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首页> 美国卫生研究院文献>Scientific Reports >Real Time Imaging of Deuterium in a Duplex Stainless Steel Microstructure by Time-of-Flight SIMS
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Real Time Imaging of Deuterium in a Duplex Stainless Steel Microstructure by Time-of-Flight SIMS

机译：飞行时间SIMS对双相不锈钢微结构中氘的实时成像

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For more than one century, hydrogen assisted degradation of metallic microstructures has been identified as origin for severe technical component failures but the mechanisms behind have not yet been completely understood so far. Any in-situ observation of hydrogen transport phenomena in microstructures will provide more details for further elucidation of these degradation mechanisms. A novel experiment is presented which is designed to elucidate the permeation behaviour of deuterium in a microstructure of duplex stainless steel (DSS). A hydrogen permeation cell within a TOF-SIMS instrument enables electrochemical charging with deuterium through the inner surface of the cell made from DSS. The outer surface of the DSS permeation cell exposed to the vacuum has been imaged by TOF-SIMS vs. increasing time of charging with subsequent chemometric treatment of image data. This in-situ experiment showed evidently that deuterium is permeating much faster through the ferrite phase than through the austenite phase. Moreover, a direct proof for deuterium enrichment at the austenite-ferrite interface has been found.
机译：一个多世纪以来，氢辅助金属微结构的降解已被确定为严重的技术组件故障的起因，但​​到目前为止，其背后的机理尚未完全被理解。在微观结构中对氢传输现象的任何原位观察都将为进一步阐明这些降解机理提供更多细节。提出了一种新颖的实验，旨在阐明氘在双相不锈钢（DSS）显微组织中的渗透行为。 TOF-SIMS仪器中的氢气渗透池可通过氘代DSS制成的池的内表面对氘进行电化学充电。通过TOF-SIMS对DSS渗透池暴露于真空的外表面进行了成像，这与增加充电时间以及随后对图像数据进行化学计量处理有关。该原位实验显然表明，氘在铁素体相中的渗透比在奥氏体相中的渗透快得多。此外，已经发现了奥氏体-铁素体界面上氘富集的直接证据。

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