Advances in Sintering Technologies for SiC Ceramics: Mechanisms, Challenges, and Industrial Applications

Abstract

Silicon carbide (SiC) ceramics have become critical materials for high-temperature engineering applications because of their exceptional mechanical strength, thermal conductivity, and chemical stability. In order to meet the diverse needs of industrial applications, various sintering methods have been developed. These include traditional methods such as pressureless sintering, reaction-bonded sintering, hot pressing, and recrystallization, as well as advanced technologies like spark plasma sintering, oscillatory pressure sintering, and flash sintering. This review provides a systematic analysis of both traditional and advanced sintering techniques for SiC ceramics. It highlights their mechanisms, critical process parameters, and impacts on the final material properties. Key challenges, including high sintering temperatures, additive selection, microstructural control, and scalability, are examined. Strategies for balancing cost-efficiency with performance are also discussed. In addition, recent advancements in SiC-based composite materials for applications ranging from aerospace components to catalytic filtration systems are presented. Finally, future research directions are proposed. These focus on precise additive engineering, microstructure tailoring, and innovative sintering methodologies to speed up the transition of high-performance SiC ceramics from laboratory prototypes to large-scale industrial implementation.

Keywords

Silicon carbide (SiC) / Sintering / Microstructure / Properties / High-temperature applications

Acknowledgments

The authors acknowledge the State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology for the support in the writing of this manuscript. The authors also would like to express their gratitude to Science X (Hubei) Novel Material Technology Co., Ltd. for the data they provided.

Author Contributions

Conceptualization, Y.C., C.Y., R.W. and J.H.; Investigation, Y.C., X.C. and C.D.; Data Curation, Y.C., J.D., B.M. and C.T.; Writing—Original Draft Preparation, Y.C., C.Y. and Z.L.; Writing—Review & Editing, Y.C. and C.Y.; Visualization, Y.C. and H.Z.; Project Administration, X.C. and C.Y.; Funding Acquisition, C.D. and C.Y.

Ethics Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author, upon reasonable request.

Funding

Authors acknowledge the financial support from the National Natural Science Foundation of China (U21A2057 and 52402034), the Key Research and Development Program of Hubei Province (2023BAB106), the Natural Science Foundation of Wuhan (2024040701010051), and the Science and Technology Innovation Team Foundation of Hubei Province (T2023001).

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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