论文标题
搜索以面部为中心的立方体高渗透合金超导体的试验
Trial of a search for a face-centered-cubic high-entropy alloy superconductor
论文作者
论文摘要
为了发现以面部为中心的立方体（FCC）高渗透合金（HEA）超导体，我们对含NB或含PB的多组分合金进行了材料研究。尽管某些含有NB样品的X射线衍射（XRD）模式表现出主要的FCC相，但未观察到3 K的超导信号。使用能量分散X射线光谱仪检查所有样品都是多相的，但是在其中发现了几个新的NB含NB的Heapass。据证实，含PB的HE或第四合金的合成可能很困难，这可能是由于组成元素之间的晶体结构和原子半径差异很大，低反应温度以及合成中缺乏快速冷却过程。尽管这项研究产生了负面的结果，但提供了一些提示，以改进搜索FCC Hea超导体的策略。此外，我们的结果可作为未来HEA预测的基本数据或基于CALPHAD（相图计算）方法的NB或含NB或PB的多组分合金研究的研究。
With the aim of the discovery of face-centered-cubic (fcc) high-entropy alloy (HEA) superconductor, we have carried out materials research on Nb or Pb-containing multi-component alloys. Although the X-ray diffraction (XRD) patterns of some Nb-containing samples exhibited the dominant fcc phases, no superconducting signals were observed down to 3 K. Examination with an energy dispersive X-ray spectrometer revealed that all samples were multi-phase, but the existence of several new Nb-containing HEA phases was found in them. It was confirmed that the synthesis of Pb-containing an HEA or quaternary alloy would be difficult, probably due to the large differences in the crystal structure and atomic radius among constituent elements, low reaction temperature and the lack of a rapid cooling process in the synthesis. Despite the negative results in this research, some hints for an improved strategy for the search for an fcc HEA superconductor are provided. Moreover, our results are useful as fundamental data for future HEA predictions or for studies of phase relations in Nb or Pb-containing multi-component alloys based on the CALPHAD (calculation of phase diagram) method.
