Characterization of air-formed surface oxide film on Ti-29Nb-13Ta-4.6Zr alloy surface using XPS and AES
Characterization of air-formed surface oxide film on Ti-29Nb-13Ta-4.6Zr alloy surface using XPS and AES
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DOI：
10.1016/j.corsci.2008.06.002
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发表时间：
2008-08-01
影响因子：
8.3
通讯作者：
Hanawa, T.
中科院分区：
文献类型：
--
作者：
Tanaka, Y.;Nakai, M.;Hanawa, T.
利用X射线光电子能谱(XPS)和俄歇电子能谱(AES)对Ti-29Nb-13Ta-4.6Zr合金(TNTZ)表面氧化膜进行精确表征，以了解TNTZ表面氧化膜的成分和化学状态。为了进行比较，还对钛、铌、钽和锆等金属成分进行了表征，以考虑这些金属对其合金表面氧化膜形成的影响。 TNTZ 及其组件表面氧化膜的表征揭示了以下问题。 TNTZ上的表面氧化膜由含有钛、铌、钽和锆的复合氧化物组成，但形成连续层并且非常薄，约100nm。 3.7纳米。氧化膜没有被完全氧化，因为它含有各种价态的阳离子。特别是，氧化物中钽的氧化受到抑制。由于这种氧化抑制作用，钽在 TNTZ 的基材中富集，就在表面氧化物下方。 TNTZ 中表面氧化膜的形成主要由钛决定。元素的优先氧化并不总是取决于该元素的初始氧化电位、从较低价态到较高价态的氧化能以及脱水过程之间的关系。换句话说，复杂的竞争控制着表面氧化物的最终组成。 (C) 2008 Elsevier Ltd. 保留所有权利。
The surface oxide film on a Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) was precisely characterized using X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) to understand the composition and chemical state of the surface oxide film of TNTZ. For comparison, the component metals, titanium, niobium, tantalum, and zirconium, were also characterized to consider the effect of those on the formation of the surface oxide film on their alloy. The characterization of the surface oxide films on TNTZ and its component revealed the following issues. The surface oxide film on TNTZ consists of a composite oxide that contains titanium, niobium, tantalum, and zirconium but forms continuous layer and is very thin, ca. 3.7 nm. The oxide film is not completely oxidized because it contains various valences of cations. In particular, the oxidation of tantalum is inhibited in the oxide. Tantalum is enriched in the substrate in TNTZ just under the surface oxide because of this inhibition in the oxidation. The formation of the surface oxide film in TNTZ is predominantly governed by titanium. The preferential oxidation of an element is not always dependent on the initial oxidation potential of that element, the relationship between the oxidation energy from a smaller valence to a larger valence, and the dehydration process. In other words, a complicated competition governs the resultant composition of surface oxide. (C) 2008 Elsevier Ltd. All rights reserved.