Performance optimization of Si/SiC ceramic triply periodic minimal surface structures via laser powder bed fusion

IF 3.5 3区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of the American Ceramic Society Pub Date : 2023-08-16 DOI:10.1111/jace.19397
Siqi Wu, Lei Yang, Peng Chen, Changshun Wang, Zhaoqing Li, Chunze Yan, Yusheng Shi
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Abstract

SiC ceramic lattice structures (CLSs) via additive manufacturing (AM) have been recognized as potential candidates in engineering fields owing to their various merits. Compared with traditional SiC CLSs, SiC triply periodic minimal surface (TPMS) CLSs could possess more outstanding properties, making them more promising for wider applications. Since SiC CLSs are hard to be fabricated through stereolithography techniques because of inferior light performance, the laser powder bed fusion (LPBF) process via selective sintering is an effective method to prepare near-net-shaped SiC TPMS lattices. As the mechanical performances of lattice structures are the foundation for future practical applications, it is of great significance to optimize the preparation process, thus improving the mechanical properties of SiC TPMS structures. In this work, the optimal printing parameters of the LPBF and liquid silicon infiltration process for SiC ceramic TPMS CLSs with three different volume fractions were systematically illustrated and analyzed. The effects of the printing parameters and carbon densities on the fabrication accuracy, microstructure, and mechanical performance of SiC TPMS CLSs were defined. The mechanism of the reactive sintering process for the SiC TPMS lattice structure was revealed. The results reveal that Si/SiC TPMS CLSs with optimum preparation have superior manufacturing accuracy (most less than 6%), relatively high bulk densities (about 2.75 g/cm3), low residual Si content (6.01%), and excellent mechanical properties (5.67, 15.4, and 44.0 MPa for Si/SiC TPMS CLSs with 25%, 40%, and 55% volume fractions, respectively).

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激光粉末床熔覆Si/SiC陶瓷三周期最小表面结构的性能优化
通过增材制造(AM)的SiC陶瓷晶格结构(CLSs)由于其各种优点而被认为是工程领域的潜在候选者。与传统的SiC CLSs相比,SiC三周期最小表面CLSs具有更优异的性能,具有更广泛的应用前景。由于SiC CLS的光性能较差,难以通过立体光刻技术制备,因此通过选择性烧结的激光粉末床融合(LPBF)工艺是制备近净形状SiC TPMS晶格的有效方法。由于晶格结构的力学性能是未来实际应用的基础,因此优化制备工艺,从而提高SiC TPMS结构的力学性质具有重要意义。本文系统地阐述和分析了三种不同体积分数的SiC陶瓷TPMS CLS的LPBF和液态硅渗透工艺的最佳印刷参数。定义了印刷参数和碳密度对SiC TPMS CLS的制造精度、微观结构和力学性能的影响。揭示了SiC-TPMS晶格结构的反应烧结过程的机理。结果表明,采用最佳制备的Si/SiC TPMS CLS具有优异的制造精度(最多小于6%)、相对较高的堆积密度(约2.75g/cm3)、较低的残余硅含量(6.01%)和优异的机械性能(体积分数分别为25%、40%和55%的Si/SiC-TMPMS CLS分别为5.67、15.4和44.0MPa)。
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来源期刊
Journal of the American Ceramic Society
Journal of the American Ceramic Society 工程技术-材料科学:硅酸盐
CiteScore
7.50
自引率
7.70%
发文量
590
审稿时长
2.1 months
期刊介绍: The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.
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