Insights into morphology and mechanical properties of architected interpenetrating aluminum-alumina composites

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES
Carlos Matos, Simão Santos, Isabel Duarte, Susana M Olhero, Georgina Miranda
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引用次数: 0

Abstract

Additive manufacturing (AM) technologies are unleashing the restrictions imposed by conventional manufacturing, allowing the production of innovative designs tailored to improve properties or performance. AM techniques in ceramic production allow the application of novel designs to ceramic parts, opening new opportunities for combining technologies aiming to obtain architected interpenetrating phase composites (IPCs). In this study, alumina structures with different architectures and Computer Aided Design (CAD) structure porosity oriented unidirectionally or bidirectionally, were fabricated by vat photopolymerization technique, namely Digital Light Processing. Afterwards, these structures were infiltrated with an aluminum alloy through investment casting, thus obtaining aluminum-alumina IPCs. Under compression, the IPCs presented a ductile behavior, conversely to the fragile ceramic counterparts. The IPCs compressive strength and absorbed energy were expressively higher than their ceramic counterparts. Comparing the bidirectional IPCs with the unidirectional ones, a significant increase in compressive strength and absorbed energy was observed, from 36.2% to 42.3% and from 164.8% to 358.1%, respectively, due to the greater amount and interconnection of the metal inside the ceramic structure. This study demonstrates the feasibility of this manufacturing route, combining two distinctive technologies, for the fabrication of metal-ceramic architected IPCs, allowing to tailor their mechanical properties and energy absorption capacity for a given application.
深入了解构架互穿氧化铝复合材料的形态和机械性能
快速成型制造(AM)技术正在打破传统制造工艺的限制,允许生产为改善特性或性能而量身定制的创新设计。陶瓷生产中的快速成型技术允许将新颖的设计应用于陶瓷部件,为旨在获得结构互穿相复合材料(IPC)的技术组合带来了新的机遇。在这项研究中,采用大桶光聚合技术,即数字光处理技术,制造了具有不同结构和计算机辅助设计(CAD)结构孔隙率的单向或双向定向氧化铝结构。然后,通过熔模铸造将铝合金渗入这些结构,从而获得铝氧化铝 IPC。在压缩条件下,IPC 具有韧性,这与易碎的陶瓷材料截然不同。IPC 的抗压强度和吸收能量都明显高于陶瓷。双向 IPC 与单向 IPC 相比,抗压强度和吸收能量都有显著提高,分别从 36.2% 提高到 42.3%,从 164.8% 提高到 358.1%,这是因为陶瓷结构内部的金属量更大,相互连接更紧密。这项研究证明了这一制造工艺的可行性,它结合了两种独特的技术,可用于制造金属陶瓷结构的 IPC,从而针对特定应用定制其机械性能和能量吸收能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Composite Materials
Journal of Composite Materials 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.90%
发文量
274
审稿时长
6.8 months
期刊介绍: Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).
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