In this study, we firstly fabricated green spheres with an automatic coating machine using 316L stainless steel powder, polystyrene particles, and polyvinyl alcohol aqueous solution. These green spheres were then sintered at different temperatures in a high-temperature vacuum furnace to produce hollow metal spheres (HMSs). The effects of the sintering temperatures on the physical parameters, microstructure, and compression performance of the HMSs were investigated. Results show that the diameter and the wall thickness of HMSs decrease gradually with increasing sintering temperatures, while the wall density and overall density of the HMS increase steadily. When the sintering temperature is 1250 °C, the HMSs have the lowest wall porosity (24.44 ± 0.06 %) and the highest overall density (1.59 ± 0.03 g/cm³), which provides the best compressive performance of all the sintering temperatures we evaluated. In this paper, we also discuss the deformation mechanism of HMSs.

在这项研究中，我们首先使用 316L 不锈钢粉末、聚苯乙烯颗粒和聚乙烯醇水溶液通过自动涂层机制造了绿色球体。然后将这些生球在高温真空炉中在不同温度下烧结以生产空心金属球 (HMS)。研究了烧结温度对 HMS 的物理参数、微观结构和压缩性能的影响。结果表明，随着烧结温度的升高，HMS的直径和壁厚逐渐减小，而HMS的壁密度和整体密度则稳定增加。当烧结温度为 1250 °C 时，HMS 具有最低的壁孔隙率 (24.44 ± 0.06 %) 和最高的整体密度 (1.59 ± 0.03 g/cm ³)，它提供了我们评估的所有烧结温度的最佳压缩性能。在本文中，我们还讨论了 HMS 的变形机制。