Li Yanchun, Sui Yi, Feng Yicheng, Zhang Yu, Li Yan, Song Meihui, Gong Shulin, Xie Yang
Institute of Advanced Technology, Heilongjiang Academy of Science, Harbin 150000, China.
School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150080, China.
ACS Omega. 2024 Apr 11;9(16):18358-18365. doi: 10.1021/acsomega.4c00291. eCollection 2024 Apr 23.
The AlCoCrFeNi high-entropy alloy powder was produced by using a plasma rotating electrode process. The morphology, microstructure, and physical properties of the powder were characterized. The powder exhibited a smooth surface and a narrow particle size distribution with a single peak. The relationships between particle size and secondary dendrite arm space as well as cooling rate were evaluated as follows: λ = 0.0105 + 0.062 and = 4.34 × 10 + 2.62 × 10, respectively. The AlCoCrFeNi powder mainly consisted of fcc + bcc phases. As the powder particle size decreased, the microstructure of the powder changed from dendritic to columnar or equiaxed, along with a decrease in the fcc content and an increase in the bcc content. The tap density (4.76 g cm), flowability (15.01 s × 50 g), oxygen content (<300 ppm), and sphericity (>94%) of the powder indicated suitability for additive manufacturing.
AlCoCrFeNi高熵合金粉末采用等离子旋转电极工艺制备。对该粉末的形貌、微观结构和物理性能进行了表征。该粉末表面光滑，粒度分布窄且呈单峰。粒度与二次枝晶臂间距以及冷却速率之间的关系评估如下：λ = 0.0105 + 0.062以及 = 4.34 × 10 + 2.62 × 10，单位分别为（此处原文有误，无法准确翻译）。AlCoCrFeNi粉末主要由面心立方（fcc）+体心立方（bcc）相组成。随着粉末粒度减小，粉末的微观结构从树枝状转变为柱状或等轴状，同时面心立方相含量降低，体心立方相含量增加。该粉末的振实密度（4.76 g/cm³）、流动性（15.01 s×50 g）、氧含量（<300 ppm）和球形度（>94%）表明其适用于增材制造。
