Szlancsik Attila, Katona Bálint, Kemény Alexandra, Károly Dóra
Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3., 1111 Budapest, Hungary.
MTA-BME Lendület Composite Metal Foams Research Group, Műegyetem rakpart 3., 1111 Budapest, Hungary.
Materials (Basel). 2019 Jun 24;12(12):2023. doi: 10.3390/ma12122023.
Metal matrix syntactic foams (MMSFs) are becoming increasingly relevant from the lightweight structural materials point of view. They are also used as energy absorbers and as core materials for sandwich structures. The mechanical properties of MMSFs are extensively influenced by the properties of their filler materials which are used to create and ensure the porosity inside the metal matrix. As the properties of fillers are of such importance in the case of MMSFs, in this paper three different filler materials: (i) ceramic hollow spheres (CHSs), (ii) metallic hollow spheres (MHSs) and (iii) lightweight expanded clay particles (LECAPs), have been investigated in numerous aspects. The investigations cover the microstructural features of the fillers and the basic mechanical properties of the fillers and the produced MMSFs as well. The microstructure was studied by optical and electron microscopy extended by energy-dispersive X-ray spectrometry, while the basic mechanical properties were mapped by standardized compression tests. It was found that in the terms of cost-awareness the LECAPs are the best fillers, because they are ~100 times cheaper than the CHSs or MHSs, but their mechanical properties can be compared to the aforementioned, relatively expensive filler materials and still exceed the properties of the most 'conventional' metallic foams.
从轻质结构材料的角度来看，金属基复合泡沫材料（MMSFs）正变得越来越重要。它们还被用作能量吸收器和夹层结构的芯材。MMSFs的力学性能受到其填充材料性能的广泛影响，这些填充材料用于在金属基体内部形成并确保孔隙率。由于填充材料的性能在MMSFs的情况下如此重要，本文对三种不同的填充材料进行了多方面研究：（i）陶瓷空心球（CHSs），（ii）金属空心球（MHSs）和（iii）轻质膨胀粘土颗粒（LECAPs）。研究涵盖了填充材料的微观结构特征以及填充材料和所制备的MMSFs的基本力学性能。通过光学显微镜和电子显微镜结合能量色散X射线光谱法研究微观结构，同时通过标准化压缩试验测定基本力学性能。结果发现，从成本意识角度来看，LECAPs是最佳填充材料，因为它们比CHSs或MHSs便宜约100倍，但其力学性能可与上述相对昂贵的填充材料相媲美，并且仍然超过了最“传统”金属泡沫的性能。
