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引用次数: 0
摘要
由于磁感应强度的差异，用于重建骨骼结构的金属往往会干扰磁共振成像（MRI）；因此，需要开发磁感应强度较低的金属，用于植入装置。在此，我们研究了具有低磁感应强度和优异机械性能的 Zr-14Nb-5Ta-1Mo 合金的腐蚀特性。Zr-14Nb-5Ta-1Mo 的点蚀电位高于纯 Zr。Zr-14Nb-5Ta-1Mo 的无源电流密度也比纯 Zr 高，这可能与 Nb 和 Ta 的存在导致初始无源膜重建缓慢有关。XPS 显示，被动膜富含 Nb 和 Ta。因此，虽然 Zr-14Nb-5Ta-1Mo 合金在模拟体液中表现出较高的初始无源电流密度，但它形成的稳定无源膜抑制了局部腐蚀。因此，Zr-14Nb-5Ta-1Mo 是一种很有前景的植入材料合金。
Corrosion behavior of Zr-14Nb-5Ta-1Mo alloy in simulated body fluid.
Metals that are used to reconstruct skeletal structures often interfere with magnetic resonance imaging (MRI) owing to differences in magnetic susceptibility; consequently, metals with lower magnetic susceptibilities need to be developed for use in implant devices. Herein, we investigated the corrosion properties of the Zr-14Nb-5Ta-1Mo alloy, which exhibits low magnetic susceptibility and excellent mechanical properties. The pitting potential of Zr-14Nb-5Ta-1Mo was higher than that of pure Zr. The passive current density of Zr-14Nb-5Ta-1Mo also higher than that of pure Zr, which is ascribable to slow reconstruction of the initial passive film associated with the presence of Nb and Ta. XPS revealed that the passive film is enriched with Nb and Ta. Therefore, while the Zr-14Nb-5Ta-1Mo alloy exhibited a high initial passive current density in simulated body fluid, it formed a stable passive film that suppressed localized corrosion. Zr-14Nb-5Ta-1Mo is therefore a prospective implant-material alloy candidate.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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