Zygmuntowicz Justyna, Wachowski Marcin, Zielant Dominika, Kaszuwara Waldemar
Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska Str., 02-507 Warsaw, Poland.
Faculty of Mechanical Engineering, Military University of Technology, 2 gen. S. Kaliskiego St., 00-908 Warsaw, Poland.
Materials (Basel). 2021 Feb 18;14(4):955. doi: 10.3390/ma14040955.
The main aim of the investigation was to determine the impact of the content of nickel and the content of slurry on the nature of the microstructure and physical properties of the final products. In the study, six types of slurries were examined and prepared, differing in both the amounts of content of Ni metallic phase particles (5 vol.%, 10 vol.%, and 20 vol.%) and the amount of content of solid content in the prepared slurries (35 vol.%, and, 50 vol.%). The centrifugal slip casting (CSC) method in a magnetic field was used to fabricate the composites. This technique allowed the production of high-density ZrO-Ni composites after sintering. Composites containing 50 vol.% of the solid content were characterized by a relative density equal to 99%. Applying the magnetic field allows controlling the distribution of the ferromagnetic phase (Ni) in the ceramic matrix (ZrO). Based on the results obtained, it was found that the nature of the composites obtained is influenced by the rheological properties of the slurries, depending on their composition. The applicability of the CSC in the magnetic field technique for the production of the composite is characterized by a gradient in the distribution of components on the longitudinal section and has been proved. Based on the obtained results, a model for shaping the microstructure of composites with a longitudinal section was proposed. This work enabled a better understanding of creating microstructures in materials fabricated by centrifugal slip casting in a magnetic field.
该研究的主要目的是确定镍含量和浆料含量对最终产品微观结构性质和物理性能的影响。在该研究中，对六种类型的浆料进行了检测和制备，它们在金属镍相颗粒的含量（5体积%、10体积%和20体积%）以及所制备浆料中的固体含量（35体积%和50体积%）方面均有所不同。采用磁场中的离心式注浆成型（CSC）方法来制备复合材料。该技术使得烧结后能够生产出高密度的ZrO-Ni复合材料。固体含量为50体积%的复合材料的相对密度为99%。施加磁场能够控制铁磁相（Ni）在陶瓷基体（ZrO）中的分布。基于所获得的结果发现，所得到的复合材料的性质受浆料流变性能的影响，这取决于其成分。磁场技术中CSC在复合材料生产中的适用性表现为纵向截面中成分分布的梯度，这已得到证实。基于所获得的结果，提出了一种用于塑造具有纵向截面的复合材料微观结构的模型。这项工作有助于更好地理解在磁场中通过离心式注浆成型制备的材料中微观结构的形成。
