Piotrkiewicz Paulina, Zygmuntowicz Justyna, Wachowski Marcin, Cymerman Konrad, Kaszuwara Waldemar, Więcław Midor Anna
Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St., 02-507 Warsaw, Poland.
Faculty of Mechanical Engineering, Military University of Technology, 2 gen. S. Kaliskiego St., 00-908 Warsaw, Poland.
Materials (Basel). 2022 Mar 1;15(5):1848. doi: 10.3390/ma15051848.
This study's main goal was to obtain and characterize AlO-Cu-Ni composites with different metallic phase content. The study analyzed the three series of samples differing in the metallic phase 5, 10, 15 vol.% volume contents. An identical volume share of the metallic components in the metallic phase was used. Ceramic-metal composites were formed using uniaxial pressing and sintered at a temperature of 1400 °C. The microstructural investigation of the AlO-Cu-Ni composite and its properties involved scanning electron microscopes observations and X-ray diffraction. The size of the metallic phase in the ceramic matrix was performed using a stereological analysis. Microhardness analysis with fracture toughness measures was applied to estimate the mechanical properties of the prepared materials. Additionally, magnetic measurements were carried out, and the saturation magnetization was determined on the obtained magnetic hysteresis loops. The prepared samples, regardless of the content of the metallic phase in each series, were characterized by a density exceeding 95% of the theoretical density. The magnetic measurements exhibited that the fabricated composites had ferromagnetic properties due to nickel and nickel-rich phases. The hardness of the samples containing 5, 10, 15 vol.% metallic phases decreased with an increase in the metallic phase content, equal to 17.60 ± 0.96 GPa, 15.40 ± 0.81 GPa, 12.6 ± 0.36 GPa, respectively.
本研究的主要目标是获得并表征具有不同金属相含量的AlO-Cu-Ni复合材料。该研究分析了金属相体积含量分别为5%、10%、15%的三个系列样品。金属相中金属成分的体积份额相同。采用单轴压制形成陶瓷-金属复合材料，并在1400℃的温度下烧结。对AlO-Cu-Ni复合材料的微观结构及其性能的研究包括扫描电子显微镜观察和X射线衍射。使用体视学分析来确定陶瓷基体中金属相的尺寸。应用带有断裂韧性测量的显微硬度分析来评估所制备材料的力学性能。此外，还进行了磁性测量，并根据所获得的磁滞回线确定饱和磁化强度。所制备的样品，无论每个系列中金属相的含量如何，其密度均超过理论密度的95%。磁性测量表明，由于镍和富镍相的存在，所制备的复合材料具有铁磁性能。金属相含量为5%、10%、15%的样品的硬度随着金属相含量的增加而降低，分别为17.60±0.96 GPa、15.40±0.81 GPa、12.6±0.36 GPa。
