Bętkowska Aleksandra, Podsiadło Marcin, Polkowska Adelajda, Włoch Grzegorz, Polkowski Wojciech
Łukasiewicz Research Network, Krakow Institute of Technology, Zakopiańska 73 Str, Krakow, 30-418, Poland.
Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Mickiewicza 30 Av, Krakow, 30-059, Poland.
Sci Rep. 2025 Jan 2;15(1):598. doi: 10.1038/s41598-024-84321-3.
Highly porous nickel-based superalloys appear as attractive candidates to be applied e.g. as seals in gas turbine engines instead of honeycomb structures. Among various methods of producing open-porous materials, a space holder approach provides number of benefits regarding economic and ecological aspects of production. In this work, the pioneering results of microstructure and mechanical properties analyses of highly porous Hastelloy-X nickel superalloy produced by the space holder approach, are presented. The materials were fabricated by using spherical fine Hastelloy-X powders and carbamide particles as batch materials. A multi-step powder metallurgy and thermomechanical processing was applied to produce open porous samples having a total volumetric porosity of 50, 60 and 70%. The produced materials were subjected to non-destructive (X-ray computed tomography) and metallographic inspections. Mechanical properties of the porous Hastelloy-X samples were examined in static room temperature compression tests, to discuss the effect of obtained porosity on compressive response.
高度多孔的镍基高温合金似乎是有吸引力的候选材料，例如可用于燃气涡轮发动机的密封件，以替代蜂窝结构。在各种生产开孔材料的方法中，占位法在生产的经济和生态方面具有诸多优势。在这项工作中，展示了通过占位法生产的高度多孔哈氏合金X镍基高温合金的微观结构和力学性能分析的开创性成果。这些材料是通过使用球形细哈氏合金X粉末和尿素颗粒作为批料制造的。采用多步粉末冶金和热机械加工来生产总体积孔隙率为50%、60%和70%的开孔多孔样品。对所生产的材料进行了无损（X射线计算机断层扫描）和金相检查。在静态室温压缩试验中检查了多孔哈氏合金X样品的力学性能，以讨论所得孔隙率对压缩响应的影响。
