Kremzer Marek, Tomiczek Błażej, Matula Grzegorz, Gocki Michał, Krzemiński Łukasz
Scientific and Didactic Laboratory of Nanotechnology and Material Technologies, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18a St., 44-100 Gliwice, Poland.
Materials (Basel). 2023 Aug 4;16(15):5473. doi: 10.3390/ma16155473.
This article employed the fused deposition modelling (FDM) method and gas-pressure infiltration to manufacture alumina/AlSi12 composites. Porous ceramic skeletons were prepared by FDM 3D printing of two different alumina powder-filed filaments. The organic component was removed using a combination of solvent and heat debinding, and the materials were then sintered at 1500 °C to complete the process. Thermogravimetric tests and DTA analysis were performed to develop an appropriate degradation and sintering program. Manufactured skeletons were subjected to microstructure analysis, porosity analysis, and bending test. The sintering process produced porous alumina ceramic samples with no residual carbon content. Open porosity could occur due to the binder's degradation. Liquid metal was infiltrated into the ceramic, efficiently filling any open pores and forming a three-dimensional network of the aluminium phase. The microstructure and characteristics of the fabricated materials were investigated using high-resolution scanning electron microscopy, computer tomography, hardness testing, and bending strength testing. The developed composite materials are characterized by the required structure-low porosity and homogenous distribution of the reinforcing phase, better mechanical properties than their matrix and more than twice as high hardness. Hence, the developed innovative technology of their manufacturing can be used in practice.
本文采用熔融沉积成型（FDM）方法和气压浸渗法制备氧化铝/AlSi12复合材料。通过对两种不同的填充氧化铝粉末的长丝进行FDM 3D打印来制备多孔陶瓷骨架。采用溶剂脱脂和热脱脂相结合的方法去除有机成分，然后将材料在1500℃下烧结以完成该过程。进行了热重试验和差示热分析以制定合适的降解和烧结程序。对制备的骨架进行微观结构分析、孔隙率分析和弯曲试验。烧结过程产生了无残余碳含量的多孔氧化铝陶瓷样品。由于粘结剂的降解可能会出现开孔孔隙率。将液态金属渗入陶瓷中，有效地填充任何开孔孔隙并形成铝相的三维网络。使用高分辨率扫描电子显微镜、计算机断层扫描、硬度测试和弯曲强度测试对制备材料的微观结构和特性进行了研究。所开发的复合材料具有所需的结构——低孔隙率和增强相的均匀分布，其机械性能优于基体，硬度高出两倍多。因此，所开发的创新制造技术可在实际中应用。
