带热浸铝涂层MANETⅡ马氏体钢的氢渗透性能研究  

Hydrogen Permeation through MANET Ⅱ Steel with Hot Dipping Aluminized Coating

作　　者：姚振宇[1] M.Chini A.Aiello G.Benamati 

机构地区：[1]中国原子能科学研究院,北京275信箱51分箱102413 [2]Department of Physics,University of Trento,trentoitaly38100 [3]ENEACR Brasimone

出　　处：《核科学与工程》2002年第1期36-41,46,共7页Nuclear Science and Engineering

摘　　要：在 3 0 0～ 45 0℃温度范围内 ,分别在氢气相和液态铅锂合金相中 ,开展了带热浸铝涂层MANETⅡ马氏体钢的氢渗透性能研究。结果表明 ,实验所得到的氢渗透率减低因子 (PRF) ,在气相中为 62 0～2 63 ,在液态铅锂合金相中为 45～ 3 0。但仍然没有满足DEMO聚变堆的设计要求。涂层的自修复效应在 40 0℃以上是明显和有效的。从渗透通量与样品上游氢压的关系来看 ,涂层使得表面效应对渗透过程的影响很大。在上游小流量及在液态铅锂合金中鼓泡充氢可以导致渗透通量升高。扫描电镜和能谱分析 (SEM EDS)的结果表明 ,样品表面被液态铅锂合金所浸润的部分出现微裂纹 ,而未浸润部分没有出现微裂纹。微裂纹很肤浅 ,仅仅影响涂层的最外表面薄层 ,没有贯穿整个渗铝层而到达基体。未浸润表面的Al O原子比约为 2 3 ,浸润表面约为 1 1 ,表明液态铅锂合金对渗铝层表面的Al2 O3 薄层造成了损伤。总的看来 ,造成氢渗透阻挡层性能退化的原因 ,是涂层外表面与液态铅锂合金相互作用 ,以及涂层在升。The hydrogen permeation experiment of MANET Ⅱ with hot dipping aluminized coating was performed in temperature range of 300 to 450 ℃,in gas phase and in liquid Pb-17Li phase.The hydrogen permeation reduction factor (PRF) evaluated in gas phase is 620～263 and in liquid Pb-17Li phase is 45～30.But,The PRFs obtained are still not satisfied for the goal of tritium permeation barrier.The self-healing of coating is obvious and effective above 400 ℃.The pressure dependence of permeation flux indicates strong surface contribution.The way of filling hydrogen by continuous flow and/or bubble can increase permeation flux.The result of SEM-EDS shows that the microcrack is on the surface of the wetted part,but not on the not wetted part.The crack is superficial and affects only thin outside layer,not penetrate aluminized layer.The surface elemental analysis shows that Al/O atomic ratio change from about 2/3 of not wetted part to about 1/1 of wetted part.The damage of coating surface seems to be related to the interaction of outside layer with liquid Pb-17Li and thermal stress during heating sample.Pb -1 7Liphase.Thehydro

关 键 词：MANETⅡ马氏体钢 氢渗透性能 热浸铝涂层 氢渗透通量 液态铅锂合金 防氚渗透阻挡层 聚变堆 材料 

分 类 号：TL627[核科学技术—核技术及应用]