Preparation of porous Si3N4 ceramics with varied macropore structures by direct ink writing

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-09-19 DOI:10.1016/j.ceramint.2024.09.244

Yi-ling Dai , Dong-xu Yao , Yong-feng Xia , Ming Zhu , Jun Zhao , Feng Wang , Yu-Ping Zeng

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Abstract

For biomaterials, the macropore structure directly impacts both its mechanical properties and various biological effects. The Direct Ink Writing (DIW) technique offers precise control over pore structure during the preparation of porous silicon nitride (Si₃N₄) ceramics, an undervalued yet excellent bioceramic material. In this study, a novel aqueous Si₃N₄ paste with a solid content of 44.59 vol% was proposed, notable for its remarkable shape retention. Through adjustments in printing parameters, a series of porous Si₃N₄ ceramics with varying macropore sizes are successfully fabricated, exhibiting relative densities ranging from 45.72 % to 82.99 % and flexural strengths from 79.8 ± 13.5 MPa to 492.6 ± 75.2 MPa. Three macropore shapes were further designed by adjusting the printing angle. Results indicated the strength of parallelogram pores is ∼32 % higher than squares and∼45 % higher than triangles, consistent with the predicted changes in relative density through calculation.

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用直接墨水写入法制备具有不同大孔结构的多孔 Si3N4 陶瓷

对于生物材料而言，大孔结构直接影响其机械性能和各种生物效应。在制备多孔氮化硅（Si3N4）陶瓷的过程中，直接油墨写入（DIW）技术可对孔隙结构进行精确控制。本研究提出了一种新型水性 Si3N4 浆料，其固含量为 44.59 Vol%，具有显著的形状保持性。通过调整印刷参数，成功制备出一系列具有不同大孔尺寸的多孔 Si3N4 陶瓷，其相对密度从 45.72% 到 82.99%，抗弯强度从 79.8 ± 13.5 MPa 到 492.6 ± 75.2 MPa。通过调整印刷角度，进一步设计了三种大孔形状。结果表明，平行四边形孔隙的强度比正方形孔隙高∼32%，比三角形孔隙高∼45%，与通过计算预测的相对密度变化一致。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.