Synergistic Enhancement Mechanism of Particle Gradation and Reactive Melt Infiltration on the Mechanical Properties of Sic Ceramics Via Vat Photopolymerization

30 Pages Posted: 18 Jan 2025

See all articles by JunChao He

JunChao He

Wuhan University of Technology

Ce Sun

Wuhan University of Technology

Jinyi Geng

Wuhan University of Technology

Huajun Sun

Wuhan University of Technology

Xiao Han

affiliation not provided to SSRN

Lixia Yang

Nanjing University of Aeronautics and Astronautics

Xiaolong Gong

Wuhan University of Technology

Kai Liu

Wuhan University of Technology

Yusheng Shi

Huazhong University of Science and Technology - State Key Laboratory of Material Processing and Die & Mould Technology

Abstract

Vat photopolymerization (VPP) technology holds significant potential for fabricating high-precision SiC ceramic components with complex structures. However, SiC, as a covalently bonded compound, exhibits low sintering activity, which greatly limits the densification process and its mechanical property. In this paper, a new bimodal particle size SiC combined with reactive melt infiltration (RMI) for fabricating high-performance SiC ceramics is developed. The results shows that particle gradation slightly weakens the curing of SiC slurry but benefits the reactive infiltration process. The addition of fine particles (d50=3 μm) reduces residual silicon aggregation and promotes uniform β-SiC growth in silicon-rich regions during RMI process. As a result, the fracture mode of SiC transitions from purely intergranular fracture to a mixed mode of intergranular and transgranular fracture, significantly improving its mechanical properties. The final SiC ceramics achieve a bulk density of 2.996 g/cm3 and a maximum flexural strength of 401.33 MPa, which reflecting an approximate 86.32% improvement in strength. This method offers an effective solution for fabricating high-strength SiC ceramics with complex structures using VPP technology.

Keywords: Vat photopolymerization, SiC, Particle gradation, Reactive melt infiltration, mechanical properties

Suggested Citation

He, JunChao and Sun, Ce and Geng, Jinyi and Sun, Huajun and Han, Xiao and Yang, Lixia and Gong, Xiaolong and Liu, Kai and Shi, Yusheng, Synergistic Enhancement Mechanism of Particle Gradation and Reactive Melt Infiltration on the Mechanical Properties of Sic Ceramics Via Vat Photopolymerization. Available at SSRN: https://ssrn.com/abstract=5101558 or http://dx.doi.org/10.2139/ssrn.5101558

JunChao He

Wuhan University of Technology ( email )

Wuhan
China

Ce Sun

Wuhan University of Technology ( email )

Wuhan
China

Jinyi Geng

Wuhan University of Technology ( email )

Wuhan
China

Huajun Sun

Wuhan University of Technology ( email )

Wuhan
China

Xiao Han

affiliation not provided to SSRN ( email )

No Address Available

Lixia Yang

Nanjing University of Aeronautics and Astronautics ( email )

Yudao Street
210016
Nanjing,, 210016
China

Xiaolong Gong (Contact Author)

Wuhan University of Technology ( email )

Wuhan
China

Kai Liu

Wuhan University of Technology ( email )

Wuhan
China

Yusheng Shi

Huazhong University of Science and Technology - State Key Laboratory of Material Processing and Die & Mould Technology ( email )

Wuhan, Hubei, 430074
China

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