Numerical and Experimental Characterization of Elastic Properties of a Novel, Highly Homogeneous Interpenetrating Metal Ceramic Composite,Advanced Engineering Materials

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Numerical and Experimental Characterization of Elastic Properties of a Novel, Highly Homogeneous Interpenetrating Metal Ceramic Composite
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-05-04 , DOI: 10.1002/adem.201901556
Dominik Horny ₁ , Joél Schukraft ₂ , Kay André Weidenmann ₂ , Katrin Schulz ₁

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An interpenetrating aluminum–alumina composite is presented, based on a ceramic foam manufactured via a novel slurry-based route resulting in a highly homogeneous preform microstructure in contrast to other preform techniques. The metal matrix composite (MMC) is produced by infiltrating the open-porous ceramic preform with molten aluminum at 700 °C using a Argon-driven gas pressure infiltration process. The resulting MMC and the primary ceramic foam are investigated both numerically and experimentally in terms of microstructural characteristics. In addition, the mechanical behavior of the material as well as the structural and material interactions on the microscale are investigated. To characterize the MMC regarding mechanical isotropy, elastic properties are determined experimentally via ultrasonic phase spectroscopy (UPS). A fast Fourier transform (FFT) formulation is used to simulate the complex 3D microstructure with reasonable effort based on image-data gathered from highresolution X-ray computed tomography (CT) scans of the ceramic foam as computational grid. Simulations prove that the material properties are, indeed, considered as highly homogeneous with respect to the material microstructure. A comparison with effective experimental investigations confirms these findings.

中文翻译：

新型高度均匀互穿金属陶瓷复合材料弹性性能的数值和实验表征

介绍了一种互穿铝-氧化铝复合材料，它基于陶瓷泡沫，通过一种新型的基于浆料的路线制造，与其他预成型技术相比，可产生高度均匀的预成型微观结构。金属基复合材料 (MMC) 是通过使用氩气驱动的气压渗透工艺在 700°C 下用熔融铝渗透开孔陶瓷预制件来生产的。所得的 MMC 和初级陶瓷泡沫在微观结构特征方面进行了数值和实验研究。此外，研究了材料的机械行为以及微观尺度上的结构和材料相互作用。为了表征关于机械各向同性的 MMC，弹性特性通过超声相谱 (UPS) 实验确定。基于从陶瓷泡沫的高分辨率 X 射线计算机断层扫描 (CT) 扫描作为计算网格收集的图像数据，使用快速傅立叶变换 (FFT) 公式以合理的努力模拟复杂的 3D 微观结构。模拟证明，材料特性实际上被认为是高度均匀的材料微观结构。与有效的实验研究的比较证实了这些发现。

更新日期：2020-05-04

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