Glowka Karsten, Zubko Maciej, Gębura Sandra, Świec Paweł, Prusik Krystian, Szklarska Magdalena, Stróż Danuta
Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A St., 41-500 Chorzów, Poland.
Department of Physics, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500-03 Hradec Králové, Czech Republic.
Materials (Basel). 2023 Feb 9;16(4):1456. doi: 10.3390/ma16041456.
The presented work aimed to investigate the influence of the hafnium/(zirconium and molybdenum) ratio on the microstructure, microhardness and corrosion resistance of TiTaNb(ZrMo)Hf (where x = 0, 5, 10, 15 and 20 at.%) high entropy alloys in an as-cast state produced from elemental powder and obtained via the vacuum arc melting technique. All studied alloys contained only biocompatible elements and were chosen based on the thermodynamical calculations of phase formation predictions after solidification. Thermodynamical calculations predicted the presence of multi-phase, body-centered cubic phases, which were confirmed using X-ray diffraction and scanning electron microscopy. Segregation of alloying elements was recorded using elemental distribution maps. A decrease in microhardness with an increase in hafnium content in the studied alloys was revealed (512-482 HV1). The electrochemical measurements showed that the studied alloys exhibited a high corrosion resistance in a simulated body fluid environment (breakdown potential 4.60-5.50 V vs. SCE).
本文工作旨在研究铪/（锆和钼）比例对通过真空电弧熔炼技术由元素粉末制备的铸态TiTaNb(ZrMo)Hf（其中x = 0、5、10、15和20原子%）高熵合金的微观结构、显微硬度和耐腐蚀性的影响。所有研究的合金仅包含生物相容性元素，并且是根据凝固后相形成预测的热力学计算选择的。热力学计算预测了多相体心立方相的存在，这通过X射线衍射和扫描电子显微镜得到了证实。使用元素分布图记录了合金元素的偏析。研究发现，随着所研究合金中铪含量的增加，显微硬度降低（512 - 482 HV1）。电化学测量表明，所研究的合金在模拟体液环境中表现出高耐腐蚀性（击穿电位相对于饱和甘汞电极（SCE）为4.60 - 5.50 V）。
