An efficient and low-cost liquid silicon infiltration method to prepare SiC-coated carbon short fiber for fiber protection of Cf/SiC ceramic matrix composites

Tang, Jie; Meng, Liang; Wei, Yuquan; Yang, Yong; Huang, Zhengren

doi:10.1016/j.ceramint.2021.01.115

Cited by 24 publications

(8 citation statements)

References 22 publications

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“…In this paper, a uniform and firm silicon carbide semiconductor ceramic layer was deposited on the surface of SG powder by chemical liquid-solid reaction between Si powder and SG powder. [22][23][24] Furthermore, polycarbosilane (PCS) precursor was impregnated into the SiC layer and subsequently pyrolyzed at a high temperature to densify the structure of the SiC layer. Afterward, the SiC-coated SG powders were used as fillers to prepare thermal conductive pads with the silicone rubber as a substrate.…”

Section: Introductionmentioning

confidence: 99%

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Huang

Tian

Kong

et al. 2023

J of Applied Polymer Sci

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As a potential thermal conductive filler, spherical graphite (SG) has high thermal conductivity, low density, and a good spherical shape structure.However, the poor electrical insulation of SG will seriously limit its application in highly integrated electronic device packaging. Herein, through a simple liquid-solid chemical reaction, the surface of the SG particle is firmly covered by a uniform silicon carbide (SiC) ceramic coating. Subsequently, a polycarbo-

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Section: Introductionmentioning

confidence: 99%

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Huang

Tian

Kong

et al. 2023

J of Applied Polymer Sci

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“…The graphite/SiC composites with high retained carbon content are indispensable for excellent self‐lubricating properties, high thermal stability, and thermal conductivity 1,8–10 . In order to retain higher carbon content of the composites after RMI process, several approaches have been employed for preventing the direct contact with liquid silicon or reducing the severity of reaction with silicon at high temperature 4,11–14 . Some researchers fabricated the pyrolytic carbon coating on the surface of inorganic material via chemical vapor deposition, 11 polymer coating pyrolysis, 4,12,14 or hydrothermal method 13 .…”

Section: Introductionmentioning

confidence: 99%

“…4,[11][12][13][14] Some researchers fabricated the pyrolytic carbon coating on the surface of inorganic material via chemical vapor deposition, 11 polymer coating pyrolysis, 4,12,14 or hydrothermal method. 13 In the RMI process, the carbon coating first reacts with liquid silicon and generates a SiC layer in situ, which could protect inorganic material from the interaction with molten silicon. 4,[11][12][13][14] The size of carbon particles in porous carbon preforms is also a key factor that influences the amount of the reaction-formed SiC, as a consequence, affects the amount of unreacted carbon content.…”

Section: Introductionmentioning

confidence: 99%

“…1,[8][9][10] In order to retain higher carbon content of the composites after RMI process, several approaches have been employed for preventing the direct contact with liquid silicon or reducing the severity of reaction with silicon at high temperature. 4,[11][12][13][14] Some researchers fabricated the pyrolytic carbon coating on the surface of inorganic material via chemical vapor deposition, 11 polymer coating pyrolysis, 4,12,14 or hydrothermal method. 13 In the RMI process, the carbon coating first reacts with liquid silicon and generates a SiC layer in situ, which could protect inorganic material from the interaction with molten silicon.…”

Section: Introductionmentioning

confidence: 99%

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A hybrid graphite powder PFC@G for reserving higher carbon content of self‐lubrication graphite/SiC composites by RMI

et al. 2023

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The appropriate carbon content is indispensable for the application of selflubricating graphite/SiC composites. However, it is a big challenge to retain high carbon content in the reaction-formed graphite/SiC composites because of drastic consumption of carbon by violent reaction with liquid silicon. In this study, a hybrid powder constructed by graphite particles (G) and glassy carbon derived from phenolic resin (PFC) was used as carbon sources, or PFC@G for short, to reserve higher content of carbon in the reaction-formed composites. The weight ratio of phenolic resin to graphite particles was adjusted to obtain an appropriate PFC@G with dense microstructure and close-grained surface. Compared with the graphite/SiC composites only using raw graphite particles as carbon sources, the carbon content of the composites fabricated with compact and large PFC@G has obviously increased (up to 172%). In particular, the carbon content of the composites fabricated with the weight ratio = 0.8 reached a high value of 44.26 vol.%, which exhibited outstanding self-lubrication properties among the four kinds of the composites. The mechanism of reserving higher content of carbon in the graphite/SiC composites by constructing PFC@G is investigated, revealing that a continuous SiC layer formed on the surface of the larger size PFC@G and most closely packed graphite particles inside of PFC@G were insulate from liquid silicon by the layer.

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“…Carbon fibers are often used as reinforcements to improve the performance of materials. [26,27] The reinforcements of traditional C f /SiC composites include chopped carbon fiber (CCF) and continuous carbon fibers. The 3D printing of continuous carbon fiber-reinforced SiC ceramics is mainly based on direct ink writing and extrusion, while the solid content limits accuracy and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Chopped Carbon Fiber on the Forming, Structure, and Mechanical Properties of CCF/SiC Composites Fabricated by Selective Laser Sintering and Reactive Melt Infiltration

et al. 2023

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Silicon carbide (SiC) composites are fabricated by selective laser sintering (SLS) combined with reactive melt infiltration (RMI) using SiC powder mixed with various contents (0–32 vol%) of chopped carbon fiber (CCF) as reinforcement phase and carbon source. The introduction of an appropriate amount of CCF can reduce the shrinkage and step effect caused by slicing, improving the forming quality of the CCF/SiC preforms after pyrolysis. Meanwhile, as a carbon resource, CCF can react with molten silicon to form the β‐SiC, improving the mechanical properties of CCF/SiC composites. The result shows that the CCF/SiC powder shows excellent fluidity, and the angle of repose of the CCF/SiC powder is 32–40° when the proportion of CCF is less than 24 vol%. CCF/SiC preforms shrinkage is lower than 1.74% and 1.94% along the nonadditive and additive manufacturing directions, respectively. Compared without CCF, the bending strength and fracture toughness of the CCF/SiC composites with 8 vol% CCF improve from 137.9 MPa and 2.69 MPa m1/2 to 177.1 MPa and 3.10 MPa m1/2, respectively. This study is believed to provide a new strategy for additive manufacturing of high‐performance CCF/SiC composites with high CCF content by SLS.

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An efficient and low-cost liquid silicon infiltration method to prepare SiC-coated carbon short fiber for fiber protection of Cf/SiC ceramic matrix composites

Cited by 24 publications

References 22 publications

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

A hybrid graphite powder PFC@G for reserving higher carbon content of self‐lubrication graphite/SiC composites by RMI

Effects of Chopped Carbon Fiber on the Forming, Structure, and Mechanical Properties of CCF/SiC Composites Fabricated by Selective Laser Sintering and Reactive Melt Infiltration

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