Glowka Karsten, Zubko Maciej, Świec Paweł, Prusik Krystian, Szklarska Magdalena, Chrobak Dariusz, Lábár János L, Stróż Danuta
Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A St., 41-500 Chorzow, Poland.
Department of Physics, Faculty of Science, University of Hradec Králové, Rokitanského 62, 50003 Hradec Kralove, Czech Republic.
Materials (Basel). 2022 Jan 5;15(1):393. doi: 10.3390/ma15010393.
The presented work was focused on investigating the influence of the (hafnium and zirconium)/molybdenum ratio on the microstructure and properties of TiTaNb(ZrHf)Mo (where: x = 0, 5, 10, 15, 20 at.%) high entropy alloys in an as-cast state. The designed chemical composition was chosen due to possible future biomedical applications. Materials were obtained from elemental powders by vacuum arc melting technique. Phase analysis revealed the presence of dual body-centered cubic phases. X-ray diffraction showed the decrease of lattice parameters of both phases with increasing molybdenum concentration up to 10% of molybdenum and further increase of lattice parameters. The presence of two-phase matrix microstructure and hafnium and zirconium precipitates was proved by scanning and transmission electron microscopy observation. Mechanical property measurements revealed decreased micro- and nanohardness and reduced Young's modulus up to 10% of Mo content, and further increased up to 20% of molybdenum addition. Additionally, corrosion resistance measurements in Ringers' solution confirmed the high biomedical ability of studied alloys due to the presence of stable oxide layers.
本研究工作聚焦于探究（铪和锆）/钼比例对铸态TiTaNb(ZrHf)Mo（其中：x = 0、5、10、15、20原子百分比）高熵合金微观结构和性能的影响。由于未来可能的生物医学应用，选择了所设计的化学成分。通过真空电弧熔炼技术从元素粉末中获得材料。相分析表明存在双体心立方相。X射线衍射显示，随着钼浓度增加至10%，两相的晶格参数均减小，而钼浓度进一步增加时，晶格参数增大。扫描和透射电子显微镜观察证实了两相基体微观结构以及铪和锆析出物的存在。力学性能测量表明，钼含量达10%时，微观和纳米硬度降低，杨氏模量减小，而钼添加量进一步增至20%时，上述性能则增大。此外，在林格氏溶液中的耐腐蚀性能测量证实，由于存在稳定的氧化层，所研究的合金具有较高的生物医学适用性。
