Effect of the Ti-6Al-4V powder size on the microstructure and mechanical properties of composites with nickel-coated graphene nanoflakes
Effect of the Ti-6Al-4V powder size on the microstructure and mechanical properties of composites with nickel-coated graphene nanoflakes
复制标题
DOI：
10.1016/j.matchar.2021.111627
复制
发表时间：
2021-12-11
影响因子：
4.7
通讯作者：
Chang, Hui
中科院分区：
文献类型：
--
作者：
Guo, Yanhua;Huang, Jiaqiang;Chang, Hui
本文采用化学镀镍和等离子烧结法制备了不同粒径（0-25，15-53和53-150 μ m）的0. 5 wt% Ni-P@GNF/ Ti-6Al-4V复合材料。等离子体烧结温度和烧结压力分别为900 ℃和50 MPa。通过光学显微镜、扫描电镜、能谱仪和压缩实验研究了3种复合材料的微观结构和力学性能。结果表明，石墨烯纳米片的加入细化了Ti-6Al-4V复合材料的显微组织，提高了复合材料的抗压强度。当Ti-6Al-4V粉末粒度为0-25 μ m时，0. 5 wt% Ni-P@ GNF/TC 4复合材料的抗压强度达到1339 MPa，比Ti-6Al-4V合金（970 MPa）提高了37.91%。随着球形粉末粒径的增大，网络结构中增强相的尺寸变粗，塑性提高。
In this study, 0.5 wt% Ni-P@GNF/ Ti-6Al-4V composites with different particle sizes (0-25, 15-53 and 53-150 mu m) were fabricated via chemical nickel plating and speak plasma sintering. The plasma sintering temperature and the sintering pressure were 900 degrees C and 50 MPa, respectively. The microstructure and mechanical properties of the three composites were investigated via optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy and compression experiments. The results showed that the microstructures of the composites were refined, and the compressive strength of the Ti-6Al-4V incorporated with graphene nanosheets was higher than that of the pure Ti-6Al-4V. Herein, with 0-25 mu m Ti-6Al-4V powder, the compressive strength of 0.5 wt% Ni-P@GNFs/TC4 composite reaches 1339 MPa, which was an increase of 37.91% versus Ti-6Al-4V alloy (970 MPa). Moreover, with increasing spherical powder particle size, the size of the reinforcing phase of the network structure was coarser, and the plasticity was improved.