Effect of chemical potential of carbon on phase transformation and corrosion of JLF-1 steel in a static lithium
Effect of chemical potential of carbon on phase transformation and corrosion of JLF-1 steel in a static lithium
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DOI：
10.1016/j.jnucmat.2009.08.005
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发表时间：
2009-10
影响因子：
3.1
通讯作者：
Qi Xu;M. Kondo;T. Nagasaka;T. Muroga;O. Yeliseyeva
中科院分区：
文献类型：
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作者：
Qi Xu;M. Kondo;T. Nagasaka;T. Muroga;O. Yeliseyeva
研究了JLF-1（Fe-9Cr-2W-0.1C）低活化铁素体/马氏体（RAFM）钢在静态锂（Li）中的腐蚀行为和相变规律。将样品在600 ° C下暴露于静态Li 250小时。锂中的碳势是由钼和铌组成的坩埚内表面碳化物的形成控制的。这些材料被期望形成稳定的碳化物，并在Li中起碳陷阱的作用，这导致Li的碳势降低。通过与在Fe-9Cr和SUS316L（18Cr-12Ni）制成的坩埚中进行的试验进行比较，表征了低碳电位对腐蚀和相变的影响，该坩埚不起碳陷阱的作用。Nb和Mo引起的低碳势导致JLF-1试样表面的碳溶解到Li中。在Nb坩埚中测试后观察到的相变深度比在Mo坩埚中测试的深。这是因为Nb碳化物的稳定性比Mo碳化物的稳定性大，导致碳化物从表面溶解的驱动力更大。
The corrosion and the phase transformation of RAFM (Reduced Activation Ferritic/Martensitic) steel, JLF-1(Fe–9Cr–2W–0.1C), in static lithium (Li) were investigated. The specimens were exposed to static Li at 600°C for 250h. The carbon potential in Li was controlled by the carbide formation on inner surface of the crucible, which was made of Mo and Nb. These materials were expected to form stable carbide, and worked as carbon trap in Li, which resulted in the decrease in the carbon potential of Li. The effect of low carbon potential on the corrosion and the phase transformation was characterized by comparison with the test performed in the crucible made of Fe–9Cr and SUS316L (18Cr–12Ni), which has no effect as carbon traps. The low carbon potential caused by Nb and Mo caused the dissolution of carbon from the surface of JLF-1 specimen to Li. The depth of the phase transformation observed after the test in Nb crucible was deeper than that tested in Mo crucible. This was because the stability of the Nb carbide was larger than that of Mo carbide causing larger driving force for the dissolution of carbides from the surface.