Green synthesis, formation mechanism and oxidation of Ti3SiC2 powder from bamboo charcoal, Ti and Si

Su, Kai; Tian, Xuekun; Li, Suping; Cui, Junyan; Liu, Xinhong; Song, Bo

doi:10.1016/j.ceramint.2023.05.179

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…The formation of SiC-TiC coatings is different to that of SiC-or TiC-coated graphite. As reported [25,26,28], TiC coating can be completely formed at 900 • C, and SiC coating can be completely formed at 1350 • C; however, no Si was detected at 1150-1250 • C in this work, which is due to Ti reacting with Si to form the TiSi 2 alloy [21,34,35]. These contribute to generating nanosized SiC-TiC coatings on graphite surfaces (Figures 4 and 5), thereby creating SiC-TiC@C powders which possess better performance compared to the as-received graphite flakes (in Figures 8 and 9).…”

Section: Discussionsupporting

confidence: 59%

“…Secondly, the formation of TiC via reacting of Ti and graphite is also facilitated by salt melts. Considering that Si disappears, TiSix is detected, which due to Si reacts with Ti to form the Ti-Si eutectic phase [21,34,35]. On raising the temperature to 1300 • C, TiSix can react with graphite to generate TiC and SiC via the template growth mechanism [21,22,25,26,28,29].…”

Section: Discussionmentioning

confidence: 99%

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Large-Scale Fabrication of SiC-TiC@C Powders via Modified Molten Salt Shielding Synthesis Technique and Their Effect on the Properties of Al2O3-MgO Castables

Li,

Yin,

Chen

et al. 2023

Materials

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Graphite flakes are commonly used to fabricate carbon-based refractories owing to their superior properties, including better corrosion resistance and thermal shock resistance (TSR); unfortunately, their insufficient water-wettability has remarkably hindered their application in castables. Aiming to enhance their water-wettability, a facile and low-cost technique for fabricating carbides coated in graphite was proposed in this work. Firstly, SiC-TiC coated graphite (SiC-TiC@C) powders were prepared via modified molten salt shielding synthesis in an air atmosphere using graphite flake, Si and Ti powders as raw materials and NaCl-KCl as the molten salt shielding medium. Water-wettability and oxidation resistance of SiC-TiC@C powders were significantly improved. Compared to the Al2O3-MgO castables with graphite flakes, the water demand of the castables with SiC-TiC@C was noticeably decreased from 6.85% to 4.89%, thereby decreasing the apparent porosity of the castables with 5% SiC-TiC@C (from 20.3% to 13%), enhancing the cold strength, hot strength and oxidation resistance of the castables. Such enhancements are ascribed to continuous and crack-free SiC-TiC coatings on graphite surfaces ensuring that the castables have outstanding properties.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Large-Scale Fabrication of SiC-TiC@C Powders via Modified Molten Salt Shielding Synthesis Technique and Their Effect on the Properties of Al2O3-MgO Castables

Li,

Yin,

Chen

et al. 2023

Materials

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show abstract

“…Therefore, the design and synthesis of a new generation of evaporators are inevitable. MAX phases are known for their machinability, strength, electrical conductivity, oxidation resistance, and high-temperature stability. − The chemical bonds in this material possess a mixed covalent–ionic-metallic nature, endowing it with the properties of ceramics and metals, which make it ideal for the application as the matrix materials for stable interfacial solar evaporation in the variable marine environment. Moreover, under conditions of insufficient sunlight, such as cloudy days or evenings, it is still a great challenge to ensure adequate steam generation. − Thus, building an evaporator that is available under any weather or increasing the evaporation rate through an additional power supply is of significant importance.…”

mentioning

confidence: 99%

In Situ MXene Anchored Structure for Highly Durable Solar Steam Generation

Yan,

Kong,

et al. 2024

Nano Lett.

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As a promising fresh water harvesting technology, interfacial solar steam generation has attracted growing interest. Efficient solar absorption and long-term operational performance are critical requirements of this technology. However, developing robust evaporators to promote practical applications under extreme conditions is still a grand challenge. Herein, we propose a light-assisted strategy to in situ prepare a Ti 3 C 2 T x MXene anchored structure (MXAS) for enhanced solar evaporation with superior mechanical properties (compressive strength of 78.47 MPa, which can withstand a pressure of 3.92 × 10 6 times its own weight). Light irradiation enlarges the interlayer spacing of MXene and improves the solar absorption capability. Under one sun, the threedimensional MXAS evaporator exhibits a steam generation rate of 2.48 kg m −2 h −1 and an evaporation efficiency of 89.3%, and it demonstrates long-term durability when testing in seawater. This strategy provides valuable insights into the potential application of a high-performance water evaporation system.

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High temperature oxidation resistance behavior of Ti3SiC2/Cu composites under migration of Ti and Cu atomic

Zhang,

Liu

et al. 2024

Ceramics International

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Green synthesis, formation mechanism and oxidation of Ti3SiC2 powder from bamboo charcoal, Ti and Si

Cited by 8 publications

References 44 publications

Large-Scale Fabrication of SiC-TiC@C Powders via Modified Molten Salt Shielding Synthesis Technique and Their Effect on the Properties of Al2O3-MgO Castables

Large-Scale Fabrication of SiC-TiC@C Powders via Modified Molten Salt Shielding Synthesis Technique and Their Effect on the Properties of Al2O3-MgO Castables

In Situ MXene Anchored Structure for Highly Durable Solar Steam Generation

High temperature oxidation resistance behavior of Ti3SiC2/Cu composites under migration of Ti and Cu atomic

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