Liu Jiaan, Si Fujian, Zhu Xianyong, Liu Yaohui, Zhang Jiawei, Liu Yan, Zhang Chengchun
Key Laboratory of Automobile Materials (Ministry of Education), College of Materials Science and Engineering, Jilin University, Changchun 130022, China.
Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, China.
Materials (Basel). 2017 Jan 24;10(2):98. doi: 10.3390/ma10020098.
Hybrid Ni/Al foams were fabricated by depositing electroless Ni-P (EN) coatings on open-cell Al foam substrate to obtain enhanced mechanical properties. The microstructure, chemical components and phases of the hybrid foams were observed and analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD), respectively. The mechanical properties of the foams were studied by compressive tests at different temperatures. The experiment results show that the coating is mainly composed of Ni and P elements. There was neither defect at the interface nor crack in the coatings, indicating that the EN coatings had fine adhesion to the Al substrate. The compressive strengths and energy absorption capacities of the as-received foam and hybrid foams decrease with the increasing testing temperatures, but the hybrid foams exhibit a lower decrement rate than the as-received foam. This might be attributed to the different failure mechanisms at different testing temperatures, which is conformed by fractography observation.
通过在开孔泡沫铝基体上沉积化学镀镍磷（EN）涂层来制备混合镍/铝泡沫，以获得增强的力学性能。分别采用扫描电子显微镜（SEM）、能谱仪（EDS）和X射线衍射仪（XRD）对混合泡沫的微观结构、化学成分和相进行了观察与分析。通过在不同温度下的压缩试验研究了泡沫的力学性能。实验结果表明，涂层主要由镍和磷元素组成。涂层界面处既无缺陷也无裂纹，表明EN涂层与铝基体具有良好的附着力。原样泡沫和混合泡沫的抗压强度和能量吸收能力均随测试温度的升高而降低，但混合泡沫的下降速率低于原样泡沫。这可能归因于不同测试温度下的不同失效机制，断口观察证实了这一点。
