Dec 11, 2024 · Following this, in order to study the role of Nb–Ta interlayer, a 100 nm thick Pt layer is applied to the best-performing Nb–Ta alloy samples. Energy dispersive x-ray spectroscopy (EDX) and x-ray photoelectron spectroscopy (XPS) analyses are used to confirm the presence of these layers.

Sep 1, 2023 · The tribological behavior of AlCr 0.5 NbTa x Ti 4– x (x = 0, 0.5, and 1) refractory high-entropy alloys was systematically investigated from room temperature to 800 °C. The relationship between the alloy composition, microstructure, mechanical properties, and tribological performance was analyzed.

Mar 15, 2025 · X-ray photoelectron spectroscopy (XPS) is used to investigate the chemistry of oxides. To acquire the phase structure of the oxide scale, Grazing Incident X-ray Diffraction (GIXRD, Cu-Ka) was performed on both the oxide surface and the unoxidized bare alloy with an incident angle of 1.5° (The penetration depth is expected to be 0.36 µm for ...

Nov 21, 2024 · 在本研究中，研究了铌钽（Nb-Ta）合金作为一种具有成本效益的钛毡层间涂层，以减少质子交换膜水电解槽（PEMWEs）中多孔传输层（PTLs）上的贵金属负载。 采用不同的沉积功率，通过溅射机将不同成分的铌钽合金以薄膜涂层的形式涂覆在Ti毡上。 未涂覆和涂覆的钛毡样品都是通过原位和非原位表征来测量的。 结果表明，虽然所有涂层样品的性能都优于未涂层的ti毡，但Ta含量越高，性能指标越好。 然后在性能最好的Nb-Ta合金（Nb20%-Ta80%/ ti毡） …

Jun 4, 2024 · With increased NbTa content (decreased x value), the system tends to achieve thermally stable dual bcc phases upon annealing; in contrast, alloys with increased TiZrHf content (x > 0.6) maintain a single-composition nanocomposite state, impeding crystallization and grain growth. This investigation not only broadens the understanding of thermal ...

Dec 4, 2023 · Six selected high-resolution XPS spectra measured for (NbTa) \(_{0.67}\) (MoHfW) \(_{0.33}\) C powder are presented in Figure 8. The detailed analysis of the XPS signal envelope in the 218 to 234 eV BE range allows to distinguish seven components (Figure 8(a)).

Apr 22, 2024 · This distinction suggests that the mechanical properties of high-entropy carbide ceramics (HfTiZr) 1 − x (NbTa) x C can be designed by adjusting the concentration of different group metal elements to activate specific slip systems. In this work, we investigated the influence of the proportion and distribution of various metal atoms on ...

Jul 15, 2023 · The x-ray photoemission spectroscopy (XPS) technique is used to understand the chemical oxidation states and the ligand coordination of AlMo 0.5 NbTa 0.5 TiZr alloy specimen. The high resolution XPS spectra with deconvoluted peaks using XPSpeakfit41 software with an iterative Shirley-type background subtraction for Si, Mo, O, Zr, Nb, Al, Ti ...

Jun 2, 2006 · Deposition conditions were optimized to yield fully oxidized films as determined from x-ray photoelectron spectroscopy (XPS). The film properties were also investigated using …

xps谱图分析——主线. 最强的光电子线常常是谱图中强度最大、峰宽最小、对称性最好的谱峰，称为xps谱图中的主线。每一种元素(h和he除外)都有自己最强的、具有表征作用的光电子线，它是元素定性分析的主要依据。