounds have propelled the broadening of their applications [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study of the entropy and enthalpy of gamma irradiated TiC nanoparticles

Hakhiyeva

2024

UNEC j. eng. appl. sci.

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The thermal characteristics of nanocrystalline titanium carbide (TiC) particles were systematically compared before and after gamma irradiation through the application of Differential Scanning Calorimetry (DSC) spectroscopy. Utilizing experimental findings, the Gibbs energy of titanium carbide nanoparticles was ascertained within the temperature range spanning from 300 to 1270 K. The investigation of potential phase transitions in nanoparticles and the amorphization processes induced by gamma radiation was investigated employing the Differential Thermal Analysis (DTA) methodology. The enthalpy and entropy of the system comprising nanocrystalline 3C-SiC particles were computed both before and after exposure to gamma irradiation, with theoretical calculations corroborated through comparison with experimental outcomes. The values derived from experimental results for all thermophysical parameters were compared both before and after exposure to gamma radiation.

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“…[1-5]. The constituent phase of silicon oxycarbide (SiOC) along with TiC serve as a high temperature composite [3]. The TiCN/SiBCN nanocomposite has also reported to possess a nano porous structure, which has high temperature ceramic aerogel having high surface area and low conductivity [4].…”

Section: Introductionmentioning

confidence: 99%

Localized carbon concentration gradients affecting nanocrystalline growth in Si-C-N films

Bhattacharyya,

Kritivardhan

2024

Preprint

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In-situ formation of titanium carbide in carbon-rich silicon oxycarbide ceramic for enhanced thermal stability

Cited by 9 publications

References 42 publications

In Situ Formation of the TiCN Phase in SiBCN Ceramic Aerogels Enabling Superior Thermal and Structural Stability up to 1800 °C

In Situ Formation of the TiCN Phase in SiBCN Ceramic Aerogels Enabling Superior Thermal and Structural Stability up to 1800 °C

Study of the entropy and enthalpy of gamma irradiated TiC nanoparticles

Localized carbon concentration gradients affecting nanocrystalline growth in Si-C-N films

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