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SiCN microsphere reinforced SiCN composite ceramics formed by DLP and their biotoxicity.

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Title: SiCN microsphere reinforced SiCN composite ceramics formed by DLP and their biotoxicity.
Authors: Zhang, Zhongya1 (AUTHOR), Zhong, Cheng2 (AUTHOR), Xue, Jing3 (AUTHOR), Zhang, Lijuan1,2 (AUTHOR) zhanglj@sdut.edu.cn
Source: Ceramics International. Mar2026, Vol. 52 Issue 8, p10180-10188. 9p.
Subjects: Ceramic-matrix composites, In vitro toxicity testing, Mechanical behavior of materials, Biomedical engineering, Three-dimensional printing, Deformations (Mechanics)
Abstract: To reduce shrinkage rate and enhance mechanical properties in SiCN composite ceramics fabricated via DLP 3D printing, SiCN microspheres prepared through emulsion-thermal curing were introduced as fillers. This study examines the effect of the pyrolysis process on the UV-curing performance of the microspheres within the slurry. Microspheres heat-treated at 600 °C were selected as the fillers. Increasing the SiCN microsphere content from 0 wt% to 30 wt% reduced the linear shrinkage from 31.8 ± 0.2 % to 26.2 ± 0.3 %. The flexural strength of the SiCN composite ceramics reached a maximum value of 242.1 ± 13.1 MPa at a microsphere content of 15 wt%. Furthermore, biotoxicity evaluation of the SiCN composite ceramics showed a relative cell viability of 95.8 ± 0.6 %, indicating exceptionally low biotoxicity. This work demonstrates the significant potential of photopolymerization-based additive manufacturing for producing complex ceramic components suitable for biomedical applications. This research demonstrates the significant potential of photopolymerization additive manufacturing technology for producing complex ceramic components for biomedical applications. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:To reduce shrinkage rate and enhance mechanical properties in SiCN composite ceramics fabricated via DLP 3D printing, SiCN microspheres prepared through emulsion-thermal curing were introduced as fillers. This study examines the effect of the pyrolysis process on the UV-curing performance of the microspheres within the slurry. Microspheres heat-treated at 600 °C were selected as the fillers. Increasing the SiCN microsphere content from 0 wt% to 30 wt% reduced the linear shrinkage from 31.8 ± 0.2 % to 26.2 ± 0.3 %. The flexural strength of the SiCN composite ceramics reached a maximum value of 242.1 ± 13.1 MPa at a microsphere content of 15 wt%. Furthermore, biotoxicity evaluation of the SiCN composite ceramics showed a relative cell viability of 95.8 ± 0.6 %, indicating exceptionally low biotoxicity. This work demonstrates the significant potential of photopolymerization-based additive manufacturing for producing complex ceramic components suitable for biomedical applications. This research demonstrates the significant potential of photopolymerization additive manufacturing technology for producing complex ceramic components for biomedical applications. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2026.01.194