Anisotropic response of bidirectionally ice-templated alumina/epoxy composites

IF 1.8 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS
Sudhendu N. Tiwari, Vinay Kumar, Prabhat K. Agnihotri
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Abstract

This work investigates the anisotropic response of nacre-like lamellar alumina/epoxy composites at low and high strain rates. Ice-templated alumina with long-range aligned porous lamellar structures is fabricated at 20 vol% of ceramic part using bidirectional freeze casting method. The obtained porous structures are infiltrated with epoxy to fabricate lamellar alumina/epoxy composites. The compressive tests are performed on scaffolds and composites at different orientations relative to the freezing direction. The testing results reveal that infiltration has increased the uniaxial compressive strength of the scaffold substantially. The compressive properties are higher when loaded along the freezing direction, and it decreases when it is loaded away from the freezing direction. The strength of the composites exhibited a strong dependency on the loading direction and strain rates.

双向冰模板氧化铝/环氧复合材料的各向异性响应
本文研究了纳米片状氧化铝/环氧复合材料在低应变速率和高应变速率下的各向异性响应。采用双向冷冻铸造的方法,制备了具有长程排列多孔层状结构的冰模板氧化铝。将得到的多孔结构用环氧树脂渗透,制备层状氧化铝/环氧复合材料。在相对于冻结方向的不同方向上对支架和复合材料进行了压缩试验。试验结果表明,渗滤显著提高了支架的单轴抗压强度。沿冻结方向加载时压缩性能较高,远离冻结方向加载时压缩性能降低。复合材料的强度与加载方向和应变速率密切相关。
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来源期刊
International Journal of Applied Ceramic Technology
International Journal of Applied Ceramic Technology 工程技术-材料科学:硅酸盐
CiteScore
3.90
自引率
9.50%
发文量
280
审稿时长
4.5 months
期刊介绍: The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;
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