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Research Article | Open Access

Additive manufacturing of hydroxyapatite bioceramic scaffolds: Dispersion, digital light processing, sintering, mechanical properties, and biocompatibility

Chengwei FENGa, Keqiang ZHANGa, Rujie HEa( ), Guojiao DINGa, Min XIAb, Xinxin JINc, Chen XIEd( )
Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China
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Abstract

Hydroxyapatite (HA) bioceramic scaffolds were fabricated by using digital light processing (DLP) based additive manufacturing. Key issues on the HA bioceramic scaffolds, including dispersion, DLP fabrication, sintering, mechanical properties, and biocompatibility were discussed in detail. Firstly, the effects of dispersant dosage, solid loading, and sintering temperature were studied. The optimal dispersant dosage, solid loading, and sintering temperature were 2 wt%, 50 vol%, and 1250 ℃, respectively. Then, the mechanical properties and biocompatibility of the HA bioceramic scaffolds were investigated. The DLP-prepared porous HA bioceramic scaffold was found to exhibit excellent mechanical properties and degradation behavior. From this study, DLP technique shows good potential for manufacturing HA bioceramic scaffolds.

Keywords

additive manufacturingdigital light processingvat photopolymerizationhydroxyapatitebioceramic scaffold

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Journal of Advanced Ceramics
Volume 9 Issue 3,
June 2020
Pages 360-373
DOI: 10.1007/s40145-020-0375-8
Cite this article:
FENG C, ZHANG K, HE R, et al. Additive manufacturing of hydroxyapatite bioceramic scaffolds: Dispersion, digital light processing, sintering, mechanical properties, and biocompatibility. Journal of Advanced Ceramics, 2020, 9(3): 360-373. https://doi.org/10.1007/s40145-020-0375-8

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Received: 21 October 2019
Revised: 03 February 2020
Accepted: 18 March 2020
Published: 05 June 2020
© The Author(s) 2020

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