Hu Xiao-Zhen, Tan Xiao-Bo, Xie Bin, Yao Hai-Long, Yang Chao, Zhou Tao
School of Architecture Engineering and Planning, Jiujiang University, Jiujiang 332005, China.
Intelligent Manufacturing Industry College, Jiangxi University of Engineering, Xinyu 338004, China.
Materials (Basel). 2024 Dec 13;17(24):6096. doi: 10.3390/ma17246096.
To explore the feasibility of preparing Zn alloy bulk, Zn-6Cu deposit was prepared by cold-spraying additive manufacturing. Microstructure, tensile and wear behavior were investigated before and after heat treatment. Cold-sprayed Zn-6Cu deposit was constituted by irregular flattening particles and pores after heat treatment. Zn-6Cu deposits were composed of Zn and CuZn phases in addition to ZnO phase regardless of heat treatment, but the full width at half maximum of both the CuZn and the Zn phase were varied. The yield strength and ultimate tensile strength of Zn-6Cu deposits after post heat treatment were, respectively, increased from 83.8 ± 28.7 MPa and 159.6 ± 44.5 MPa to 89.4 ± 24.4 MPa and 223.8 ± 37.1 MPa. Fracture morphology after tensile testing exhibited main features of dimples, pores and cleaving particles. The friction coefficient and wear rate of Zn-6Cu deposits were increased after heat treatment, and the corrosive wear exhibited a lower friction coefficient and wear rate than the dry wear due to the lubricant of simulated body fluid. Grooves and localized delamination were the main wear features of Zn-6Cu deposits regardless of both the heat treatment and wear condition. This result indicates a potential application of cold-sprayed Zn-6Cu deposits comparable to the casting ones.
为了探索制备锌合金块体的可行性，采用冷喷涂增材制造技术制备了Zn-6Cu沉积物。研究了热处理前后的微观结构、拉伸和磨损行为。冷喷涂Zn-6Cu沉积物在热处理后由不规则扁平颗粒和孔隙组成。无论是否进行热处理，Zn-6Cu沉积物除了ZnO相外还由Zn和CuZn相组成，但CuZn相和Zn相的半高宽均有所变化。热处理后Zn-6Cu沉积物的屈服强度和抗拉强度分别从83.8±28.7MPa和159.6±44.5MPa提高到89.4±24.4MPa和223.8±37.1MPa。拉伸试验后的断口形貌呈现出韧窝、孔隙和解理颗粒的主要特征。热处理后Zn-6Cu沉积物的摩擦系数和磨损率增加，由于模拟体液的润滑作用，腐蚀磨损的摩擦系数和磨损率低于干摩擦磨损。无论热处理和磨损条件如何，沟槽和局部脱层都是Zn-6Cu沉积物的主要磨损特征。这一结果表明冷喷涂Zn-6Cu沉积物具有与铸造沉积物相当的潜在应用价值。
