镍基合金闭孔空心球的制备（英文）

Preparation of Nickel-Based Alloy Closed-pore Hollow Spheres

采用3种不同粒度的镍基合金粉，通过挂浆法结合粉末冶金工艺制备出壁厚为0．3-0．4mm，直径为3-3．5mm的金属空心球结构。得出了浆料的最佳配比，粘接剂和粉末的质量比为1／2。测试了空心球结构的密度、孔隙度和压缩强度，分析结果显示随着原始粉末粒度的减小，孔隙度减小，密度和抗压强度增加。压缩强度分别是16、18、28MPa，实际相对抗压强度仅为理论抗压强度的50％。

Nickel-based alloy closed-pore hollow spheres were fabricated using three kinds of powders with different particle sizes by powder metallurgy process. The diameter of the sphere is about 3-3.5 mm and the wall thickness is 0.3-0.4 mm. The optimum slurry ratio is the liquid-solid ratio of 1/2. Some performances of metal hollow sphere （MHS） materials made of the powders with different particle sizes were discussed. The results show that the porosity decreases, density increases with the gradual decrease of particle size; in the meantime the compression strength of MHS increases from 16 to 18 MPa and then to 28 MPa, and actual relative compression strength value is only 50% of the theory value.